ACNB CORP
S-4, 1998-10-16
STATE COMMERCIAL BANKS
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     As filed with the Securities and Exchange Commission on October 15, 1998

                                                  Registration No. 333-_____


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                  -------------------------------------------

                                    FORM S-4

             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933


                                ACNB CORPORATION
                 ----------------------------------------------
             (Exact name of registrant as specified in its charter)

     Pennsylvania                                       6022                  
- ----------------------------                 ----------------------------
(State or other jurisdiction of              (Primary Standard Industrial 
 incorporation or organization)              Classification Code Number)

                                   23-2233457
                       ---------------------------------
                      (I.R.S. Employer Identification No.)

 
   ACNB CORPORATION                               Ronald L. Hankey, President
 675 Old Harrisburg Road                               ACNB CORPORATION
  Post Office Box 3129                             675 Old Harrisburg Road
Gettysburg, Pennsylvania 117325-0129        Gettysburg, Pennsylvania 17325-0129
     (717) 334-3161                                      (717) 334-3161
- -------------------------------------       -----------------------------------
(Address, including ZIP Code, and           (Name, address, including ZIP Code,
telephone number, including area code,        and telephone number, including
of registrant's principal executive          area code, of agent for service)
offices)


                                 With A Copy To:
                          Nicholas Bybel, Jr., Esquire
                            B. Tyler Lincoln, Esquire
                             Shumaker Williams, P.C.
                               Post Office Box 88
                         Harrisburg, Pennsylvania 17108
                            Telephone: (717) 763-1121

Approximate  date of  commencement of the proposed sale of the securities to the
public:  As soon as  practicable  after the effective  date of the  Registration
Statement.

         If the  securities  being  registered on this Form are being offered in
connection  with the formation of a holding company and there is compliance with
General Instruction G, check the following box. [X]

<TABLE>
                         CALCULATION OF REGISTRATION FEE

<CAPTION>

Title of Each         Amount          Proposed Maximum        Proposed Maximum   
Class of Securities   to be             Offering Price            Aggregate      
Being Registered    Registered           Per Unit              Offering Price    
- --------------------------------------------------------------------------------
<S>                <C>                   <C>                  <C> 
Common Stock,
par value $2.50
per share          561,968 (1)(2)          $22.91               $12,874,686.88           

<CAPTION>

Title of Each                  Amount of
Class of Securities           Registration
Being Registered                  Fee
- ---------------------------------------------------------------------------
<S>                            <C>  
Common Stock,
par value $2.50
per share                       $3,798.03

<FN>

(1)  Shares  to be  issued  in  the  Merger  (as  defined  herein)  computed  in
     accordance with Rule  457(f)(2),  solely for the purpose of calculating the
     registration fee, based upon book value of Farmers Common Stock (as defined
     herein),  June 30, 1998, the latest  practicable  date prior to the date of
     filing of this Registration Statement.

(2)  Based on maximum number of shares of Registrant's  Common Stock that may be
     issued in connection with the proposed transaction. In accordance with Rule
     416, this Registration  Statement shall also register any additional shares
     of Registrant's  common stock that may become issuable to prevent  dilution
     resulting from stock splits,  stock  dividends or similar  transactions  as
     provided by the Agreement relating to the transaction.

</FN>
</TABLE>

     The Registrant  hereby amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the  Securities  Act of 1933, as amended,  or until the  Registration  Statement
shall become  effective on such date as the Commission,  acting pursuant to such
Section 8(a), may determine.


<PAGE>

                   [FARMERS NATIONAL BANCORP, INC. LETTERHEAD]

                                                         November 11, 1998




Dear Shareholder:

     We invite you to attend the  Special  Meeting  of  Shareholders  of Farmers
National  Bancorp,  Inc. (the  "Corporation"),  the holding  company for Farmers
National  Bank of Newville  ("FNB"),  to be held at One West Big Spring  Avenue,
Newville,  Pennsylvania 17241-0156,  on Tuesday, December 15, 1998, at 2:00 p.m.
(the  "Meeting").  The  Meeting  is  being  held  as a  result  of the  proposed
acquisition of the Corporation and of FNB by ACNB Corporation  ("ACNB"),  a $466
million bank holding company with 14 community banking offices in Pennsylvania.

     The  attached  Notice of  Special  Meeting  and Proxy  Statement/Prospectus
describe  the  formal  business  to be  transacted  at the  Meeting.  During the
Meeting, we will also report on the operations of the Corporation. Directors and
officers of the Corporation will be present to respond to any questions that our
shareholders may have.

     The purpose of the Meeting is to consider and vote upon the  Agreement  and
Plan of Reorganization  dated as of July 28, 1998, (the "Agreement"),  among the
Corporation, FNB, ACNB and ACNB North, Inc., a corporate subsidiary of ACNB that
was organized to facilitate the  acquisition of the  Corporation and of FNB. The
Agreement  provides  for the  merger  of ACNB  North,  Inc.,  with  and into the
Corporation (the "Merger") and the conversion of each  outstanding  share of the
Corporation's common stock into 2.266 shares of common stock of ACNB. Completion
of the Merger is subject to certain  conditions,  including  the approval of the
Agreement by the required vote of the Corporation's  shareholders at the Meeting
and approval by various regulatory agencies.

     Garland McPherson & Associates,  Inc., the Corporation's financial advisor,
has advised the Board of Directors  that in its opinion the  consideration  that
you are to receive in the Merger is fair,  from a financial  point of view.  The
Board of Directors  has carefully  considered  the Agreement and has agreed that
the Merger is in the best  interests of the  Corporation  and its  shareholders.
Accordingly,  the Board of Directors  recommends that you vote "FOR" approval of
the Agreement.

     The attached  Proxy  Statement/Prospectus  provides  important  information
about the Merger. We urge you to read it carefully.

                                      Sincerely,



                                      Edgar S. Heberlig,
                                      Chairman of the Board of Directors


           PLEASE DO NOT SEND IN YOUR STOCK CERTIFICATES AT THIS TIME

<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
                           One West Big Spring Avenue
                               Post Office Box 156
                        Newville, Pennsylvania 17241-0156
                                 (717) 776-5312

                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                         TO BE HELD ON DECEMBER 15, 1998

NOTICE IS HEREBY GIVEN that the Special Meeting of Shareholders  (the "Meeting")
of Farmers National Bancorp,  Inc.  ("Farmers"),  the holding company of Farmers
National Bank of Newville  ("FNB"),  will be held at One West Big Spring Avenue,
Newville,  Pennsylvania  17241 on Tuesday,  December 15,  1998,  at 2:00 p.m. We
enclose a Proxy Card and a Proxy Statement/Prospectus for the Meeting.

The Meeting is for the  purpose of  considering  and acting  upon the  following
matters:

1.   Approval and adoption of the Agreement and Plan of Reorganization, dated as
     of July 28, 1998 (the "Agreement") by and among ACNB Corporation  ("ACNB"),
     ACNB  North,  Inc.  ("ACNB  North"),  Farmers  and  FNB.  Pursuant  to  the
     Agreement,  ACNB North will merge with and into  Farmers and  Farmers  will
     become a wholly-owned  subsidiary of ACNB. FNB will become a  wholly-owned,
     second-tier  subsidiary of ACNB. Upon the consummation of the Merger,  each
     Farmers  shareholder  will  receive,  in exchange  for each share of common
     stock of Farmers,  par value $0.50 per share (the "Farmers  Common Stock"),
     2.266  shares of the common  stock of ACNB,  par value $2.50 per share (the
     "ACNB Common Stock"), as provided for in the Agreement;

2.   Adjournment of the Meeting to a later date, if necessary, to permit further
     solicitation of proxies in the event there are not sufficient  votes at the
     time of the Meeting to constitute a quorum or to approve the Agreement; and

3.   Other  matters as may properly  come before the Meeting or any  adjournment
     thereof that are incidental to the foregoing.

Any action may be taken on any one of the foregoing  proposals at the Meeting on
the date specified above, or on any date or dates to which, by original or later
adjournment, the Meeting may be adjourned. Pursuant to Farmers Bylaws, the Board
of Directors  has fixed the close of business on November 9, 1998, as the record
date for determination of the shareholders  entitled to notice of and to vote at
the Meeting and any adjournments or postponements thereof.

Your  participation  in  the  Meeting,  in  person  or by  proxy,  is  important
regardless of the number of shares you own.  Approval of the Merger requires the
affirmative  vote of the holders of 66 2/3% of the outstanding  shares of common
stock. An abstention or failure to vote has the same effect as


<PAGE>

voting against the Agreement. Therefore, we urge you, even if you plan to attend
the Meeting,  to complete,  sign, date and return the enclosed proxy card in the
enclosed  postage-paid  envelope  as soon as possible to assure that your shares
will be voted at the  Meeting.  If you do attend the Meeting and wish to vote in
person, you may do so by giving written notice of your decision to the Secretary
of the  Corporation so that your Proxy will be superseded by any ballot that you
submit at the Meeting. On behalf of the Board of Directors, I thank you for your
support and urge you to vote "FOR" approval of the Agreement.

Please sign and date the enclosed Proxy Card, which is solicited by the Board of
Directors,  and mail it promptly in the  enclosed  envelope.  The giving of your
proxy does not  affect  your right to vote in person in the event you attend the
Meeting.

                                         BY ORDER OF THE BOARD OF DIRECTORS


Newville, Pennsylvania                  /s/ Edgar S. Heberlig
                                        -------------------------------------
November 11, 1998                       Edgar S. Heberlig,
                                        Chairman of the Board of Directors 
                                         and President


<PAGE>

                           PROXY STATEMENT/PROSPECTUS

                                ACNB CORPORATION
                                 PROSPECTUS FOR
                         561,968 SHARES OF COMMON STOCK
                            PAR VALUE $2.50 PER SHARE

                         FARMERS NATIONAL BANCORP, INC.
                               PROXY STATEMENT FOR
                         SPECIAL MEETING OF SHAREHOLDERS
                                DECEMBER 15, 1998

     The Board of Directors of Farmers National Bancorp, Inc.  ("Farmers"),  the
holding  company of Farmers  National Bank of Newville  ("FNB"),  furnishes this
Proxy Statement/Prospectus to you in connection with the solicitation of proxies
to be used at the Special Meeting of  Shareholders  of Farmers (the  "Meeting"),
which will be held at One West Big Spring Avenue,  Newville,  Pennsylvania 17241
on  Tuesday,   December  15,  1998,  at  2:00  p.m.  Farmers  first  mailed  the
accompanying   Notice  of   Special   Meeting,   Proxy   Card  and  this   Proxy
Statement/Prospectus to shareholders on or about November 11, 1998.

     At the  Meeting,  holders of record of common  stock of Farmers,  par value
$.50 per share (the "Farmers Common Stock"), as of November 9, 1998 (the "Record
Date") will  consider and vote upon the  approval and adoption of the  Agreement
and Plan of Reorganization,  dated as of July 28, 1998, (the "Agreement") by and
among ACNB Corporation  ("ACNB"),  ACNB North, Inc. ("ACNB North"),  Farmers and
FNB. We attach a copy of the  Agreement as Annex A. In addition to voting on the
Agreement,  you, as shareholders  of Farmers,  may be asked to consider and vote
upon approval of the  postponement  or adjournment of the Meeting,  in the event
there are not  sufficient  votes  cast in person or by proxy at the  Meeting  to
constitute a quorum or to approve the  Agreement,  and such other matters as may
properly come before the Meeting or any adjournments thereof.

     The  Agreement  provides  that ACNB North will merge with and into Farmers,
Farmers  will become a  wholly-owned  subsidiary  of ACNB,  under the name "ACNB
North, Inc.," and FNB will become a wholly-owned, second-tier subsidiary of ACNB
(the "Merger").  Upon the consummation of the Merger,  each Farmers  shareholder
will have a right to receive  2.266  shares of common  stock of ACNB,  par value
$2.50 per share  (the "ACNB  Common  Stock")  for each  share of Farmers  Common
Stock.

     Neither ACNB Common Stock nor Farmers  Common Stock is traded on The Nasdaq
Stock Market or any stock exchange.

     Neither the  Securities and Exchange  Commission  nor any state  securities
commission  has  approved or  disapproved  these  securities  or passed upon the
accuracy or adequacy of this Proxy  Statement/Prospectus.  Any representation to
the contrary is a criminal offense.

     The shares of ACNB  common  stock  issuable  in the Merger are not  savings
accounts, deposits or other obligations of a bank or savings institution and are
not  insured  by  the  Federal  Deposit  Insurance   Corporation  or  any  other
governmental agency. This Proxy  Statement/Prospectus does not cover any resales
of the ACNB Common Stock issuable in the Merger by any shareholders deemed to be
affiliates  of Farmers or of ACNB.  No person is  authorized to make use of this
Proxy  Statement/Prospectus in connection with such resales, although such stock
may  be  traded  without  use  of  this  Proxy  Statement/Prospectus  by  former
shareholders of Farmers who are not deemed to be affiliates of Farmers or ACNB.

     No  person  is  authorized  to  give  any   information   or  to  make  any
representations  other than those  contained in this Proxy  Statement/Prospectus
and, if given or made,  such other  information or  representations  must not be
relied  upon  as  having  been  authorized  by  ACNB  or  Farmers.   This  Proxy
Statement/Prospectus  does not constitute an offer to sell, or a solicitation of
an offer to buy, any security  other than the  securities  covered by this Proxy
Statement/Prospectus,  or the  solicitation  of a proxy to or from any person in
any  jurisdiction  where it is unlawful to make such offer or solicitation of an
offer   or   proxy   solicitation.   Neither   the   delivery   of  this   Proxy
Statement/Prospectus  nor any  distribution of securities made hereunder  shall,
under any circumstances, create any implication that there has been no change in
the   information    about   ACNB   or   Farmers   contained   in   this   Proxy
Statement/Prospectus since the date hereof.

        The date of this Proxy Statement/Prospectus is November 11, 1998.


<PAGE>

     This Proxy  Statement/Prospectus  constitutes a prospectus of ACNB filed as
part  of a  registration  statement  filed  with  the  Securities  and  Exchange
Commission relating to the 561,968 shares of ACNB Common Stock issuable pursuant
to the Agreement.  All information contained in this Proxy  Statement/Prospectus
with respect to ACNB and its  subsidiaries  has been  supplied by ACNB,  and all
information  with respect to Farmers and its  respective  subsidiaries  has been
supplied by Farmers.

<PAGE>

                                TABLE OF CONTENTS
                                                                      Page

SUMMARY  .........................................................      1
         The Meeting..............................................      1
         Vote Required............................................      1
         Forward-Looking Statements...............................      1
         Farmers and FNB..........................................      2
         ACNB.....................................................      2
         Available Information....................................      2
         The Merger...............................................      3
         Opinions of Financial Advisor............................      4
         Recommendations of the Board of Directors................      4
         Dissenters' Rights.......................................      4
         Federal Income Tax Consequences of the Merge.............      5
         Accounting Treatment.....................................      5
         Comparison of Shareholder Rights.........................      5
         Conditions to the Merger.................................      6
         Operations After the Merger..............................      6
         Termination of the Merger................................      6
         Expenses.................................................      7
         Dividends................................................      7
         Adjournment of the Meeting...............................      7

COMPARATIVE PER SHARE DATA .......................................      8
         General..................................................      8
         Market Value of Securities...............................      9

SELECTED FINANCIAL DATA.  ........................................     10

THE MEETING  .....................................................     13
         General  ................................................     13
         Voting, Revocation and Solicitation of Proxies  .........     13
         Voting Securities and Security Ownership  ...............     15
         Other Matters  ..........................................     17
         Auditors of Farmers  ....................................     17

APPROVAL OF THE  MERGER  .........................................     17
       Background of the Merger, Reasons and Recommendation
            of the Board of Directors  ...........................     17
       Vote Required  ............................................     18

                                        i

<PAGE>
                                                                                
                                                                     Page

       Opinion of Financial Advisor  .............................     19
       Dissenters' Rights  .......................................     23
       Terms of the Merger  ......................................     26
       Regulatory Approvals of Farmers............................     41
       Interests of Certain Persons in the Merger.................     42
       Management and Operations Following the Merger.............     43
       Accounting Treatment of the Merger  .......................     44
       Income Tax Consequences of the Merger  ....................     44

DESCRIPTION OF ACNB AND ITS COMMON STOCK  ........................     46
       Information Concerning ACNB  ..............................     46
       Incorporation by Reference.................................     46
       General  ..................................................     47
       Common Stock  .............................................     47
       Pennsylvania Anti-Takeover Law Provisions  ................     48
       Provisions in ACNB's Articles of
          Incorporation and Bylaws  ..............................     49

COMPARISON OF SHAREHOLDER RIGHTS  ................................     50
       Introduction.  ............................................     50
       Dividends  ................................................     52
       Limitations on Directors' Liability  ......................     52
       Indemnification  ..........................................     52

DIVIDENDS AND MARKET PRICES OF SECURITIES  .......................     53
       ACNB  .....................................................     53
       Farmers  ..................................................     53

REGULATIONS AFFECTING DIVIDENDS  .................................     54

BUSINESS OF FARMERS  .............................................     54
       General  ..................................................     54
       Services  .................................................     55
       Regulation  ...............................................     55
       Competition  ..............................................     57
       Employees  ................................................     58
       Certain Relationships and Related Party Transactions  .....     58
       Litigation  ...............................................     58
       Properties  ...............................................     58
       Impact of the Year 2000 Issue  ............................     59

IMPACT OF THE YEAR 2000 ISSUE ON ACNB  ...........................     60

                                       ii

<PAGE>

                                                                     Page

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITION AND RESULTS OF OPERATIONS OF FARMERS  .................     62
       Balance Sheet Analysis  ..................................     63
       Income Statement Analysis  ...............................     68

ADJOURNMENT OF THE MEETING  .....................................     70

INDEPENDENT ACCOUNTANTS  ........................................     70

EXPERTS  ........................................................     70

LEGAL OPINIONS  .................................................     70

OTHER MATTERS....................................................     71

ADDITIONAL INFORMATION...........................................     71

INDEX TO FINANCIAL STATEMENTS
FARMERS NATIONAL BANCORP, INC.....................................   F-1

ANNEX A        AGREEMENT  ........................................   A-1
ANNEX B        OPINION OF GARLAND McPHERSON & ASSOCIATES, INC.  ..   B-1
ANNEX C        DISSENTERS' RIGHTS PROVISIONS  ....................   C-1


     This  Proxy   Statement/Prospectus   incorporates  important  business  and
financial  information  about ACNB that is not  included or  delivered  with the
document.   This   information  is  available,   without  charge,   to  Farmer's
shareholders. Please direct requests to the Secretary, ACNB Corporation, 675 Old
Harrisburg Road, P. O. Box 3129, Gettysburg,  Pennsylvania 17325-0129, telephone
number (717)  334-3161.  In order to ensure timely  delivery of the documents in
advance of the Meeting,  you should make your request no later than  December 8,
1998.


                                       iii

<PAGE>

                                     SUMMARY

     The following summary of the material aspects of the Merger is not intended
to be complete and is qualified in its entirety by the more detailed  discussion
elsewhere or  incorporated by reference in this Proxy  Statement/Prospectus  and
its  Appendices.  We urge you to read  the  entire  Proxy  Statement/Prospectus,
including  the  Appendices  hereto,  in order for you to  understand  the Merger
fully.

The Meeting

     We will  hold the  Meeting  to vote on the  Merger  at One West Big  Spring
Avenue,  Newville,  Pennsylvania on Tuesday,  December 15, 1998, at 2:00 p.m. At
the Meeting,  those  shareholders who hold shares of Farmers Common Stock, as of
November 9, 1998, the Record Date,  will consider and vote upon the approval and
adoption of the Agreement. In addition, shareholders of Farmers may consider and
vote upon the approval of the adjournment of the Meeting, in the event there are
not  sufficient  votes cast in person or by proxy at the Meeting to constitute a
quorum or to approve the Agreement.  You may also be asked to vote on such other
matters as may  properly  come before the Meeting or any  adjournments  thereof.
Each  share  entitled  to vote at the  Meeting  is  entitled  to one  vote.  The
presence,  in person or by proxy,  of at least a majority of the total number of
shares of Farmers Common Stock outstanding and entitled to vote as of the Record
Date will be required to constitute a quorum at the Meeting.

Vote Required

     Approval of the Agreement  requires the affirmative  vote of the holders of
66 2/3% of the  outstanding  shares  of  Farmers  Common  Stock.  Directors  and
executive  officers are  expected to vote  substantially  all of the  __________
shares  held by them,  representing  approximately  ___________  percent  of the
Farmers Common Stock  outstanding at the Record Date and entitled to vote at the
Meeting, "FOR" approval of the Agreement.

Forward-Looking Statements

     This Proxy  Statement/Prospectus  contains  and  incorporates  by reference
certain  statements  that  constitute  "forward-looking  statements"  within the
meaning  of  the  Private  Securities  Litigation  Reform  Act  of  1995.  These
forward-looking  statements include all statements regarding the intent,  belief
or current  expectations  regarding  the matters  discussed or  incorporated  by
reference  in  this  Proxy  Statement/Prospectus  (including  statements  as  to
"beliefs," "expectations,"  "anticipations,"  "intentions" or similar words) and
all statements  that are not statements of historical  fact. Such statements are
subject to risks, uncertainties and assumptions,  including, but not limited to,
trends  for the  continued  growth  of the  business  of ACNB and  Farmers,  the
realization of  anticipated  revenues,  profitability  and cost synergies of the
combined  companies,  and other risks and  uncertainties.  Should one or more of
these risks or uncertainties  materialize or should underlying assumptions prove
incorrect, actual results,

                                        1

<PAGE>

performance  or  achievements  in 1999 and beyond could differ  materially  from
those expressed in, or implied by, such forward-looking statements.

Farmers and FNB

     Farmers is a Pennsylvania  business  corporation formed on August 14, 1991,
and functions as the bank holding company for FNB. Farmers'  principal  business
has been directing, planning and coordinating the business activities of FNB.

     FNB  is  a  national   banking   association   headquartered  in  Newville,
Pennsylvania,  which  conducts  business  through three  offices.  One office is
located in  Newville  (the main  office).  The second  office is located in West
Pennsboro  Township,  Pennsylvania.  The  third  office,  also  located  in West
Pennsboro Township, is open two afternoons each week.

     Farmers'  executive  offices  are  located at One West Big  Spring  Avenue,
Newville,  Pennsylvania  17241, and its telephone  number is (717) 776-5312.  We
discuss Farmers and FNB in more detail at "BUSINESS OF FARMERS," below.

ACNB

     ACNB is a bank holding  company whose sole activity  consists of owning and
supervising Adams County National Bank (the "Bank"), its depository  subsidiary.
ACNB was incorporated in Pennsylvania on November 9, 1983. Its executive offices
are located at 675 Old Harrisburg Road, Gettysburg,  Pennsylvania 17325, and its
telephone number is (717) 334-3161.

     ACNB and the Bank have the same Board of Directors.  ACNB  presently has no
significant operations other than serving as a holding company. The Bank engages
in a full-service  commercial and consumer banking and trust business.  With its
main  office at 675 Old  Harrisburg  Road,  Gettysburg,  Pennsylvania,  the Bank
provides  financial  services to its  customers  through its  community  banking
network of  fourteen  full-service  offices  located  throughout  Adams  County,
Pennsylvania, and in Hanover, York County, Pennsylvania.

     The Bank's officers conduct the day-to-day  management of the Bank, subject
to review  by its  board of  directors,  thereby  permitting  the Bank to retain
substantial autonomy to better service its market in day-to-day  operations.  We
discuss  ACNB in more  detail in  "DESCRIPTION  OF ACNB AND ITS  COMMON  STOCK,"
below.

Available Information

     ACNB  is  subject  to the  informational  requirements  of  the  Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and,  accordingly,  files
reports, proxy statements and other information with the Securities and Exchange
Commission  (the  "Commission").   Such  reports,  proxy  statements  and  other
information filed with the Commission are available for inspection

                                        2

<PAGE>


and copying at the public reference  facilities  maintained by the Commission at
Judiciary  Plaza,  450 Fifth Street,  N.W.,  Washington,  D.C. 20549, and at the
Commission's  Regional  Offices  located at Citicorp  Center,  500 West  Madison
Street,  Suite 1400,  Chicago,  Illinois 60661 and at World Trade Center,  Suite
1300,  New York,  New York 10048.  Copies of such documents may also be obtained
from the Public  Reference  Section of the  Commission at Judiciary  Plaza,  450
Fifth Street,  N.W.,  Washington,  D.C. 20549, at prescribed  rates.  ACNB is an
electronic filer with the Commission.  The Commission  maintains a Web site that
contains  reports,  proxy  and  information  statements  and  other  information
regarding registrants that file electronically with the Commission.  The address
of the Commission Web site is: http://www.sec.gov.

     Neither the ACNB Common Stock nor the Farmers  Common  Stock is  authorized
for  quotation  on The  National  Association  of  Securities  Dealers  ("NASD")
Automatic Quotations ("NASDAQ") National Market System or any stock exchange.

     This Proxy Statement/Prospectus forms a part of a Registration Statement on
Form S-4 that ACNB has filed with the  Commission  under the  Securities  Act of
1933, as amended (the "Securities  Act"),  with respect to the ACNB Common Stock
issuable   in  the   Merger   (the   "Registration   Statement").   This   Proxy
Statement/Prospectus does not contain all of the information in the Registration
Statement,   certain  parts  of  which  are  omitted  in  accordance   with  the
Commission's  rules and  regulations.  You may inspect and copy the Registration
Statement,  including  any  amendments  and  exhibits  thereto as stated  above.
Statements  contained in this Proxy  Statement/Prospectus  as to the contents of
any contract or other document are not necessarily  complete,  and we refer you,
in each case to the copy of such contract or other document, filed as an exhibit
to the Registration Statement. We also qualify our discussions, in all respects,
by such reference.

The Merger

     In the Merger,  Farmers will become a  wholly-owned  subsidiary of ACNB and
FNB will become a  wholly-owned,  second-tier  subsidiary  of ACNB.  The parties
propose  to effect  the  Merger by means of a merger of ACNB North with and into
Farmers.  Farmers will survive Merger  (sometimes  referred to as the "Surviving
Corporation"),  and continue business as a second-tier  subsidiary of ACNB. Upon
the consummation of the Merger,  Farmers  shareholders will receive 2.266 shares
of ACNB Common  Stock in exchange  for each share of Farmers  Common  Stock (the
"Merger  Consideration").  Farmers  shareholders  will receive a cash payment in
lieu of any fractional share of ACNB Common Stock that the Farmers  shareholders
would  otherwise be entitled to receive.  The last  reported  sale price of ACNB
Common  Stock was $____ per share on  November  __,  1998.  Consummation  of the
Merger is conditioned upon, among other things, the approval of the Agreement by
the requisite vote of Farmers' shareholders and by various regulatory agencies.

                                        3

<PAGE>

     Under  the  terms  of the  Agreement,  Farmers  shareholders  will  receive
approximately  561,968  shares of ACNB Common  Stock will be  exchanged  for the
outstanding Farmers Common Stock.

     Farmers and ACNB have the right to terminate  the  Agreement  under certain
circumstances,  including if the Merger is not consummated by June 30, 1999. The
parties have the right to extend the time for closing  beyond June 30, 1999,  by
mutually amending the Agreement.

     ACNB and Farmers  propose to close the  transaction in the first quarter of
1999, after receipt of all required regulatory  approvals,  including receipt of
approval of Farmers'  shareholders (the "Effective Date"). We discuss the Merger
in more detail in "APPROVAL OF THE MERGER," below.

Opinion of Financial Advisor

     The Farmers Board of Directors asked Garland  McPherson & Associates,  Inc.
("GM&A"),  Farmers'  financial  advisor,  to render an  opinion  that the Merger
Consideration  is fair,  from a  financial  point of view,  to  shareholders  of
Farmers. We recommend that you read the opinion, which is attached to this Proxy
Statement/Prospectus  as Annex B,  and  "APPROVAL  OF THE  MERGER -  Opinion  of
Financial  Advisor,"  below. You should read the opinion in its entirety and pay
particular  attention to the  assumptions  made and other matters  considered by
GM&A in rendering the opinion.

Recommendations of the Board of Directors

     The   consideration  to  be  received  by  Farmers'   shareholders  in  the
transaction was negotiated by the Farmers Board of Directors in light of various
factors,  including  Farmers'  and  ACNB's  recent  operating  results,  current
financial  condition  and  perceived  future  prospects.  The  Farmers  Board of
Directors  believes  that  the  Merger  is in the  best  interests  of  Farmers'
shareholders  and recommends that Farmers'  shareholders  vote "FOR" approval of
the Agreement.

Dissenters' Rights

     The Pennsylvania  Business  Corporation Law of 1988, as amended (the "BCL")
grants to certain  shareholders,  including the holders of Farmers Common Stock,
the right to dissent from approval of the Merger,  and to demand and receive the
"fair  value" of their  shares of Farmers  Common  Stock  rather than the Merger
Consideration.   In  order  to  assert  these  dissenters'   rights,  a  Farmers
shareholder must:

     *    file a written  notice of intent to dissent  with  Farmers  before the
          shareholder vote at the Meeting;

     *    not vote in favor of the Merger;

                                        4

<PAGE>

     *    file a  written  demand  for  payment  and  deposit  the  certificates
          representing  his or her  shares in  accordance  with the terms of the
          notice to demand payment that Farmers will send; and

     *    comply with certain other statutory procedures set forth in the BCL.

If you return your proxy without voting  instructions,  your proxy will be voted
in favor of the Agreement,  and you will forfeit any dissenters' rights that you
may have with respect to the Merger.  A copy of the  applicable  sections of the
BCL are attached to this Proxy  Statement/Prospectus  as Annex C. If you deviate
from the procedures set forth in the statutory provisions,  you may forfeit your
dissenters'  rights  with  respect to the  Merger.  Accordingly,  if you wish to
assert  dissenters'  rights  we urge  you to  read  carefully  "APPROVAL  OF THE
MERGER--Dissenters' Rights" and Annex C to this Proxy Statement/Prospectus.

Federal Income Tax Consequences of the Merger

     ACNB  and   Farmers   anticipate   that  the  Merger  will  be  a  tax-free
reorganization  for federal  income tax purposes  and that Farmers  shareholders
will recognize no gain or loss on the exchange of their Farmers Common Stock for
ACNB  Common  Stock  (other  than  with  respect  to  cash  received  in lieu of
fractional  shares and cash  received upon exercise of  dissenters'  rights,  if
any).  You  should  consult  with  your  own  tax  advisers  regarding  the  tax
consequences  of the Merger with respect to your own  particular  circumstances.
See "APPROVAL OF THE MERGER--Income Tax Consequences of the Merger."

Accounting Treatment

     Farmers and ACNB intend  that the Merger be  accounted  for as a pooling of
interests   for   financial   accounting   purposes.   See   "APPROVAL   OF  THE
MERGER--Accounting Treatment of the Merger."

Comparison of Shareholder Rights

     Upon the  consummation of the Merger,  holders of Farmers Common Stock will
become shareholders of ACNB, a Pennsylvania  business  corporation.  Farmers and
ACNB are each organized as Pennsylvania  business corporations and, accordingly,
the rights of former Farmers  shareholders  after the Merger will continue to be
governed by the BCL as well as the articles of incorporation  and bylaws of ACNB
(referred to as the "ACNB Articles" and ACNB Bylaws"). Certain differences exist
in the rights of the shareholders of ACNB and Farmers. These differences are due
to the  differences  in the ACNB  Articles  and ACNB Bylaws and the  articles of
incorporation and bylaws of Farmers  (referred to as the "Farmers  Articles" and
Farmers Bylaws").  A discussion of these differences is set forth in "COMPARISON
OF SHAREHOLDER RIGHTS," below.

                                        5

<PAGE>

Conditions to the Merger

     Consummation  of the Merger is subject  to  various  conditions,  including
notice to or  approval  of the Merger by the Board of  Governors  of the Federal
Reserve System ("Federal  Reserve Board") and by the Pennsylvania  Department of
Banking (the "Department of Banking").  On  _______________,  1998, ACNB filed a
Notice,  meeting the  requirements  of approval of the Merger under Section 3 of
the Bank Holding  Company Act of 1956,  as amended  (the  "Banking  Code"),  and
pursuant  to  Section  225.14 of Federal  Reserve  Board  Regulations,  with the
Federal Reserve Bank of Philadelphia (the "FRB Notice").  ACNB filed Application
with the Department of Banking,  pursuant to Sections 112 and 115 of the Banking
Code (the "PA Application"). We await action on these Applications.

     The Merger is also  subject to  satisfaction  of various  other  conditions
specified  in the  Agreement,  including  the  approval of the  Agreement by the
requisite vote of Farmers'  shareholders  and the  satisfaction  of the criteria
necessary to permit a pooling of interests for accounting purposes. In the event
that more than 10% of the outstanding  shares of Farmers are covered through the
exercise of dissenters' rights, the criteria for  pooling-of-interest  treatment
will  not  be   satisfied.   See   "APPROVAL   OF  THE   MERGER--Terms   of  the
Merger--Conditions Precedent" and "APPROVAL OF THE MERGER--Dissenters' Rights."

Operations After the Merger

     The Agreement  provides that, on the Effective Date, two persons,  mutually
agreed upon by ACNB and  Farmers,  who have  previously  served as  directors of
Farmers  will be  appointed to the ACNB Board of  Directors.  In  addition,  the
directors  of FNB on the  Effective  Date,  together  with  Ronald L. Hankey and
Carolyn H. Kough, will serve as members of the FNB Board of Directors  following
the Merger.  See "APPROVAL OF THE MERGER - Management and  Operations  Following
the Merger."

Termination of the  Merger

     The Agreement  provides  that,  whether before or after its approval by the
shareholders  of Farmers,  the Agreement may be terminated and the  transactions
described in the Agreement abandoned at any time prior to the Effective Date:

     *    by the mutual  written  consent of ACNB and Farmers,  if a majority of
          the entire board of directors votes to terminate the Agreement;

     *    by  Farmers  in the  event  (a) of a  material  breach  by ACNB of any
          representation,  warranty,  covenant  or  agreement  contained  in the
          Agreement that is not cured within 30 days after written notice of the
          breach is given to ACNB by Farmers, (b) by written notice to ACNB that
          any condition precedent to Farmers'

                                        6

<PAGE>

          obligations  as set forth in Article VI of the  Agreement has not been
          met or waived by Farmers at the time that the  condition can no longer
          be satisfied;

     *    by ACNB in the event (a) of a material breach by Farmers or FNB of any
          representation,  warranty,  covenant  or  agreement  contained  in the
          Agreement that is not cured within 30 days after written notice of the
          breach  is  given to  Farmers  by  ACNB,  or (b)  that  any  condition
          precedent  to ACNB's  obligations  as set forth in  Article  VI of the
          Agreement  has not been  met or  waived  by ACNB at the time  that the
          condition can no longer be satisfied; or

     *    by ACNB or Farmers if the Merger is not  consummated by June 30, 1999,
          unless the failure to so  consummate by such time is due to the breach
          of any representation, warranty or covenant contained in the Agreement
          by the party seeking to terminate;  provided,  however, that such date
          may be extended by the written agreement of the parties. Expenses

     If the Agreement is terminated,  in accordance  with its terms:  (i) by the
mutual,  written  consent of Farmers and ACNB; or (ii) by Farmers or ACNB in the
event the Merger is not consummated by June 30, 1999, the  termination  shall be
without  cost,  liability  or  expense  on the part of any  party  to the  other
parties.  In all other instances,  termination of the Agreement shall be without
cost, liability or expense on the part of any party to the other parties, unless
the breach of a  representation,  warranty  or covenant is caused by the willful
conduct  or gross  negligence  of the party,  in which  event such party will be
liable to the other parties for all out-of-pocket costs and expenses.

Dividends

     The  Agreement  provides  that Farmers shall only declare and pay quarterly
cash  dividends  in an amount not in excess of $0.17 per share  during the third
and fourth calendar quarters of 1998.

Adjournment of the Meeting

     In the event that an insufficient  number of votes are cast in person or by
proxy at the Meeting to approve and adopt the  Agreement,  the Farmers  Board of
Directors  intends to adjourn  the Meeting to a later date to permit the further
solicitation of sufficient votes to approve the Agreement.  The affirmative vote
of a majority of the shares represented and voting at the Meeting is required in
order to approve any such adjournment.

     The Farmers Board of Directors  recommends that shareholders vote "FOR" the
proposal to adjourn the Meeting if necessary to permit further  solicitation  of
proxies to approve the Agreement.

                                        7

<PAGE>

                           COMPARATIVE PER SHARE DATA

     General

     We set forth on the following table selected comparative per share data for
each of ACNB and Farmers on a historical basis, and selected unaudited pro forma
comparative  per share data assuming the Merger had been  consummated  as of the
beginning of the earliest period  presented for earnings per share and dividends
per share and as of the end of the  period  presented  for book value per share.
The unaudited pro forma  financial  data has been prepared  giving effect to the
Merger  as a  pooling-of-interests.  The  pro  forma  data  is  not  necessarily
indicative  of results that would have been  achieved had the  transaction  been
consummated on such date and should not be construed as representative of future
operations.  The information  presented  should be read in conjunction  with the
historical consolidated financial statements,  and notes thereto, of ACNB and of
Farmers   incorporated  by  reference  or  appearing  elsewhere  in  this  Proxy
Statement/Prospectus, and we urge you to do so.

                                  Six Months Ended     Year Ended December 31,
                                   June 30, 1998     1997       1996      1995
                                  ----------------   --------------------------
ACNB Historical per share:
     Net income - Basic               $  .70      $ 1.38     $ 1.34     $1.22
     Net income - Diluted                .70        1.38       1.34      1.22
     Cash dividends declared             .38         .79       1.70       .66
     Book  value                       10.17       10.02       9.37      9.70

Farmers Historical per share [1]:
     Net income - Basic               $ 1.18      $ 2.18     $ 1.92    $ 1.66
     Net income - Diluted               1.18        2.18       1.92      1.66
     Cash dividends declared            0.30        0.50       0.45      0.425
     Book  value                       22.91       22.03      20.36     18.90

Pro Forma per ACNB
     Common Share:
     Net income - Basic               $  .68      $ 1.34     $ 1.29    $ 1.17 
     Net income - Diluted                .68        1.34       1.29      1.17   
     Cash dividends declared             .36         .73       1.55       .61 
     Book  value                       10.16        9.99       9.33      9.57   

Pro Forma Equivalent per Farmers
     Common Share [2]:
     Net income - Basic               $ 1.54      $ 3.04    $ 2.92     $ 2.65
     Net income - Diluted               1.54        3.04      2.92       2.65
     Cash dividends declared             .82        1.65      3.51       1.38
     Book  value                       23.02       22.64     21.14      21.01

[1]  Farmers historical amounts are adjusted for the stock split in 1997.

[2]  Pro Forma amounts per share were calculated by taking the corresponding per
     share  amounts for ACNB and Farmers  combined  and  multiplying  that by an
     exchange  ratio which gives  effect to the exchange of 2.266 shares of ACNB
     common stock for each outstanding share of Farmers at each reporting date.

                                        8

<PAGE>

Market Value of Securities

     There is no  established  public  trading  market  for ACNB  Common  Stock.
However,  bids  for  ACNB  Common  Stock  are  quoted  on  the  over-the-counter
Electronic  Bulletin Board Interdealer  System.  Trading in ACNB Common Stock is
limited and sporadic. The absence of an established market may affect the prices
at which ACNB's shares are traded.  Subject to the foregoing,  the sale price of
ACNB  Common  Stock  on  July  27,  1998,  the  last  trading  date  before  the
announcement of the Merger, was $29.25 per share.

     There is no established trading market for Farmers Common Stock. Trading in
Farmers  Common  Stock is limited  and  sporadic.  In  addition,  Farmers is not
subject to the requirement of filing periodic  reports with the Commission.  The
absence of an established  market may affect the prices at which Farmers' shares
are traded.  Subject to the  foregoing,  the most recent sale of Farmers  Common
Stock prior to July 27, 1998, the last trading date before  announcement  of the
Merger, was a sale of 146 shares at $33.75 per share on June 30, 1998.


                                        9

<PAGE>

                             SELECTED FINANCIAL DATA

     We  set  forth  on  the  following  tables  certain  selected  consolidated
historical  summary  financial  data,  for  the  periods  and  as of  the  dates
indicated,  for ACNB and for  Farmers.  This data is derived  from and should be
read in conjunction  with, and is qualified in its entirety by, the consolidated
financial  statements  of ACNB and of  Farmers,  including  the  notes  thereto,
incorporated    by   reference   or   appearing    elsewhere   in   this   Proxy
Statement/Prospectus.  Interim  unaudited  data for the six month  periods ended
June 30,  1998,  and 1997  reflects,  in the  opinion  of  ACNB's  and  Farmers'
respective  managements,  all adjustments  necessary for a fair  presentation of
such  data.  Results  for the  periods  ended  June 30,  1998,  and 1997 are not
necessarily indicative of results which may be expected for any other periods or
for the fiscal years as a whole.


                                       10

<PAGE>
<TABLE>

                                 ACNB Historical
                  (Dollars in thousands except per share data)
<CAPTION>


                 At or for the Six Months
                      Ended June 30,      At or for the Year Ended December 31,
                ------------------------- -------------------------------------
                       1998      1997        1997        1996          1995
                       ----      ----        ----        ----          ---- 
<S>                 <C>       <C>          <C>         <C>            <C>  
Earnings Data
Net interest income  $10,142   $10,061     $20,151      $18,770       $17,776
Provision for loan
 and lease losses        180        90         210           30             0
Other income           1,106       920       1,920        1,986         1,627
Other expense          5,576     5,481      11,064       10,129         9,809
Income before taxes    5,492     5,410      10,797       10,597         9,594
Net income             3,674     3,623       7,229        7,109         6,459
Basic earnings per
 common share            .70       .68        1.38         1.34          1.22
Dividends declared
 per common share        .38       .36         .79         1.70           .66

Balance Sheet Data
Assets               483,940   466,342     466,837      472,445       459,353
Loans and leases,
 net of unearned
 income              341,904   340,183     341,238      324,927       323,128
Deposits             408,491   399,075     395,573      403,127       392,243
Shareholders'
 equity               54,471    50,731      52,618       49,436        51,463
Shareholders' equity
 per share (book
 value)                10.37      9.66       10.02         9.37          9.70

Selected Ratios
Return on average
 assets                 1.56      1.58        1.55         1.53          1.41
Return on average
 shareholders'
 equity                14.01     14.65       14.14        14.77         12.84
Average shareholders'
 equity to assets      11.26     10.88       11.27        10.46         11.20
Net interest yield      4.50      4.53        4.50         4.20          4.03
Net charge-offs to
 average loans and
 leases                  .03       .03         .06          .04           .03
Allowance for loan
 and lease losses
 to period-end loans
 and leases              .95       .93         .93          .98          1.01
Nonperforming assets to
 period-end loans and
 leases and OREO         .97      1.04         .83          .98          1.20

- --------------------

</TABLE>

                                       11

<PAGE>
<TABLE>


                               Farmers Historical
                  (Dollars in thousands except per share data)
<CAPTION>


                    At or for the Six Months
                         Ended June 30,    At or for the Year Ended December 31,
                    ---------------------- -------------------------------------
                        1998       1997      1997          1996          1995
<S>                   <C>        <C>        <C>          <C>            <C>     
Earnings Data
Net interest income    $  822    $  815     $1,663        $1,538        $1,481
Provision for loan
 and lease losses           0         0          0             0             0
Other income               91        79        140           122            54
Other expense             507       479      1,047           975           945
Income before taxes       406       415        756           685           590
Net income                293       295        541           480           415
Basic earnings per
 common share            1.18      1.19       2.18          1.92          1.66
Dividends declared per
 common shar              .30       .23        .50           .45           .425

Balance Sheet Data
Assets                $42,765   $41,446    $41,221       $40,730       $37,871
Loans, net of
 unearned income       16,457    15,843     16,486        15,612        14,991
Deposits               36,657    35,776     35,481        35,360        32,890
Shareholders' equity    5,681     5,276      5,464         5,090         4,725
Shareholders' equity
 per share (book value) 22.91     21.27      22.03         20.36         18.90


Selected Ratios
Return on average
 assets                 1.39       1.43       1.31          1.22          1.11
Return on average
 shareholders' equity  10.38      11.32      10.05          9.54          8.91
Average shareholders'
 equity to assets      13.38      12.57      12.48         12.78         12.49
Net interest yield      4.42       4.40       4.48          4.31          4.41
Net charge-offs to
 average loans           .01        .04        .11           .05           .01
Allowance for loan losses
   to period-end loans  1.08       1.17       1.07          1.24          1.34
Nonperforming assets
 to period-end
 loans and OREO         2.94       3.46       2.61          2.81          1.12

</TABLE>


                                       12

<PAGE>

                                   THE MEETING

General

     We  furnish  this  Proxy   Statement/Prospectus   in  connection  with  the
solicitation  of proxies by the  Farmers  Board of  Directors  to be used at the
Meeting that will be held at One West Big Spring Avenue, Newville,  Pennsylvania
on Tuesday, December 15, 1998, at 2:00 p.m.

     At the Meeting,  holders of record of Farmers Common Stock as of the Record
Date may consider and vote upon:

     *    the approval and adoption of the Agreement;

     *    the approval of the adjournment or postponement of the Meeting, in the
          event there are not sufficient votes cast in person or by proxy at the
          Meeting to approve the Agreement; and

     *    such other  matters as may  properly  come  before the  Meeting or any
          adjournments thereof.

     Pursuant to the Agreement, Farmers will become a wholly-owned subsidiary of
ACNB by means of a merger of ACNB North with and into  Farmers.  Thereupon,  FNB
will become a wholly-owned second tier subsidiary of ACNB. Upon the consummation
of the  Merger and as set forth in the  Agreement,  Farmers'  shareholders  will
receive in exchange for each share of Farmers Common Stock, 2.266 shares of ACNB
Common Stock.

     The last  reported  sale  price of ACNB  Common  Stock as  reported  on the
over-the-counter  Electronic  Bulletin Board  Interdealer  System was $_____ per
share on November  __, 1998.  Consummation  of the Merger is  conditioned  upon,
among other things,  the approval of the Agreement by the requisite 66 2/3% vote
of Farmers' shareholders.

     All information set forth in this Proxy  Statement/Prospectus  that relates
to ACNB has been provided or verified by ACNB. All information  which relates to
Farmers has been provided or verified by Farmers.

Voting, Revocation and Solicitation of Proxies

     The  presence,  in person or by proxy,  of at least a majority of the total
number of shares of the Farmers Common Stock outstanding and entitled to vote on
the Record  Date,  November 9, 1998,  is required to  constitute a quorum at the
Meeting. As of the Record Date there were 248,000 shares of Farmers Common Stock
outstanding  and entitled to vote.  Shareholders  who execute proxies retain the
right to revoke them at any time. Unless revoked, the shares

                                       13

<PAGE>


represented  by proxies  will be voted at the  Meeting and all  adjournments  or
postponements thereof. Proxies may be revoked by:

     *    written notice to the Secretary of Farmers;

     *    the filing of a later  dated  proxy  prior to a vote being  taken on a
          particular proposal at the Meeting; or

     *    by attendance at the Meeting and voting in person.

     Your  attendance  alone  will not  revoke a proxy.  If you wish to revoke a
previously  written  proxy,  please give written notice of revocation to Farmers
Bancorp, Inc., One West Big Spring Avenue, P. O. Box 156, Newville, Pennsylvania
17241-0156, Attention: Carolyn Kough.

     If a quorum is not present at the time the Meeting is  convened,  or if for
any other  reason  Farmers  believes  additional  time should be allowed for the
solicitation  of proxies or for the  satisfaction of conditions to the Merger or
the transactions  contemplated  thereby,  Farmers may adjourn the Meeting with a
vote of the holders of a majority of the voting power represented by the Farmers
Common Stock present at the Meeting. If Farmers proposes to adjourn the Meeting,
the persons named in the enclosed proxy card will vote all shares for which they
have  voting  authority  in favor of the  adjournment.  A proxy  that  withholds
discretionary  authority  or that is voted  against the Merger will not voted in
favor of any adjournment or postponement of the Meeting.

     Proxies  solicited  by the  Farmers  Board  of  Directors  will be voted in
accordance with the directions  given in the proxies.  Where no instructions are
indicated,  proxies will be voted in favor of each of the proposals set forth in
this Proxy  Statement/Prospectus.  The proxy confers discretionary  authority on
the persons named as proxyholders to vote with respect to matters  incidental to
the conduct of the Meeting.  If any other  business is presented at the Meeting,
proxies will be voted by the proxyholders in their best judgment. Proxies marked
as  abstentions  will not be counted as votes cast. In addition,  shares held in
street  name that have been  designated  by brokers on proxy  cards as not voted
will not be counted as votes cast.  Proxies  marked as  abstentions or as broker
no-votes:

     *    will be treated as shares present for purposes of determining  whether
          a quorum is present; and

     *    will have the same effect as a vote against the Merger proposal.

     The cost of  soliciting  proxies  will be borne by  Farmers.  Farmers  will
reimburse  brokerage  firms and other  custodians,  nominees and fiduciaries for
reasonable  expenses  incurred  by  them  in  sending  proxy  materials  to  the
beneficial owners of Farmers Common Stock. In

                                       14

<PAGE>


addition to solicitations by mail, directors,  officers and regular employees of
Farmers may solicit  proxies  personally  or by telegraph  or telephone  without
additional compensation.

Voting Securities and Security Ownership

     Holders of record of Farmers  Common  Stock as of the close of  business on
the Record  Date are  entitled  to one vote for each share then held.  As of the
Record  Date,  there were  248,000  shares of Farmers  Common  Stock  issued and
outstanding  and  entitled to vote,  of which  approximately  _______  shares or
_____% were held by  directors  and  executive  officers of Farmers.  There were
approximately 248 shareholders of record of Farmers on the Record Date.

     The following  table sets forth, as of the Record Date, the persons who own
of record or who are known by the Board of Directors to be the beneficial owners
of more than five percent (5%) of the  Corporation's  outstanding  Common Stock.
Except as noted  below,  each holder has sole voting and  investment  power with
respect to shares of Farmers  Common Stock listed as  beneficially  owned by the
person or entity.

                               Shares Beneficially
Name and Address                   Owned (1)                 Percent of Class
- ----------------                  ---------                  ----------------

Myra M. Bistline                   15,180                        6.07%
c/o John Bistline
27 Goodyear Road
Carlisle, PA 17013

Dana P. Brandt                     18,088                        7.23%
39 Mill Road
Newville, PA 17241

Edgar S. Heberlig                  12,644                        5.05%
200 Mount Rock Road
Newville, PA 17241

Orrstown Financial Services, Inc.  13,980                        5.59%
P.O. Box 250
Orrstown, PA 17257
- -------------------------

(1)  The  securities  "beneficially  owed" by an  individual  are  determined in
     accordance with the definitions of "beneficial  ownership" set forth in the
     General Rules and Regulations of the Securities Exchange Commission and may
     include  securities  owned  by or for the  individual's  spouse  and  minor
     children  and  any  other  relative  who  has  the  same  home,  as well as
     securities to which the individual has or shares voting or investment power
     or has the right to  acquire  beneficial  ownership  within  60 days  after
     September 30, 1998. Beneficial ownership may be disclaimed as to certain of
     the securities.

                                       15

<PAGE>

     The  following  table  sets  forth as of the  Record  Date,  the amount and
percentage  of the Farmers  Common Stock  beneficially  owned by each  executive
officer,  each  director,  and all officers and directors of Farmers as a group.
All shares are individually owned unless otherwise indicated.

Name of Individual         Amount and Nature of
or Identity of Group   Beneficial Ownership (1) (2)   Percent of Class (11) (13)
- --------------------   ----------------------------   --------------------------

Current Class A Directors
(To serve until 1999)

Dana P. Brandt                  18,088 (2)                          7.24%
J. Thomas Derick                 2,760 (3)                          1.10%
Frank A. Reeder                  2,610                              1.04%

Current Class B Directors
(To serve until 2000)

Frank C. Egger                   2,510                              1.00%
Edgar S. Heberlig               12,644 (4)                          5.05%
Mervin J. Morrison               3,000 (5)                          1.20%

Current Class C Directors
(To serve until 1998)

W. Irvin Nelson                  8,720 (6)                          3.48%
Harry L. Wheeler                 3,690 (7)                          1.47%

All Officers and Directors
   as a Group (9 persons)       75,734                             23.28%
- -------------------------

(1)  The  securities  "beneficially  owned" by an individual  are  determined in
     accordance with the definitions of "beneficial  ownership" set forth in the
     General Rules and Regulations of the Securities and Exchange Commission and
     may include  securities owned by or for the  individual's  spouse and minor
     children  and  any  other  relative  who  has  the  same  home,  as well as
     securities to which the individual has or shares voting or investment power
     or has the right to  acquire  beneficial  ownership  within  60 days  after
     September 30, 1998. Beneficial ownership may be disclaimed as to certain of
     the securities.

(2)  Includes  6,602 shares held  individually  by his spouse.

(3)  Includes 760 shares held jointly with his spouse.

(4)  Includes  1,000  shares held jointly  with his spouse.

(5)  Includes  1,000  shares held jointly  with his spouse.

(6)  Includes 6,720 shares held jointly with his spouse.

(7)  Includes 730 shares held  jointly with his spouse.

(8)  Less than 1% unless otherwise indicated.


                                       16

<PAGE>




Other Matters

     The Farmers  Board of Directors is not aware of any business to come before
the   Meeting   other   than   those    matters    described   in   this   Proxy
Statement/Prospectus.  However, if any other matters should properly come before
the  Meeting  that  are  incidental  to the  matters  described  in  this  Proxy
Statement/Prospectus, Farmers intends that proxies in the accompanying form will
be voted in respect  thereof in  accordance  with the  judgment of the person or
persons voting the proxies.

Auditors of Farmers

     The firm of  Greenawalt  & Company,  P.C.  has been  appointed  as Farmers'
independent auditors for the year ended December 31, 1998. Greenawalt & Company,
P.C. is located at 400 West Main Street, Mechanicsburg, Pennsylvania 17055.

                             APPROVAL OF THE MERGER

     This section of the Proxy Statement/Prospectus describes the material terms
and provisions of the proposed Merger, including the principal provisions of the
Agreement and related transactions.  A copy of the Agreement is attached to this
Proxy  Statement/Prospectus  as Annex A. All  shareholders are urged to read the
Agreement in its entirety.

     The Agreement  provides that,  subject to the satisfaction or waiver (where
permissible)  of certain  conditions,  which are described more fully herein and
therein,  Farmers will be merged with,  into and under the charter of ACNB North
and FNB will become a second-tier wholly-owned subsidiary of ACNB. In connection
with  the  Merger,  each  outstanding  share of  Farmers  Common  Stock  will be
converted into the right to receive and become  exchangeable for 2.266 shares of
ACNB  Common  Stock plus cash in lieu of any  fractional  shares of ACNB  Common
Stock.

Background of the Merger, Reasons and Recommendation of the Board of Directors

     The Board of  Directors  of Farmers has for several  years,  as part of its
long-range planning practices,  periodically  reviewed and evaluated the various
strategic  options and  alternatives  available to Farmers.  In particular,  the
Board has considered  the relative  merits of maintaining  the  independence  of
Farmers  and FNB and of  merging  Farmers  and/or  FNB with a  larger  financial
institution in light of current  economic,  financial and regulatory  conditions
and  their  impact  on the  financial  services  industry.  The  Board  has also
considered the  desirability  of increasing the value and liquidity of the stock
held by shareholders by arranging a merger in which Farmers'  shareholders would
receive  publicly-traded  stock in a larger  banking  organization.  The Board's
primary  consideration  in taking the actions  that led to the  execution of the
Agreement was to provide a fair financial  return to  shareholders  and increase
the liquidity of their stock, while maintaining,  to the extent possible,  local
identity and autonomy for FNB in

                                       17

<PAGE>


order to serve Farmers' other constituencies, the community, and FNB's customers
and  employees.  The Board  concluded that in a rapidly  changing,  increasingly
competitive market for financial services,  Farmers can compete more effectively
as a part of a larger banking organization with more resources and a wider range
of products and services than those that Farmers currently offers.

     Through the Merger,  Farmers  believes that it can expand its resources and
its range of products  and services on an  accelerated  timetable as compared to
reliance on internal  growth.  In general,  Farmers is entering  into the Merger
because  it  believes  it can better  maximize  shareholders'  long-term  return
through an affiliation with a larger,  more diversified  financial  institution.
Farmers' Board of Directors  believes that ACNB's greater  resources will enable
FNB to offer expanded services to its customers and the communities it serves.

     In addition,  the Merger with ACNB will increase the liquidity of the stock
held by Farmers'  shareholders  by exchanging  it for stock in a larger  banking
organization.  Pursuant to the  Agreement,  ACNB has agreed to apply to the NASD
for  qualification  for quotation on the NASDAQ National Market System or NASDAQ
Small Cap Stocks, as appropriate, within 180 days of consummation of the Merger.
Neither  Farmers nor ACNB can assure that the ACNB Common Stock will be accepted
for listing by the NASDAQ.

     In considering the Merger,  Farmers' Board of Directors  considered,  among
other things discussed herein,  the financial terms of the Merger, the structure
of the transaction,  the historic and current financial performance of ACNB, the
commitment  of ACNB to the  communities  its  subsidiary  serves,  the operating
culture of ACNB, and the opinion of its financial  advisor as to the fairness of
the transaction, from a financial point of view, to shareholders.

     The  consideration  that you are to  receive  in the  Merger as a  Farmers'
shareholder  was  negotiated  by the Board of  Directors  of Farmers in light of
various factors, including Farmers' and ACNB's recent operating results, current
financial  condition and perceived future prospects.  GM&A has advised the Board
of Directors that, in its opinion,  the consideration to be received by Farmers'
shareholders  pursuant to the Merger is fair,  from a financial point of view. A
copy of the GM&A opinion dated as of the date of this Proxy Statement/Prospectus
is attached hereto as Annex B.

     The  Farmers  Board of  Directors  believes  that the Merger is in the best
interests of Farmers'  shareholders  and recommends  that Farmers'  shareholders
vote "FOR" approval of the Agreement.

Vote Required

     The  affirmative  vote of holders of 66 2/3% of the  outstanding  shares of
Farmers  Common Stock is required to approve the Agreement.  Farmers'  directors
and  executive  officers are expected to vote  substantially  all of the _______
shares held by them, representing

                                       18

<PAGE>

approximately  _______  percent of the Farmers  Common Stock  outstanding at the
Record  Date  and  entitled  to  vote  at the  Meeting,  "FOR"  approval  of the
Agreement.

Opinion of Financial Advisor

General

     Pursuant to an  engagement  letter  dated June 19, 1998,  (the  "Engagement
Letter")  the Farmers  Board  retained  GM&A to render  financial  advisory  and
investment  banking  services to Farmers in connection with the possible sale of
Farmers (the "Transaction").

     GM&A, as part of its investment  banking and bank consulting  business,  is
engaged in the valuation of financial  institution  securities  for a variety of
purposes, including mergers and acquisitions,  and the determination of adequate
consideration in merger and acquisition transactions. The Farmers Board selected
GM&A on the basis of its experience in and knowledge of the banking industry and
its ability to evaluate the fairness of the  Transaction  from a financial point
of view. GM&A acted  exclusively for the Farmers Board in rendering its fairness
opinion and has received fees from Farmers in rendering its fairness opinion and
has received  fees from Farmers in rendering  its  services.  There are no other
material  relationships  between GM&A, its affiliates  and  representatives  and
Farmers or its affiliates.

     The full text of the GM&A  Opinion  is  attached  as Annex B to this  Proxy
Statement/Prospectus  and is  incorporated  herein by reference.  We urge you to
read the GM&A  Opinion  in its  entirety  for a  description  of the  procedures
followed,   assumptions  made,   matters   considered  and   qualifications  and
limitations  on the  review  undertaken  by GM&A in  connection  therewith.  The
following  summary of the GM&A  Opinion is qualified in its entirety by the full
text of the GM&A Opinion.  The per share Merger  Consideration was determined by
negotiation between Farmers and ACNB and was not determined by GM&A.

     In rendering the GM&A Opinion, GM&A:

     *    reviewed the  historical  financial  performances,  current  financial
          positions and general prospects of Farmers and ACNB;

     *   reviewed the Agreement;

     *    reviewed the Proxy Statement/Prospectus;

     *    reviewed  and analyzed  the stock  market  performance  of Farmers and
          ACNB;

     *    studied and analyzed the operations,  historical  financial statements
          and future prospects of Farmers;


                                       19

<PAGE>

     *    reviewed  the  respective   history  of  dividends  paid  by  the  two
          institutions;

     *    considered  the terms and  conditions of the proposed  Transaction  as
          compared with the terms and conditions of comparable  bank mergers and
          acquisitions;

     *    met to discuss  with various  senior  officers of Farmers and ACNB the
          foregoing  as  well as  other  matters  it  believed  relevant  to its
          opinion; and

     *    conducted  such other  analyses,  studies and  investigations  as were
          deemed appropriate.

     GM&A  relied  without  independent   verification  upon  the  accuracy  and
completeness  of  all  the  financial  and  other  information  reviewed  by and
discussed  with it for  purposes  of its  opinion.  With  respect to the Farmers
financial forecasts reviewed by GM&A in rendering its opinion, GM&A assumed that
such financial  forecasts were reasonably  prepared on the basis  reflecting the
best currently available estimates and judgments of the management of Farmers as
to the future financial performance of Farmers. GM&A did not make an independent
evaluation  or  appraisal  of the assets  (including  loans) or  liabilities  of
Farmers or ACNB nor was it furnished with any such appraisal.  GM&A also did not
independently  verify,  and has relied on and assumed,  that all  allowances for
loan  losses set forth in the balance  sheets of Farmers and ACNB were  adequate
and complied fully with all applicable law,  regulatory policy and sound banking
practice as of the date of such financial statements.

     In connection with rendering the GM&A Opinion,  GM&A performed a variety of
financial  analyses.  Although the evaluation of the fairness,  from a financial
point  of view of the  Transaction  and of the  consideration  to be paid in the
Transaction  was to some extent a  subjective  one based on the  experience  and
judgment of GM&A and not merely the result of mathematical analysis of financial
data, GM&A principally relied on the financial evaluation methodology summarized
below in its determinations.  GM&A believes its analyses must be considered as a
whole and that  selecting  portions of such  analyses and factors  considered by
GM&A  without  considering  all  such  analyses  and  factors  could  create  an
incomplete view of the process underlying GM&A's Opinion. In its analysis,  GM&A
made  numerous  assumptions  with  respect to  business,  market,  monetary  and
economic conditions,  industry performance and other matters,  many of which are
beyond Farmers' and ACNB's control.  Any estimates  contained in GM&A's analyses
are not  necessarily  indicative  of  future  results  or  values,  which may be
significantly more or less favorable than such estimates.

     The  following  is a summary of  selective  analyses  prepared  by GM&A and
analyzed by GM&A in connection with the GM&A Opinion.


                                       20

<PAGE>

     Comparable Company Analysis

     GM&A compared selected  financial and operating data for Farmers with those
of a peer group of rural banking  organizations  with assets between $25 and $50
million.  This data included,  but was not limited to: return on average assets,
return on average  equity,  certain  capital  adequacy  ratios and certain asset
quality  ratios.   GM&A  excluded   securities   gains  and  other  items  of  a
non-recurring nature in computing profitability ratios. The analysis showed that
Farmers'  return on average assets was 1.3% compared to the peer group median of
1.2%; its return on equity was 10.4% compared to the peer group median of 13.3%;
its  leverage  ratio was 13.1%  compared to the peer group  median of 8.9%;  its
non-performing  loans  measured  1.0% of total loans  compared to the peer group
median of 0.8%;  and its loan loss reserve as a percentage of  nonaccrual  loans
was 77% compared to the peer group median of 696%.

     GM&A compared  selected  financial and operating data for ACNB with a group
of Pennsylvania,  Maryland and Virginia banking  organizations that consisted of
F&M Bancorp, F&M National  Corporation,  FCNB Corp., First Virginia Banks, Inc.,
Harleysville National Corporation,  JeffBanks,  Inc., Keystone Financial,  Inc.,
MainStreet  BankGroup,   Mason-Dixon  Bancshares,  Inc.,  Mercantile  Bankshares
Corporation,  National Penn Bancshares,  Inc., Provident Bankshares Corporation,
Sandy Spring Bancorp,  Inc.,  Sterling  Financial  Corporation,  and Susquehanna
Bancshares,  Inc. This data included,  but was not limited to: return on average
assets,  return on average equity,  certain capital  adequacy ratios and certain
asset  quality  ratios.  GM&A  excluded  securities  gains and other  items of a
non-recurring nature in computing profitability ratios. The analysis showed that
ACNB's  return on average  assets was 1.6%  compared to the peer group median of
1.2%; its return on equity was 14.2% compared to the peer group median of 12.6%;
its ratio of equity to assets was 11.2%  compared  to the peer  group  median of
8.6%; its non-performing loans measured 1.0% of total loans compared to the peer
group median of 0.9%;  and its loan loss reserve as a percentage  of  nonaccrual
loans was 96% compared to the peer group median of 180%.

     GM&A  also  compared  stock  market  data for ACNB  with the same  group of
banking  organizations.  The analysis  showed that the average  ratio of trading
price to tangible  book value per share for the expanded  peer group was 271% as
compared  to 276% for ACNB.  In  addition,  the group's  average  stock price to
earnings  per share  before  non-recurring  items was 21.5  compared to 20.2 for
ACNB.

     Analysis of Selected Merger and Acquisition Transactions

     GM&A  compared  the  multiples  of  tangible  book value and latest  twelve
months'  earnings of the  Transaction  with the multiples  associated  with bank
mergers in  Pennsylvania  that were announced since September 1, 1997. GM&A also
compared the multiples of book value and latest twelve  months'  earnings of the
Transaction  with the  multiples  associated  with selected  recently  announced
acquisitions  of banking  institutions  with total assets less than $75 million.
However, no company or transaction used in any of these analyses is identical to

                                       21

<PAGE>


Farmers or ACNB. Accordingly, an analysis of the results of the foregoing is not
mathematical;   rather,  it  involves  complex   considerations  and  judgements
concerning  the  differences in financial and operating  characteristics  of the
companies and other factors that would affect the public  trading  values of the
companies or company to which they are being compared.

     Discounted Dividend Analysis

     Using discounted dividend analysis, GM&A estimated the present value of the
future dividend streams that Farmers could produce over a five-year period under
various earnings growth assumptions.  GM&A also estimated the terminal value for
Farmers by applying an earnings  multiple of twenty.  The  dividend  streams and
terminal  value were  discounted to determine  the present value using  discount
rates ranging from 10.8% to 12.8%.

     GM&A also used discounted  dividend  analysis to estimate the present value
of the future dividend  streams that ACNB could produce over a five-year  period
under various  earnings  growth  assumptions.  GM&A also  estimated the terminal
value for ACNB Common  Stock by applying  an  earnings  multiple of twenty.  The
dividend  streams and terminal  value were  discounted  to determine the present
value using discount rates ranging from 10.8% to 12.8%.

Pro Forma Merger Analysis

     GM&A  analyzed,  using  projections  and  discussions  with  managements of
Farmers and ACNB, certain pro forma effects resulting from the Transaction based
on the proposed  consideration.  The  analysis  examined  the  projected  impact
(including  management's  estimates of transaction  related savings) on earnings
per share and book value per share of ACNB.

     In reaching its opinion as to fairness,  none of the analyses  performed by
GM&A was assigned a greater  significance by GM&A than any other. As a result of
its  consideration  of  the  aggregate  of  all  factors  present  and  analyses
performed, GM&A reached the conclusion,  and opines, that the consideration,  as
set forth in the Agreement,  is fair, from a financial point of view, to holders
of Farmers' securities.

     In connection with delivering the GM&A Opinion, GM&A updated certain of its
analyses and reviewed the  assumptions on which such analyses were based and the
factors considered therewith.

     GM&A, as part of its investment  banking business,  is regularly engaged in
the valuation of assets,  securities  and  companies in connection  with various
types of asset and securities  transactions,  including  mergers,  acquisitions,
private  placements,  and  valuation  for  various  other  purposes  and  in the
determination of adequate consideration in such transactions.

     In delivering its opinion, GM&A assumed that in the course of obtaining the
necessary  regulatory  and  governmental  approvals  for  the  Transaction,   no
restrictions will be imposed on

                                       22

<PAGE>

Farmers or ACNB that would have a material  adverse  affect on the  contemplated
benefits of the  Transaction.  GM&A also  assumed that there would not occur any
change in  applicable  law or  regulation  that would  cause a material  adverse
change in the prospects or operations of ACNB after the Effective Date. Pursuant
to the terms of the  Engagement  Letter,  Farmers has paid GM&A  $20,000 and has
agreed to reimburse GM&A for its reasonable  out-of-pocket expenses.  Whether or
not the Merger is consummated,  Farmers has agreed to indemnify GM&A and certain
related persons against  certain  liabilities  relating to or arising out of its
engagement.

     The  full  text of the  Opinion  of  GM&A,  as of the  date  of this  Proxy
Statement/Prospectus,  which sets forth assumptions made and matters considered,
is attached hereto as Annex B to this Proxy Statement/Prospectus. We urge you to
read the  Opinion  in its  entirety.  GM&A's  Opinion  is  directed  only to the
consideration  to be received by  shareholders  in the  Transaction and does not
constitute  a  recommendation  to you as to how you should  vote at the  Special
Meeting.

Dissenters' Rights

General

     Pursuant to the BCL,  you, as a holder of Farmers  Common  Stock,  have the
right to dissent  from the Merger and to obtain  payment of the "fair  value" of
your shares in the event that the Merger is consummated.

     If you contemplate  exercising  your right to dissent,  we urge you to read
carefully  the  provisions  of Subchapter D of Chapter 15 of the BCL attached to
this Proxy  Statement/Prospectus  as Annex C. The  following is a summary of the
steps to be taken if you want to exercise  your right to dissent,  and should be
read in connection with the full text Subchapter D of Chapter 15 of the BCL. You
must take each step in the  indicated  order and in strict  compliance  with the
applicable  provisions  of the  statute  in order to  perfect  your  dissenters'
rights.  Your  failure to comply  with the  aforesaid  steps will result in your
receiving the consideration  contemplated by the Agreement in the event that the
Merger is consummated.

     Any written notice or demand,  required in connection  with the exercise of
dissenters' rights, before the Effective Date, must be sent to Farmers Bancorp.,
Inc.  at One West Big  Spring  Avenue,  P.O.  Box  156,  Newville,  Pennsylvania
17241-0156,  Attention:  Carolyn Kough and after the Effective Date must be sent
to  ACNB  Corporation,   675  Old  Harrisburg  Road,  Gettysburg,   Pennsylvania
17325-0129, Attention: Ronald L. Hankey, President.

Fair Value

     The term "fair  value"  means the value of a share of Farmers  Common Stock
immediately  before  consummation of the Merger taking into account all relevant
factors,  but excluding any  appreciation or depreciation in anticipation of the
Merger.


                                       23

<PAGE>

Notice of Intention to Dissent

     If you wish to dissent, you must:

     *    file with Farmers,  prior to the vote of shareholders on the Merger at
          the Meeting,  a written  notice of intention to demand  payment of the
          fair  value of your  shares of Farmers  Common  Stock if the Merger is
          effected;

     *    effect no change in your beneficial  ownership of Farmers Common Stock
          from the date of the notice through the Effective Time; and

     *    refrain  from voting your  Farmers  Common  Stock for  approval of the
          Agreement.

Neither a proxy nor a vote against  approval of the Merger will  constitute  the
necessary written notice of intention to dissent.

     Notice to Demand Payment

     If the Agreement is approved by the required vote of shareholders,  Farmers
or ACNB will mail a notice to all dissenters who gave due notice of intention to
demand payment and who refrained from voting for approval of the Agreement.  The
notice will state where and when a written  demand for payment  must be sent and
where certificates for Farmers Common Stock must be deposited in order to obtain
payment.  The notice  will  include a form for  demanding  payment and a copy of
Subchapter  D of Chapter 15 of the BCL.  The time set for  receipt of the demand
for payment and deposit of stock certificates will be not less than 30 days from
the date of mailing of the notice.

     Failure to Comply with Notice to Demand Payment, etc.

     If you fail to timely demand  payment or fail to timely  deposit your share
certificates,  as required  by the notice,  you will  forfeit  your  dissenters'
rights and you will  receive  shares of ACNB  Common  Stock,  as  determined  in
conformity with the Agreement.

     Payment of Fair Value of Shares

     Promptly  after the Effective  Time,  or upon timely  receipt of demand for
payment if the Merger  already has been  consummated,  ACNB will either remit to
dissenters who have made demand and have deposited their stock  certificates the
amount that ACNB  estimates to be the fair value of the Farmers  Common Stock or
give written  notice that no such  remittance is being made.  The  remittance or
notice will be accompanied by:

                                       24

<PAGE>

     *    a closing  balance  sheet and  statement  of income of  Farmers  for a
          fiscal  year  ending  not  more  than 16  months  before  the  date of
          remittance  or  notice  together  with the  latest  available  interim
          financial statements;

     *    a statement  of the  estimate of the fair value of the Farmers  Common
          Stock; and

     *    a notice of the right of the dissenter to demand supplemental  payment
          under the BCL  accompanied  by a copy of Subchapter D of Chapter 15 of
          the BCL.

     Estimate by Dissenter of Fair Value of Shares

     If a dissenter believes that the amount stated or remitted is less than the
fair value of the Farmers  Common  Stock,  the dissenter may send to ACNB his or
her own estimate of the fair value of the Farmers  Common Stock,  which shall be
deemed to be a demand  for  payment  of the  amount of the  deficiency.  If ACNB
remits payment of its estimated value of a dissenter's  Farmers Common Stock and
the  dissenter  does not file his or her own  estimate  within 30 days after the
mailing by ACNB of its  remittance,  the  dissenter  will be entitled to no more
than the amount remitted by ACNB.

     Valuation Proceedings

     If any demands for payment remain unsettled within 60 days after the latest
to occur of:

     *    the Effective Date;

     *    timely receipt by Farmers or ACNB of any demands for payment; or

     *    timely  receipt by Farmers or ACNB of any  estimates by  dissenters of
          the fair value.

Then, ACNB may file in the Court of Common Pleas of Dauphin County (the "Dauphin
County  Court") an  application  requesting  that the fair value of the  Farmers
Common Stock be determined by the Dauphin  County  Court.  If this happens,  all
dissenters,  wherever  residing,  whose demands have not been settled,  shall be
made parties to the proceeding as in an action against their shares,  and a copy
of the application will be served on each such dissenter.

     If ACNB were to fail to file such an  application,  then any dissenter,  on
behalf of all  dissenters  who have made a demand and who have not settled their
claim  against  ACNB,  may file an  application  in the name of ACNB at any time
within the 30-day  period after the  expiration of the 60-day period and request
that the fair value be  determined by the Dauphin  County Court.  The fair value
determined by the Dauphin County Court may, but need not, equal the  dissenters'
estimates of fair value. If no dissenter  files such an  application,  then each
dissenter  entitled to do so shall be paid the estimate of the fair value of the
Farmers

                                       25

<PAGE>


Common  Stock and no more,  and may bring an action to  recover  any  amount not
previously remitted, plus interest at a rate the Dauphin County Court finds fair
and equitable.

     ACNB intends to negotiate in good faith with any  dissenting  shareholders.
If after  negotiation  a claim  cannot be settled,  then ACNB intends to file an
application  requesting  that the  fair  value of the  Farmers  Common  Stock be
determined by the Dauphin County Court.

     Costs and Expenses

     The costs and expenses of any valuation  proceedings  in the Dauphin County
Court,  including  the  reasonable  compensation  and expenses of any  appraiser
appointed  by the Dauphin  County  Court to recommend a decision on the issue of
fair value,  will be determined by the Dauphin County Court and assessed against
ACNB  except  that any part of the costs and  expenses  may be  apportioned  and
assessed by the Dauphin  County Court against all or any of the  dissenters  who
are  parties  and whose  action in  demanding  supplemental  payment the Dauphin
County  Court finds to be  dilatory,  obdurate,  arbitrary,  vexatious or in bad
faith.

Terms of the Merger

     We discuss the material terms of the Agreement  below. Our description does
not purport to be complete  and is qualified in its entirety by reference to the
Agreement,   a  copy  of  which   is   attached   as  Annex  A  to  this   Proxy
Statement/Prospectus  and is  incorporated by reference  herein.  We urge you to
read the entire Agreement.

     Effect of the Merger

     Pursuant  to the  Agreement,  ACNB North will merge with and into  Farmers,
with Farmers as the surviving entity, as a result of which Farmers will become a
direct, wholly-owned subsidiary of ACNB, and FNB, a national bank, will become a
second-tier  subsidiary of ACNB.  The name of the Surviving  Corporation  in the
Merger will be "ACNB North, Inc."

     Exchange Ratio

     Under the terms of the Agreement on the Effective  Date,  each  outstanding
share of Farmers  Common Stock will become the right to receive  2.266 shares of
ACNB Common Stock.

     At the Effective Time (as defined in the Agreement,  the "Effective Time"),
each share of Farmers  Common  Stock issued and  outstanding  (other than shares
held by those who are exercising appraisal rights pursuant to the BCL and shares
held by ACNB other than shares held in a fiduciary  capacity or in  satisfaction
of a debt previously contracted) shall become and be converted into the right to
receive 2.266 shares of ACNB Common Stock.  As of the Effective Time, each share
of Farmers Common Stock held by ACNB, other than shares held in a fiduciary

                                       26

<PAGE>


capacity or in satisfaction of a debt previously  contracted,  will be canceled,
and no exchange or payment will be made with respect thereto.

     The shares of common  stock of ACNB  North and FNB  issued and  outstanding
immediately  prior to the Effective Time shall remain  outstanding and unchanged
after  the  Merger,  and  shall  thereafter  constitute  all of the  issued  and
outstanding  shares of the capital stock of the Surviving  Corporation  and FNB,
respectively. At such time, all of the capital stock of FNB will be owned by the
Surviving Corporation and all of the shares of the Surviving Corporation will be
owned by ACNB.

     If prior to the Effective Date, the outstanding shares of ACNB Common Stock
are increased or decreased  through a  reclassification,  stock dividend,  stock
split or reverse stock split,  or other similar change,  appropriate  adjustment
will be made to the Exchange Ratio.

     Fractional Shares

     We will not issue fractional shares of ACNB Common Stock. ACNB will furnish
to you, if you are  otherwise  entitled to a  fractional  share,  a check for an
amount  of  cash  equal  to  such  fraction  of a share  of  ACNB  Common  Stock
represented by the  certificates  so surrendered in accordance with the Exchange
Ratio.

     Representations and Warranties

     The representations and warranties of ACNB, ACNB North, Farmers and FNB are
set forth in Article III of the  Agreement.  We recommend  that you read Article
III in its entirety.  The  representations  and warranties  relate,  among other
things, to:

     *    representations  as to  corporate  existence  and  authority  and  the
          ability of each party to carry out the transactions as contemplated by
          the Agreement;
  
     *    capitalization;

     *    subsidiaries;

     *    no violations of law;

     *    regulatory reports and financial statements;

     *    the absence of certain changes or events;

     *    the absence of material litigation not otherwise disclosed;

     *    the absence of regulatory actions;

     *    labor and employee benefits matters;

     *    environmental matters;

     *    board action;

     *    fees;

     *    compliance with laws;

     *    taxes, material contracts and agreements;

     *    regulatory and capital compliance;

                                       27

<PAGE>

     *   fully paid assessments;

     *    Year 2000 compliance except as otherwise disclosed;  and

     *    information to be provided in the Proxy Statement/Prospectus.

Farmers and FNB have made additional representations as to:

     *    the status of title to assets;

     *    the adequacy of allowances for losses on loans;

     *    the inapplicability of certain anti-takeover provisions;

     *    the material interests of certain persons;

     *    insurance;

     *    dividends;

     *    books and records;

     *    labor matters;

     *    fairness opinions;

     *    fidelity bonds;

     *    the condition of tangible assets; and

     *    loans by FNB.

On the  Effective  Date,  ACNB,  Farmers and FNB must each  present to the other
certificates  evidencing  the continued  accuracy of their  representations  and
warranties.

     Covenants

     The Agreement also contains certain  affirmative and negative  covenants of
all of the parties. Farmers has agreed, among other things, that:

     *    it shall  direct  and use its best  efforts  to  cause  its  officers,
          directors,  employees,  agents and  representatives  not to  initiate,
          solicit  or  encourage  inquiries  regarding  the making of any merger
          proposal or any  proposal to purchase any  significant  portion of the
          assets or equity  securities  of  Farmers  or FNB and,  subject to the
          fiduciary obligations of its directors as determined upon consultation
          with counsel, it will not engage in any negotiations or discussions or
          provide  any  confidential  information  in  connection  with any such
          proposal;

     *    it  will  cooperate  with  ACNB  in  the  preparation  of  this  Proxy
          Statement/Prospectus   and  the  filing  thereof  as  part  of  ACNB's
          Registration  Statement  and  preparation  of all required  regulatory
          applications;

     *    it will take all required action to call the Meeting;


                                       28

<PAGE>

     *    subject to the fiduciary  duties of the Farmers Board of Directors and
          the  receipt  of an  updated  fairness  opinion as of the date of this
          Proxy  Statement/Prospectus,  it will use its best  efforts  to obtain
          approval of the Agreement; and

     *    it will furnish to ACNB a list of all persons  known to be  affiliates
          of Farmers within the meaning of Rule 145 under the Securities Act and
          will use its best  efforts  to cause  any such  person  to  deliver  a
          written  agreement  providing that such person will not sell,  pledge,
          transfer  or  otherwise  dispose  of the shares of ACNB  Common  Stock
          received  pursuant  to  the  Merger  except  in  compliance  with  the
          Securities Act and the rules and regulations thereunder and after such
          time as  financial  results  covering at least 30 days of  post-merger
          combined operations have been published.

     During the period prior to the effectiveness of the Merger, Farmers and FNB
are required to provide ACNB and its  representatives  with reasonable access to
their  respective  books,   records,   employees,   properties  and  such  other
information  as ACNB may  reasonably  request and to provide ACNB with copies of
their respective financial statements periodically.

     ACNB is  required  to  provide  Farmers  and FNB with  copies of all of its
filings  with  the  Commission  pursuant  to the  Exchange  Act,  together  with
applications filed with regulatory authorities and certain other information.

Conduct of Business Pending the Merger

     Farmers,  FNB,  ACNB and ACNB North have all agreed to cooperate  with each
other in completing the  transactions  described in the Agreement and to refrain
from taking or making any commitment to take any actions that would cause any of
the  representations  or  warranties of each party as set forth in the Agreement
not to be true or correct in all material respects.

     Pursuant  to the  Agreement,  Farmers  and FNB have each agreed to carry on
their business in the usual, regular and ordinary course of business, consistent
with past  practices  and to  maintain  and  preserve  intact  their  respective
business  organizations,   assets,  leases,  properties,  advantageous  business
relationships  and other items,  to use their  reasonable  efforts to retain the
services of their officers and key employees,  to refrain from taking any action
which, to their knowledge, could materially delay or adversely affect Farmers or
FNB in general or their ability to obtain any approvals,  consents or waivers of
any governmental  authorities  necessary for the consummation of the Merger, and
to not knowingly  take any action that is  reasonably  likely to have a Material
Adverse Effect (as defined in the Agreement) on Farmers.

     In  addition,  during the period  pending the Merger,  Farmers and FNB have
each agreed that they will:


                                       29

<PAGE>

     *    use  all  reasonable  efforts  to  carry  on the  ordinary  course  of
          business,  consistent with customary  business  practices of prudently
          managed banks;

     *    use  all   reasonable   efforts  to  preserve  the  present   business
          organization,  retain  the  services  of their  present  officers  and
          employees,  maintain  good  relationships  with their  employees,  and
          maintain their relationships with their customers and suppliers;

     *    maintain all of their properties (including real and tangible personal
          properties) in good repair and condition;

     *    use all reasonable efforts to preserve or collect any and all of their
          claims or causes of actions;

     *    keep in force and effect all insurance policies;

     *    perform  and  maintain  all  material   obligations   under   material
          agreements,  contracts,  instruments  and other  commitments  to which
          either  Farmers  or FNB is a  party  to or may be  bound  by or  which
          relates to or effects  properties,  assets and  business of Farmers or
          FNB;

     *    maintain  all books of  accounts  and other  records  in the  ordinary
          course of business;

     *    comply in all material respects with all statutes,  laws,  ordinances,
          rules and regulations of federal,  state,  county, local and municipal
          governments;

     *    refrain  from  amending  the  Articles of  Incorporation  or Bylaws of
          either Farmers or FNB;

     *    refrain  from  entering  into  or  assuming  any  material   contract,
          incurring any material liability or obligation, acquiring or disposing
          of any property or asset, or engaging in any transaction or subjecting
          any of Farmers'  or FNB's  property  or assets to any  material  lien,
          claim, charge, or encumbrance of any kind;

     *    refrain from taking or permitting the taking of any action which would
          constitute a breach of any  representation,  warranty or covenant,  as
          set forth in the Agreement;

     *    refrain from declaring, setting aside or paying any dividend or making
          any other  distribution in respect to Farmers' or FNB's capital stock,
          except as provided in the Agreement;


                                       30

<PAGE>


     *    refrain from authorizing,  purchasing,  issuing or selling  (including
          derivatives)  debt or equity  securities of Farmers' or any securities
          convertible into Farmers' Common Stock;

     *    refrain from increasing the rate of compensation of, paying bonuses or
          severance compensation to, or entering into any employment, severance,
          deferred  compensation or other agreement with any officer,  director,
          employee  or  consultant  of Farmers  or FNB,  beyond  general  salary
          increases to individual  employees in the ordinary  course of business
          and consistent with past practices;

     *    refrain from  entering  into certain  related  party  transactions  as
          contemplated  in the  Agreement  (this does not include  related party
          transactions stemming from the extensions of credit made in accordance
          with all applicable  laws,  regulations  and rules and in the ordinary
          course of business);

     *    refrain from  effecting any  capitalization,  reclassification,  stock
          dividend, stock split, or like changes in the capitalization of either
          Farmers or FNB;

     *    refrain from  entering  into or  substantially  modifying any employee
          benefit, incentive, or welfare contract, or plan or arrangement or any
          trust  agreement  related to employee  benefits,  in respect to any of
          Farmers' or FNB's directors, officers or employees;

     *    refrain from merging with or into,  or  consolidating  with,  or being
          purchased   or   acquired   by,  any  other   corporation,   financial
          institution,  entity or person (or agreeing to such a transaction)  or
          permitting (or agreeing to permit) any like corporate transaction;

     *    refrain  from  acquiring  control  over  any  other  firm,   financial
          institution, corporation or organization or creating new subsidiaries;

     *    refrain  from   soliciting  or  encouraging   inquiries  or  proposals
          concerning any acquisition or purchase of all or a substantial  equity
          interest  or  portion  of the  assets in or of  Farmers  or FNB or any
          business  combination  with Farmers or FNB, other than as contemplated
          by the Agreement;

     *    refrain from authorizing or permitting any officer, director, agent or
          affiliate of it to do any of the above;

     *    refrain from changing any method, practice or principal of accounting,
          as may be required by generally accepted accounting  principles or any
          applicable  regulations  or partake in any actions that would preclude
          satisfaction of the conditions as

                                       31

<PAGE>

          contained in the Agreement relating to financial  accounting treatment
          of the merger;

     *    refrain from making any loans or other credit facility  commitments in
          excess of $100,000  (including without limitations lines of credit and
          letters  of  credit)  to any  affiliate  or  compromising,  extending,
          renewing or modifying any new or any such outstanding commitment;

     *    refrain from entering into any swap or similar  commitment,  agreement
          or arrangement  that is not  consistent  with past practices and which
          increases  the credit or interest  rate risk over  levels  existing as
          those of December 31, 1997;

     *    refrain from entering into any  derivative,  cap or floor,  or similar
          agreement  except in the ordinary  course of business  and  consistent
          with past practices;

     *    refrain from entering into any participation arrangements or proposals
          of extensions of credit in excess of $250,000 or renewing,  extending,
          or modifying any outstanding participation arrangements or approvals;

     *    refrain  from  selling,   exchange  or  otherwise   disposing  of  any
          investment  securities  or loans  that  are  held  for  sale  prior to
          scheduled  maturity  and other than  pursuant to policies  agreed upon
          from time to time by the parties;

     *    refrain from  purchasing  any security for investment not rated "A" or
          higher by either Standard & Poors or Moody's Investor Services;

     *    refrain from waiving, releasing,  granting, or transferring any rights
          of value or modifying or changing in any material respect any existing
          agreement  to  which  Farmers  or FNB is a  party,  other  than in the
          ordinary course of business consistent with past practices; or

     *    refrain  from  knowingly  taking  any  action  that  would,  under any
          statute,  regulation  or  administrative  practice  of any  regulatory
          agency, materially or adversely effect the ability of any party to the
          Agreement to obtain any required  approvals  for  consummation  of the
          transaction.

     The  respective  obligations  of the parties to effect the Merger  shall be
subject to the satisfaction or waiver of the following  common  conditions prior
to the Effective Time:

     *    all  of  the  transactions  contemplated  by the  Agreement  shall  be
          approved  by the  requisite  vote of the  shareholders  of  Farmers in
          accordance with applicable law;


                                       32

<PAGE>

     *    the parties shall have procured all regulatory approvals,  consents or
          waivers  of  governmental  authorities,   or  other  persons  who  are
          necessary or appropriate to consummate the transaction contemplated by
          the  Agreement  and no such  approval  shall  impose any  condition or
          requirement  that, in the opinion of the Boards of Directors of either
          ACNB  or  ACNB  North,   renders  the   consummation   of  the  Merger
          inadvisable;

     *    all  requirements  subscribed by law which are necessary to consummate
          the transactions contemplated by the Agreement have been satisfied;

     *    no  parties  subject to the  Agreement  shall be subject to any order,
          common   decree  or   injunction  of  court  or  agency  of  competent
          jurisdiction,  which  enjoins or  prohibits  the  consummation  of any
          transaction  contemplated  by  the  Agreement,  and no  litigation  or
          proceeding  shall  be  pending  against  any of the  parties  or their
          subsidiaries brought by any governmental agency seeking to prevent the
          consummation of the transactions contemplated by the Agreement;

     *    no statute, rule, regulation,  order,  injunction or decree shall have
          been enacted,  entered,  promulgated  or enforced by any  governmental
          authority which prohibits, restricts or makes illegal the consummation
          of any of the transactions contemplated by the Agreement;

     *    the ACNB Common Stock to be issued  pursuant to the Agreement shall be
          duly  registered  under  Federal  Securities  laws and  registered  or
          qualified  under  securities or "Blue Sky Laws" of all states in which
          such  action  is  required   for  the  issuance  of  such  shares  and
          distribution to Farmers' shareholders entitled to receive such shares;
          or

     *    receipt  of a  favorable  ruling  from the  Internal  Revenue  Service
          ("IRS"),  an opinion of Shumaker  Williams,  P. C. or opinion  from an
          accounting  firm  acceptable  to  ACNB  to  the  tax  effects  of  the
          transactions  contemplated  under the  Agreement  (in the event that a
          ruling is sought from IRS,  Farmers and ACNB shall  cooperate and each
          shall  furnish  to the  other  and to the  IRS  such  information  and
          representations  deemed  necessary  or  advisable by ACNB and Farmers'
          counsel).

     The  obligations  of ACNB and ACNB  North to  effect  the  Merger  shall be
subject to the  satisfaction or waiver of the following  conditions prior to the
Effective Time:

     *    all of Farmers' and FNB's  representations and warranties as contained
          in the  Agreement  are true and correct in all material  respect as of
          the Effective Date;


                                       33

<PAGE>

     *    Farmers and FNB shall have performed  each of the covenants  under the
          Agreement;

     *    an "agreed upon  procedures"  letter dated the Effective Date, in form
          and  substance  satisfactory  to ACNB,  shall be  furnished to ACNB by
          Greenawalt  &  Company,  P.C.,  or such  other  accounting  firm as is
          acceptable to the parties;

     *    Farmers or FNB shall not  experience an event which may  reasonably be
          expected  to result in a Material  Adverse  Effect (as  defined in the
          Agreement) on the financial condition, properties, assets, business or
          results of operations of Farmers or FNB;

     *    as of  the  date  of  closing,  the  Merger  shall  meet  all  of  the
          requirements  for  pooling  of  interest  accounting  treatment  under
          generally  accepted  accounting  principles and under the rules of the
          SEC;

     *    ACNB shall receive an executed  counterpart of an affiliates agreement
          by the persons indicated in the Agreement and in the form contemplated
          by ACNB;

     *    prior to  Closing,  all issued and  outstanding  options,  warrants or
          rights to acquire any equity  interest in either  Farmers or FNB shall
          have been canceled and no compensation or other rights will be payable
          or  exchangeable  in the Merger in respect  to any such  rights  which
          remain unexercised at the Effective Time;

     *    no more than  seven  (7%)  percent  (17,360  shares) of the issued and
          outstanding  shares of Farmers shall have  exercised  their  statutory
          appraisal or Dissenters' Rights;

     *    no environmental problem of the kind contemplated by the Agreement and
          not previously disclosed in the Annex to the Agreement shall have been
          discovered  which would or which could materially and adversely effect
          the  condition  financially  or otherwise of the assets,  liabilities,
          business, operations or future prospects of Farmers or FNB;

     *    within sixty (60) days of the execution of the  Agreement,  ACNB shall
          have  determined  that the  medical,  health,  insurance  and employee
          benefit  plans or  programs  of Farmers  and/or FNB do not contain any
          provisions or clauses which would,  upon  assumption by ACNB,  require
          ACNB to provide  benefits or incur  costs in excess of those  provided
          for or paid by ACNB to or on behalf of its existing employees;

     *    within sixty (60) days of the execution of the  Agreement,  ACNB shall
          have  established to their  satisfaction  that Farmers'  balance sheet
          fairly represents the

                                       34

<PAGE>

          financial condition,  assets and liabilities of Farmers as of June 30,
          1998,  and that since June 30, 1998,  there have not been any material
          or adverse changes in the condition of Farmers or FNB; and

     *    all litigation pending against Farmers or FNB which, in the aggregate,
          would have a Material  Adverse Effect (as defined in the Agreement) on
          Farmers' consolidated operations or future prospects,  shall have been
          settled or otherwise resolved on terms satisfactory to ACNB.

     The  obligations  of Farmers  to effect the Merger  shall be subject to the
satisfaction or waiver of the following conditions prior to the Effective Time:

     *    all  of  ACNB's  and  ACNB  North's  representations,  warranties  and
          covenants  shall be true and correct in all  material  respects on the
          Effective  Date and ACNB and ACNB North shall have  performed  each of
          the covenants as required by the Agreement;

     *    there  shall  not  occur  any  change  in  the  financial  conditions,
          properties,  or  business  or  results of  operations  of ACNB or ACNB
          North,  which  might  reasonably  be  expected to result in a Material
          Adverse  Effect (as defined in the  Agreement) on ACNB or the material
          subsidiaries taken as a whole;

     *    the status of all pending litigation that might reasonably be expected
          to result in a Material  Adverse  Effect (as defined in the Agreement)
          on  ACNB or the  material  subsidiaries  taken  as a  whole  shall  be
          satisfactory to Farmers; and

     *    Farmers shall have received both a satisfactory  fairness opinion from
          Garland,  McPherson and  Associates no later than the mail date of the
          Proxy   Statement/Prospectus   completed   in   connection   with  the
          contemplated  transactions  and a  certificate  stating  the number of
          whole shares of ACNB and cash payable for fractional  shares  required
          to complete the  contemplated  transactions  shall be delivered to the
          Exchange Agent (as defined in the Agreement).

     ACNB has  also  agreed  that it will  not  knowingly  take  any  action  or
knowingly  cause  its  material  subsidiaries  to take any  action  which  would
materially  adversely  affect  or delay its  ability  to  obtain  any  necessary
approvals,  consents or waivers of any governmental  authority  required for the
transactions  described in the Agreement or that is reasonably  likely to have a
material adverse effect on ACNB, on a consolidated basis.

     Dividends

     The Agreement provides that Farmers shall not declare, pay or set aside any
dividend  or other  distribution  in  respect  of its  capital  stock  except in
conformity with past practice as to the

                                       35

<PAGE>


amount and timing of such  dividends,  with  increases in  conformity  with past
practices, it being understood on the basis of Farmers'  representations of past
practice that a dividend of $0.14 per share for the first quarter of 1998, $0.16
per share for the second quarter of 1998,  $0.17 per share for the third quarter
of 1998 and is  consistent  with the past  practice  of Farmers as to amount and
timing of dividends.

     Conditions Precedent

     In addition to the approval by the  shareholders,  the Merger is contingent
upon the satisfaction of a number of conditions, including, among others,

     *    all  required  approvals,  consents,  or  waivers,  including  without
          limitation,  approval by the Federal  Reserve Board and the Department
          of Banking,  and all applicable  statutory  waiting periods shall have
          expired except those  approvals for which failure to obtain would not,
          individually or in the aggregate, have a Materially Adverse Effect (as
          defined in the Agreement) on ACNB, ACNB North, Farmers or FNB;

     *    all other  requirements  prescribed  by law which are necessary to the
          consummation of the  transactions  contemplated by the Agreement shall
          have been satisfied;

     *    the absence of any order, decree or injunction of a court or agency of
          competent jurisdiction which would enjoin or prohibit the consummation
          of the Merger, or any litigation or proceeding pending against ACNB or
          Farmers or their  subsidiaries by any  governmental  agency seeking to
          prevent consummation of the transactions described in the Agreement;

     *    the absence of any statute,  rule,  regulation,  order,  injunction or
          decree enacted,  entered,  promulgated or enforced by any governmental
          authority which would prohibit,  restrict or make illegal consummation
          of the Merger;

     *    the  Merger  shall  meet  the  requirements  for  pooling-of-interests
          accounting  treatment under generally accepted  accounting  principles
          and under the  accounting  rules of the Commission and ACNB shall have
          received a letter from Stambaugh o Ness, P.C. to such effect;

     *    the  Registration  Statement  shall  have been  filed by ACNB with the
          Commission  under  the  Securities  Act and shall  have been  declared
          effective prior to the time this Proxy  Statement/Prospectus  is first
          mailed to the shareholders of Farmers,  and no stop order with respect
          to the  effectiveness  of the  Registration  Statement shall have been
          issued, and the ACNB Common Stock to be issued pursuant to

                                       36

<PAGE>


          the  Agreement  shall  have been  registered  or  qualified  under the
          securities  or "blue sky" laws in all  states in which such  action is
          required; and

     *    a ruling from the Internal Revenue Service,  or an opinion of counsel,
          regarding  the  tax  consequences  of  the  Merger,  shall  have  been
          delivered in accordance with the terms of the Agreement.

     Additionally,  the  obligations of ACNB and ACNB North to effect the Merger
are subject to satisfaction of the following  conditions  prior to the Effective
Time:

     *    each  of  the  representations  and  warranties  of  Farmers  and  FNB
          contained in the  Agreement  shall be true and correct in all material
          respects  as of the  Closing,  each  of  Farmers  and FNB  shall  have
          performed  each  of  the  covenants  and  agreements  material  to its
          operations and prospects contained in the Agreement,  and certificates
          to such effect shall have been delivered to ACNB and ACNB North;

     *    ACNB shall have been  furnished  an "agreed  upon  procedures"  letter
          dated the Effective  Date, in form and substance  satisfactory to ACNB
          to the effect that,  based upon  procedures  performed with respect to
          the financial condition of Farmers,  FNB and affiliates,  for a period
          from  December 31, 1997,  to a specified  date not more than five days
          prior to such letter,  nothing has come to their  attention that would
          indicate that there has been a change in the capitalization of Farmers
          or FNB on a consolidated  basis, or any material  adjustments would be
          required  to the audited  financial  statements  for the period  ended
          December  31,  1997,  in  order  for  them  to be in  conformity  with
          generally accepted accounting principles applied on a consistent basis
          with that of prior periods;

     *    there shall not have occurred any change in the  financial  condition,
          properties, assets, business or results of operation of Farmers or FNB
          which,  individually or in the aggregate,  has had or might reasonably
          be expected to result in a Material  Adverse  Effect on Farmers or FNB
          other  than  changes   resulting  from  changes  in  banking  laws  or
          regulations or changes in generally accepted accounting principles, or
          interpretations thereof, that affect the banking or thrift industries;

     *    ACNB shall have received from each person  identified by Farmers to be
          an  affiliate  of Farmers an  executed  counterpart  of an  affiliates
          agreement in the form contemplated by the Agreement; and

     *    except  as  otherwise  provided  in  the  Agreement,  all  issued  and
          outstanding  options,  warrants  or rights to acquire  Farmers  Common
          Stock or any capital stock of FNB shall have been canceled.


                                       37

<PAGE>

     *    holders  of no more than 7% of the issued  and  outstanding  shares of
          Farmers (17,360 shares) shall have exercised dissenters' rights;

     *    no  environmental  problem of the kind  contemplated in Article III of
          the Agreement and not previously  disclosed shall have been discovered
          that would, or that potentially could, materially and adversely affect
          the  conditions   (financial  or  otherwise),   assets,   liabilities,
          business, operations or future prospects of Farmers or FNB;

     *    litigation pending against Farmers or FNB that, individually or in the
          aggregate,   would  have  a  Material   Adverse   Effect  on  Farmers'
          consolidated  operations or future prospects,  shall have been settled
          or otherwise resolved on terms satisfactory to ACNB.

     The  obligations  of Farmers  and FNB to effect  the Merger are  subject to
satisfaction of the following conditions prior to the Effective Time:

     *    each of the  representations  and  warranties  of ACNB and ACNB  North
          contained in the  Agreement  shall be true and correct in all material
          respects  as of the  Closing,  each of ACNB and ACNB North  shall have
          performed  each  of  the  covenants  and  agreements  material  to its
          operations and prospects contained in the Agreement,  and certificates
          to such effect shall have been delivered to Farmers;

     *    there shall not have occurred any change in the  financial  condition,
          properties,  assets,  business or results of operation of ACNB or ACNB
          North, which individually or in the aggregate, had or might reasonably
          be  expected  to result in a  Material  Adverse  Effect on ACNB or the
          Subsidiaries (as defined in the Agreement) taken as a whole;

     *    Farmers shall have received an updated opinion from GM&A,  dated as of
          a date no later  than  the date  this  Proxy  Statement/Prospectus  is
          mailed to the Farmers  shareholders  in connection with the Merger and
          not   subsequently   withdrawn,   to  the   effect   that  the  Merger
          Consideration is fair to Farmers'  shareholders from a financial point
          of view;

     *    a  certificate  for the  required  number of whole  shares of the ACNB
          Common Stock,  as  determined  in  accordance  with Section 2.1 of the
          Agreement, and cash payable for the fractional shares interests, shall
          have  irrevocably  been  delivered to Registrar  and Transfer  Company
          (ACNB's transfer agent), as Exchange Agent; and

                                       38

<PAGE>

     *    the  status  of all  pending  litigations  that  might  reasonably  be
          expected  to  result  in a  Materially  Adverse  Effect to ACNB or its
          subsidiaries taken as a whole shall be satisfactory to Farmers.

     Waiver; Amendment

     Prior to the Effective Time, any provision of the Agreement may be:

     *    waived by the party benefitted by the provision; or

     *    amended  or  modified  at any time  (including  the  structure  of the
          transaction) by an agreement in writing  between the parties  approved
          by their respective  boards of directors,  except that no amendment or
          waiver  may be made that  would  change  the form or the amount of the
          Merger  Consideration  or otherwise have the effect of prejudicing the
          Farmers shareholders'  interest in the Merger Consideration  following
          the Meeting.

     Closing; Effective Date; Termination

     The  Agreement  provides that the Closing will occur at such time and place
as shall be agreed upon by the parties,  but no later than the 30th business day
after:

     *    the last approval of required governmental  authorities is granted and
          any related waiting periods expire;

     *    the  lifting,   discharge  or  dismissal  of  any  stay  of  any  such
          governmental approval or of any injunction against the Merger; and

     *    all  shareholder  approvals  required by the  parties  pursuant to the
          Agreement are received.

The  Merger,  and the  transactions  described  by the  Agreement,  will  become
effective  at 11:59 p.m.  on the day the  articles  of merger are filed with the
Pennsylvania Department of State. The presentation of the articles of merger for
acceptance  and filing is subject  to the rights of the boards of  directors  of
ACNB and Farmers to terminate the Agreement  under certain  circumstances.  ACNB
and Farmers propose to effect the Merger in the first quarter of 1999.

     The Agreement  provides  that,  whether before or after its approval by the
shareholders of Farmers, it may be terminated and the transactions  contemplated
in the Agreement abandoned at any time prior to the Effective Date:

     *    by the mutual,  written  consent of ACNB and Farmers,  if the board of
          directors of each so determines by majority vote of the members of the
          entire board;

                                       39

<PAGE>

     *    by  Farmers  if (a)  there has been a  material  breach by ACNB of any
          representation,  warranty,  covenant  or  agreement  contained  in the
          Agreement  which is not cured within 30 days after  written  notice of
          such  breach  is  given  to ACNB  by  Farmers,  or (b)  any  condition
          precedent  to Farmers'  obligations  as set forth in Article VI of the
          Agreement  has not been met or waived by  Farmers at such time as such
          condition can no longer be satisfied;

     *    by ACNB in the event (a) of a material breach by Farmers or FNB of any
          representation,  warranty,  covenant  or  agreement  contained  in the
          Agreement  which is not cured within 30 days after  written  notice of
          such breach is given to Farmers by ACNB or (b) any condition precedent
          to ACNB's  obligations as set forth in Article VI of the Agreement has
          not been met or waived by ACNB at such time as such  condition  can no
          longer be satisfied; or

     *    by ACNB or Farmers if the Merger and the transactions described in the
          Agreement  are not  consummated  by June 30, 1999,  unless the parties
          agree to extend the time by which such closing must occur.

     Expenses

     If the  Agreement  is  terminated,  in  accordance  with  the  terms of the
Agreement:  (i) by the mutual,  written  consent of Farmers and ACNB; or (ii) by
Farmers or ACNB in the event the  Merger is not  consummated  by June 30,  1999,
then termination shall be without cost,  expense or liability on the part of any
party to the other party. In all other  instances,  termination of the Agreement
shall be  without  cost,  liability  or  expense on the part of any party to the
other parties,  unless the breach of a  representation,  warranty or covenant is
caused by the willful  conduct or gross  negligence of the party, in which event
such party will be liable to the other parties for all  out-of-pocket  costs and
expenses.

     Exchange of Stock Certificates

     At  the  Effective  Date,  without  any  further  action  on  the  part  of
shareholders,  each share of Farmers Common Stock that is issued and outstanding
as of the  Effective  Date  (other  than (i) shares the holders of which (each a
"Dissenting  Shareholder")  are exercising  appraisal rights pursuant to the BCL
(the "Dissenters'  Shares"), if any, and (ii) shares held directly or indirectly
by ACNB, except for shares held in a fiduciary  capacity or in satisfaction of a
debt previously contracted) shall automatically become and be converted into the
right to receive  2.266 shares of ACNB Common Stock.  As of the Effective  Date,
any shares held directly or indirectly by ACNB,  except in a fiduciary  capacity
or in  satisfaction  of a debt  previously  contracted,  shall be  canceled  and
retired and cease to exist and no exchange or payment shall be made with respect
thereto.


                                       40

<PAGE>

     After the  Effective  Date,  ACNB  shall  send  transmittal  materials  and
instructions for surrendering of Farmers certificates.

     To the  extent  permitted  by  law,  in the  event  that  any  certificates
representing  shares of  Farmers  Common  Stock  have not been  surrendered  for
exchange in accordance with the Agreement on or before the second anniversary of
the Effective Time, ACNB may at any time  thereafter,  with or without notice to
the  holders of record of such  shares,  sell for the  accounts of any or all of
such  holders  any or all of the shares of ACNB  Common  Stock the  holders  are
entitled to receive.  Any sale may be made by public or private  sale or sale at
any  broker's  board or on any  securities  exchange  in such manner and at such
times as ACNB shall  determine.  The net proceeds of any such sale shall be held
for  holders  of the  certificates,  to be paid to them  upon  surrender  of the
certificates for exchange.

     In the event any  outstanding  certificates  for shares of  Farmers  Common
Stock shall have been lost, stolen or destroyed, upon the making of an affidavit
of that fact by the person  claiming  such  certificates  to be lost,  stolen or
destroyed  and the  posting by such  person of a bond in such amount as ACNB may
direct as  indemnity  against any claim that may be made against it with respect
to such  certificates,  ACNB will issue in  exchange  for such  lost,  stolen or
destroyed  certificates,  the  shares  of ACNB  Common  Stock  into  which  such
certificates have been converted pursuant to the Exchange Ratio.

     Application for Listing

     Pursuant  to the  Agreement,  ACNB has  agreed to use its best  efforts  to
apply, within 180 days of consummation of the Merger, to the NASD to qualify for
quotation  of the ACNB  Common  Stock on the NASDAQ  National  Market  System or
NASDAQ Small Cap Stocks,  as  applicable.  We cannot assure that the ACNB Common
Stock will be accepted for such listing.

Regulatory Approvals of Farmers

     The Merger involves the  acquisition of a bank holding  company  registered
under the Bank Holding Company Act of 1956, as amended  ("Holding Company Act"),
therefore,  it is subject to notice to or approval of the Federal  Reserve Board
under the Holding  Company Act.  ACNB  submitted  the FRB Notice  regarding  the
acquisition of Farmers to the Federal  Reserve Bank of  Philadelphia  on October
__, 1998. In reviewing the FRB Notice, the Federal Reserve Board considers:

     *    the financial and managerial resources of ACNB and Farmers;

     *    the effect of the  transaction on competition in the markets served by
          ACNB and Farmers;

     *    the convenience and needs of the public; and

                                       41

<PAGE>

     *    among other  things,  ACNB's and  Farmers'  record of  performance  in
          helping to meet local credit needs.

     In  addition  to the  foregoing,  Federal  Reserve  Board may object to the
transaction  based upon its  assessment  of the impact of the Year 2000 Issue on
the parties to the Merger.  See,  BUSINESS OF  FARMERS--Impact  of the Year 2000
Issue;  IMPACT OF THE YEAR 2000 ISSUE ON ACNB; and  MANAGEMENT'S  DISCUSSION AND
ANALYSIS OF FINANCIAL  CONDITION AND RESULTS OF OPERATIONS OF FARMERS--Impact of
the Year 2000 Issue.

     The approval of the Department of Banking under Section 112 and Section 115
of the Banking Code must also be obtained  before the Merger may be consummated.
The Department of Banking will consider factors similar to those examined by the
Federal  Reserve  Board.  ACNB submitted the PA Application to the Department of
Banking on October __, 1998.

     The Merger  cannot  proceed  in the  absence  of the  requisite  regulatory
approvals.  To date, however,  none of the required approvals have been obtained
in  respect  of the  Merger,  and we  cannot  assure  that all  such  regulatory
approvals will be obtained, and, if the Merger is approved, we cannot assure the
date of any such approval. In addition, we cannot assure that any such approvals
will not contain a condition or requirement that causes the approvals to fail to
satisfy the conditions set forth in the  Agreement.  Likewise,  we cannot assure
that the U.S.  Department  of Justice will not  challenge the Merger or, if such
challenge is made, the result thereof.


Interests of Certain Persons in the Merger

     Certain members of Farmers'  management and the Farmers Board may be deemed
to have interests in the Merger in addition to their  interests as  shareholders
of Farmers  generally.  These  include,  among other  things,  provisions in the
Agreement relating to indemnification  and employment.  You will find additional
information  about certain persons who may have an interest in the Merger in the
following section entitled "Management and Operations Following the Merger."

     As of the Record Date,  the  directors  and  executive  officers of Farmers
beneficially own approximately __________ shares of Farmers Common Stock.

     Pursuant to the  Agreement,  ACNB has agreed to  indemnify  the present and
former  officers,  directors,  employees  and agents of Farmers  and FNB against
certain  liabilities  arising prior to the  effective  time of the Merger to the
full extent then  permitted  by the Farmers  Articles  and Farmers  Bylaws,  the
charter and bylaws of FNB, each as in effect on the date of the Agreement.


                                       42

<PAGE>


     Under the terms of the Agreement,  ACNB and its  affiliates  have agreed to
employ the  employees,  in good  standing and actively at work on the  Effective
Date, of Farmers and FNB, who in their current  positions with  compensation  no
less than their current levels of compensation,  with such changes in the future
as  may  be   appropriate,   as   determined   by  FNB's  Board  of   Directors.
Notwithstanding  the  foregoing,  ACNB retains the right to terminate any of the
continuing employees at any time following the Effective Date for "Good Reason",
as that term is defined by ACNB. All benefits of the  continuing  employees will
be  maintained  at a level not less than  equal to the  benefits  enjoyed by the
employees  of Farmers  prior to the  Effective  Date,  with such  changes in the
future as may be  appropriate,  as determined  by FNB's Board of Directors.  The
continuing  employees are also eligible to apply for any positions  available at
ACNB, or any of its subsidiaries. Farmers and FNB employees who remain employees
of the surviving  corporation or FNB after the Effective  Date, will be entitled
to credit for past  service  with  Farmers or FNB for  purposes of  eligibility,
vesting and accrual and to participate in employee health, welfare,  pension and
fringe benefit  plans,  or whatever  stock option,  bonus or incentive  plans or
other fringe  benefit  programs  may be in effect for  employees of ACNB and its
subsidiaries.

Management and Operations Following the Merger

     The Agreement provides that two (2) persons who are mutually agreed upon by
ACNB and Farmers and who  previously  served as  directors  of Farmers  shall be
appointed to the Board of  Directors  of ACNB,  one person to serve as a Class 1
Director,  one person to serve as a Class 2 Director, and each shall serve until
such time as his successor has been duly elected,  qualified, or appointed. ACNB
agreed to waive any mandatory retirement  requirements  contained in its by-laws
so far as such requirement pertains to such two persons.

     The Agreement also provides that the directors of FNB immediately  prior to
the Effective Date will  constitute the directors of FNB  immediately  following
the Merger,  with the  addition of Carolyn H. Kough and Ronald L.  Hankey.  Each
non-employee  director  will  receive  compensation  of $2,850  per  year.  Each
non-employee  director  will  receive  $265.00  per meeting  actually  attended,
committee  fees of $80.00 per hours,  a seminar  fee of $250.00 per half day and
$400.00 per full day seminar,  plus applicable  expenses,  as  compensation  for
services rendered in their capacity as a Director.

     At the Effective Time, (i) the articles of incorporation and bylaws of ACNB
North in effect  immediately prior to the Effective Time will be the articles of
incorporation  and bylaws of the Surviving  Corporation,  and (ii) the directors
and officers of ACNB North  immediately  prior to the Effective Time will be the
directors  and  officers  of  the  Surviving  Corporation.  At  and  immediately
following the Effective  Time, the directors of FNB shall consist of the persons
who  were  members  of the FNB  Board  of  Directors  immediately  prior  to the
Effective  Time,  and Ronald L. Hankey and Carolyn H. Kough.  Additionally,  the
ACNB Board of Directors, shall elect two persons, nominated by the Farmers Board
of Directors and acceptable to the ACNB

                                       43

<PAGE>

Board of Directors, in its reasonable discretion,  to become members of the ACNB
Board of Directors on the Effective Date.

Accounting Treatment of the Merger

     The  Merger is  intended  to be  treated  as a  pooling  of  interests  for
accounting purposes in accordance with generally accepted accounting  principles
and  under  the  accounting  rules  of the  Commission.  As a  condition  to the
consummation  of the Merger,  ACNB is to receive a letter  from its  independent
accountants,  Stambaugh  o Ness,  P.C.,  that the  Merger  will be  treated as a
pooling of interests.  In order to preserve the intended accounting treatment of
the Merger as a pooling of interests, the Agreement also requires as a condition
to the  obligations  of ACNB and ACNB North under the Agreement that each person
deemed to be an  "affiliate"  of  Farmers  enter into an  agreement  not to sell
shares of ACNB Common  Stock  acquired  in the Merger  until  financial  results
covering  at  least  30  days  of  post-Merger  combined  operations  have  been
published.

Income Tax Consequences of the Merger

     The following  discussion  summarizes  the  anticipated  federal income tax
consequences of the Merger. ACNB and Farmers believe that for federal income tax
purposes:

     *    the Merger  will  constitute  a  reorganization  within the meaning of
          Section  368(a) of the Internal  Revenue Code of 1986, as amended (the
          "Code"),   and   Farmers   and  ACNB  will  each  be  a  "party  to  a
          reorganization" within the meaning of Section 368(b) of the Code;

     *    no gain or loss will be recognized by Farmers or ACNB by reason of the
          Merger;

     *    except for cash received in lieu of fractional shares, no income, gain
          or loss  generally will be recognized by Farmers  shareholders  on the
          exchange of their  shares of Farmers  Common  Stock for shares of ACNB
          Common Stock;

     *    the  basis of the ACNB  Common  Stock to be  received  by the  Farmers
          shareholders  generally  will be,  in each  instance,  the same as the
          basis of the Farmers Common Stock surrendered in exchange therefor;

     *    the  holding  period of the ACNB  Common  Stock to be  received by the
          shareholders of Farmers generally will include the period during which
          the Farmers  Common Stock  surrendered  in exchange  therefor has been
          held,  provided that the Farmers Common Stock surrendered is held as a
          capital asset on the date of the exchange pursuant to the Merger; and

                                       44

<PAGE>


     *    the  payment  of cash to the  Farmers  shareholders  in lieu of  their
          fractional  share  interests  of ACNB Common Stock  generally  will be
          treated as having been received as a  distribution  in full payment in
          exchange for the fractional  share interest of ACNB Common Stock which
          such  shareholders  would  otherwise  be  entitled to receive and will
          qualify as capital gain or loss.

     The  obligations  of the parties to consummate  the Merger are  conditioned
upon  receipt of a ruling from the  Internal  Revenue  Service (the "IRS") or an
opinion  of counsel  substantially  to the effect  that the  federal  income tax
consequences  of the Merger are as  summarized  above.  Unlike a ruling from the
IRS, an opinion of counsel would have no binding  effect on the IRS. Such ruling
or  opinion  would  not  deal  with  all of the tax  considerations  that may be
relevant  to  particular  Farmers  shareholders,  such as  shareholders  who are
dealers in securities, foreign persons, tax-exempt entities or the impact of the
alternative  minimum  tax.  Such ruling or opinion  would not address any state,
local or foreign tax  considerations,  any  federal  estate,  gift,  employment,
excise or other non-income tax considerations.

     The foregoing  constitutes only a general description of the federal income
tax  consequences of the Merger,  without  consideration of the particular facts
and circumstances of your situation.  We recommend that you consult your own tax
advisors as to particular facts and circumstances which may be unique to you and
not common to  shareholders as a whole and also as to any estate,  gift,  state,
local or foreign tax  consequences  arising out of the Merger and/or any sale of
ACNB common stock received in the Merger.


                                       45

<PAGE>



                    DESCRIPTION OF ACNB AND ITS COMMON STOCK

Information Concerning ACNB

     ACNB is a Pennsylvania  business  corporation  registered as a bank holding
company with its headquarters in Adams County,  Pennsylvania.  As a bank holding
company,  ACNB engages in general commercial and retail banking and bank-related
business  through  its  commercial  bank  subsidiary.   ACNB  owns  all  of  the
outstanding  shares of Adams County National Bank and ACNB North.  ACNB owns all
the outstanding  shares of Adams County National Bank  (hereinafter the "Bank").
ACNB and the Bank have the same Board of  Directors.  ACNB,  organized  in 1983,
presently has no significant operations other than serving as a holding company.
The Bank engages in a  full-service  commercial  and consumer  banking and trust
business.  With  its  main  office  at  675  Old  Harrisburg  Road,  Gettysburg,
Pennsylvania,  the Bank provides financial services to its customers through its
community banking network of fourteen full-service offices located through Adams
County, Pennsylvania,  and in Hanover, York County, Pennsylvania. As of December
31, 1997, ACNB had a total of 157 full-time and 60 part-time employees.

Incorporation by Reference

     Certain documents  previously filed by ACNB with the Commission pursuant to
the  Exchange  Act or the  Securities  Act,  as the  case  may  be,  are  hereby
incorporated by reference in this Proxy Statement/Prospectus as follows:

     *    the Definitive  Proxy Statement on Schedule 14A for the Annual Meeting
          of Shareholders on May 5, 1998;
 
     *    the Annual Report on Form 10-K for the year ended December 31, 1997;

     *    the  Quarterly  Report on Form 10-Q for the  quarter  ended  March 31,
          1998;

     *    the Quarterly Report on Form 10-Q for the quarter ended June 30, 1998;
          and

     *    the Current Report on Form 8-K filed July 30, 1998.

     All documents filed by ACNB pursuant to Sections 13(a),  13(c), 14 or 15(d)
of the Exchange Act after the date hereof and prior to the  consummation  of the
Merger shall be deemed to be incorporated  by reference  herein and to be a part
hereof from the date of filing  thereof.  Any statement  contained in a document
incorporated or deemed to be incorporated by reference herein shall be deemed to
be modified or superseded for purposes of this Proxy Statement/Prospectus to the
extent that a statement  contained  herein, or in any other  subsequently  filed
document  that also is or is  deemed to be  incorporated  by  reference  herein,
modifies  or  supersedes  such  statement.  Any such  statement  so  modified or
superseded  shall  not be  deemed,  except  as so  modified  or  superseded,  to
constitute a part of this Proxy Statement/Prospectus.  All information appearing
in this Proxy  Statement/Prospectus  should be read in conjunction  with, and is
qualified in its entirety by, the information and financial

                                       46

<PAGE>

statements  (including  notes thereto)  appearing in the documents  incorporated
herein by reference, except to the extent set forth in the immediately preceding
statement.

General

     ACNB is authorized to issue  20,000,000  shares of ACNB Common Stock. As of
September 30, 1998, ACNB had approximately 5,253,278 shares of ACNB Common Stock
issued  and  outstanding.   At  September  30,  ACNB  had  approximately   3,001
shareholders of record.  This does not reflect the number of persons or entities
who hold their stock in nominee or street name through various  brokerage firms.
Registrar  and Transfer  Company is the transfer  agent and  registrar  for ACNB
Common Stock.

Common Stock

     Dividends

     Holders of ACNB Common  Stock are  entitled to receive  dividends as may be
declared by the ACNB Board of Directors out of funds legally available therefor.
ACNB is a holding company, therefore, the funds required by ACNB to enable it to
pay dividends are derived  predominantly  from the dividends paid to ACNB by its
subsidiary.  ACNB's  ability to pay  dividends is dependent  upon the  earnings,
financial  condition  and  ability  to pay  dividends  of  ACNB's  subsidiaries,
principally the Bank. Payment of dividends by the Bank is subject to a number of
regulatory  restrictions.  See  "REGULATIONS  AFFECTING  DIVIDENDS." The Bank is
presently   permitted  to  pay  dividends  without  prior  approval  under  such
regulatory  requirements.  At December 31, 1997, an aggregate of $3,199,000  was
available  for the payment of  dividends  to ACNB.  ACNB has  historically  paid
dividends on or about March 15, June 15,  September  15, and December 15 of each
year.

     Liquidation

     In the  event of  liquidation,  dissolution  or  winding  up of ACNB,  ACNB
shareholders are entitled to share ratably in all assets remaining after payment
of liabilities, subject to prior distribution rights of ACNB Preferred Stock, if
any, then outstanding.  On September 30, 1998, no shares of ACNB Preferred Stock
were issued or outstanding, or authorized for issuance under the ACNB Articles.

     Voting

     Holders of ACNB Common  Stock are  entitled to one vote for each share held
by them at all  meetings of the  shareholders  and are not  entitled to cumulate
their votes for the election of directors.

                                       47

<PAGE>

     No Preemptive Rights

     Holders of ACNB Common Stock do not have preemptive rights.

Pennsylvania Anti-Takeover Law Provisions

     The BCL and the ACNB Articles and ACNB Bylaws provide  numerous  provisions
that may be deemed to be anti-takeover  in nature,  both as to purpose and as to
effect. There are four major anti-takeover  provisions under the BCL relating to
corporations  that have their  securities  registered with the Commission  under
Section  12  of  the   Securities   Act.   ACNB  is  subject  to  the  statutory
"anti-takeover  provisions" of the BCL, including Subchapters 25E, F, G and H of
the BCL.

     Subchapter  25E  (relating to control  transactions)  provides  that if any
person  or  group  acquires  20%  or  more  of the  voting  power  of a  covered
corporation, the remaining shareholders may demand from such person or group the
fair value of their  shares,  including  a  proportionate  amount of any control
premium.

     Subchapter  25F (relating to business  combinations)  delays for five years
and imposes  conditions  upon  "business  combinations"  between an  "interested
shareholder"  and the  corporation.  The term "business  combination" is defined
broadly to include various  transactions  utilizing a  corporation's  assets for
purchase price amortization or refinancing purposes. An "interested shareholder"
is defined  generally as the beneficial owner of at least 20% of a corporation's
voting shares.

     Subchapter 25G (relating to control-share  acquisitions)  prevents a person
who has acquired 20% or more of the voting power of a covered  corporation  from
voting such shares unless the "disinterested"  shareholders  approve such voting
rights.  Failure  to obtain  such  approval  exposes  the owner to the risk of a
forced sale of the shares to the issuer.  If  shareholder  approval is obtained,
the corporation is also subject to Subchapters 25I and J of the BCL.  Subchapter
25I provides for a minimum  severance  payment to certain  employees  terminated
within two years of the approval.  Subchapter  25J  prohibits the  abrogation of
certain labor contracts prior to their stated date of expiration.

     Subchapter  25H (relating to  disgorgement)  applies in the event that: (i)
any person or group  publicly  discloses  that the  person or group may  acquire
control of the  corporation;  or (ii) a person or group  acquires  (or  publicly
discloses  an offer or intent to acquire) 20% or more of the voting power of the
corporation and, in either case, sells shares within 18 months  thereafter.  Any
profits  from sales of equity  securities  of the  corporation  by the person or
group during the 18-month  period belong to the  corporation  if the  securities
that were sold were  acquired  during  the  18-month  period or within 24 months
prior thereto.


                                       48

<PAGE>


     Subchapters  25E, F, G and H contain a wide  variety of  transactional  and
status exemptions, exclusions and safe harbors.

     In addition,  the BCL permits an amendment of the corporation's articles or
other  corporate  action,  if approved  by  shareholders  generally,  to provide
mandatory special  treatment for specified groups of nonconsenting  shareholders
of the same class by  providing,  for example,  that shares of common stock held
only by designated  shareholders of record, and no other shares of common stock,
shall  be  cashed  out at a price  determined  by the  corporation,  subject  to
applicable dissenters' rights.

     The BCL also  provides that  directors  may, in  discharging  their duties,
consider  the  interests  of a number  of  different  constituencies,  including
shareholders,  employees, suppliers, customers, creditors and the communities in
which the  corporation  is located.  Directors  are not required to consider the
interests  of  shareholders  to a  greater  degree  than  other  constituencies'
interests.  The BCL  expressly  provides  that  directors  do not violate  their
fiduciary  duties  solely  by  relying  on  poison  pills  or the  anti-takeover
provisions of the BCL.

Provisions in ACNB's Articles of Incorporation and Bylaws

     Certain provisions of the ACNB Articles and ACNB Bylaws may have the effect
of making  more  difficult  non-negotiated  tender or  exchange  offers or other
attempts  to  take  over  or  acquire  ACNB's  business.  These  provisions  may
discourage some potential  acquirors from attempting such a transaction on terms
that some shareholders might favor.

     The ACNB  Articles  authorize  ACNB to issue  20,000,000  shares  of Common
Stock. As of September 30, 1998,  ACNB has  approximately  14,746,722  shares of
authorized but unissued shares of ACNB Common Stock.  Following the Merger, ACNB
would have  approximately  14,184,754  shares of  authorized  but unissued  ACNB
Common Stock.  As a general  matter,  the  existence of unissued and  unreserved
shares of stock  provides  a board of  directors  with the  ability to cause the
issuance of shares of stock  under  circumstances  that might  prevent or render
more difficult or costly the completion of a takeover.

     The ACNB Articles and the ACNB Bylaws  provide that the directors  shall be
divided  into three  classes  with not more than 8  directors  in Class 1 and in
Class 2 and not more than 9 directors  in Class 3. The entire Board of Directors
is to consist of not less than 5 or more than 25  shareholders,  with each class
serving for staggered three year terms. The number of directors in each class is
determined by resolution of a majority of ACNB's shareholders.

     The ACNB Bylaws  establish  advance  notice  procedures  with regard to the
nomination, other than by management, of candidates for election as directors.

     The ACNB Board of Directors is authorized to amend the ACNB Bylaws, subject
to the right of the shareholders to change such action by a majority vote.

                                       49

<PAGE>

                        COMPARISON OF SHAREHOLDER RIGHTS

Introduction

     Upon the consummation of the Merger, you will become a shareholder of ACNB.
Your rights are  presently  governed  by Farmers  Articles  and Farmers  Bylaws.
Certain of your  rights will  continue  to be  governed by the BCL,  while other
rights will be  governed by the ACNB  Articles  and the ACNB  Bylaws.  There are
certain  differences  between  ACNB's and  Farmers'  articles  and  bylaws.  The
following  discussion  is  not  intended  to  be a  complete  statement  of  all
differences  affecting your rights, but summarizes  material  differences and is
qualified in its entirety by reference to applicable Pennsylvania corporate laws
and  the  articles  of  incorporation  and  bylaws  of  ACNB  and  Farmers.  See
"DESCRIPTION  OF ACNB AND ITS COMMON STOCK -  Incorporation  by  Reference"  and
"ADDITIONAL INFORMATION."

     ACNB Common Stock,  unlike  Farmers  Common Stock,  is registered  with the
Commission  under  Section  12(g) of the  Securities  Act. As a result,  ACNB is
subject to the  periodic  reporting,  proxy  solicitation  and  insider  trading
requirements of the Securities  Act, which do not apply to Farmers.  Pursuant to
these requirements, ACNB makes available to shareholders, potential investors in
the general  public a significant  amount of  information  regarding ACNB in the
form of proxy  statements,  periodic  reports and other Commission  filings.  In
addition, directors,  executive officers and 10% beneficial shareholders of ACNB
are  subject  to the  insider  reporting  requirements  and  short-swing  profit
recapture provisions of Section 16 of the Exchange Act.


                                       50

<PAGE>
<TABLE>
<CAPTION>

                                                       FARMERS
                                                       -------                                    
<S>                                    <C> 
Title                                  Common Stock, $0.50 par value per share     

Shares Authorized                      1,000,000                                  

Shares Issued and Outstanding                          --                           

Preemptive Rights                      None                                        

Voting:  Election of Directors         Non-cumulative                              

Classification of Board of Directors   Board of Directors divided into 3 classes   
                                       with 3 year terms; 1/3 of directors
                                       elected each year

Voting:  Other Matters                                                              

Mergers, Consolidations, Liquidations  Approval by vote of 80% of outstanding    
Sales of Substantially All Assets      shares of Common Stock or 66 2/3% of        
                                       outstanding shares of Common Stock if
                                       received approved of 80% of the Board of
                                       Directors

Special Shareholder Meetings           Upon request of Chairman, President, a       
                                       majority of the Board or Executive        
                                       Committee or any shareholders entitled to   
                                       cast at least 40% of the votes that all    
                                       shareholders area entitled to cast

Authorization to Issue
 Additional Shares                     Approval by a majority of the Board          
                                                                                  
Repurchase of Additional Shares                                                    
                                                                                   
                                                                                        
                                                                                         
                                                                                          
                                                                                          
                                                                                          
Stock Incentive Plan                  No                                         

Dissenters' Rights                    Yes                                         

Dividend Reinvestment Plan            No                                          

Market                                No established market                      

Registered Under Exchange Act         No                                           


<CAPTION>
                                                      ACNB
                                                      ----

<S>                                    <C>  
Title                                  Common Stock, $2.50 par value per share

Shares Authorized                      20,000,000

Shares Issued and Outstanding                          --                       

Preemptive Rights                      None

Voting:  Election of Directors         Non-cumulative

Classification of Board of Directors   Board of Directors divided into 3 classes
                                       with 3 year terms; 1/3 of directors 
                                       elected each year  
                                       
Voting:  Other Matters                 One vote for each share owned of record

Mergers, Consolidations, Liquidations  Approval by vote of 75% of outstanding
Sales of Substantially All Assets      shares of Common Stock.
                                       
Special Shareholder Meetings           Upon request by a majority of the Board
                                       of Directors, or shareholders entitled to
                                       cast 1/3 of the votes that all
                                       shareholders are entitled to cast at the
                                       meeting.
                                       
Authorization to Issue                 Approval by a majority vote of the Board
 Additional Shares                     of Directors
                                       
Repurchase of Additional Shares        Stock can be repurchased up to the extent
                                       of unrestricted or unreserved undivided
                                       profits and as much of its unrestricted
                                       surplus as has been made available for
                                       such purpose by the prior affirmative
                                       vote of shareholders; stock cannot be
                                       repurchased when the Holding Company
                                       is insolvent or would be made insolvent
                                       by the purchase; and no more than 10
                                       percent of the outstanding shares can be
                                       repurchased in any twelve (12) month
                                       period without prior regulatory approval

Stock Incentive Plan                   No

Dissenters' Rights                     Yes

Dividend Reinvestment Plan             No

Market                                 No established market

Registered Under Exchange Act          Yes


                                       51
</TABLE>

<PAGE>

Dividends

     Pennsylvania law generally  permits a corporation to pay dividends  unless,
after giving effect thereto, the corporation would be unable to pay its debts as
they  become  due in the usual  course of  business  or the total  assets of the
corporation  would be less than the sum of its  total  liabilities.  As  holding
companies, the ability of Farmers and ACNB to pay dividends is largely dependent
upon  receipt  of  dividends  from  their   respective   subsidiary   depository
institutions.  Payment of dividends by these subsidiaries is subject to a number
of regulatory  restrictions.  For a summary of these regulatory  considerations,
see "REGULATIONS AFFECTING DIVIDENDS."

Limitations on Directors' Liability

     The BCL permits the  shareholders of a Pennsylvania  corporation to adopt a
bylaw provision  relieving a director (but not an officer) of personal liability
for monetary  damages in certain  circumstances.  The ACNB Bylaws contain such a
provision but Farmers Bylaws do not contain such a provision.

Indemnification

     The BCL  provides  that a business  corporation  may  indemnify  directors,
officers and other agents  against  liabilities  they may incur as such provided
that the  particular  person  acted  in good  faith  and in a  manner  he or she
reasonably  believed  to be in, or not  opposed  to, the best  interests  of the
corporation,  and,  with respect to any criminal  proceeding,  had no reasonable
cause to believe his or her conduct was unlawful. In the case of actions against
a director,  officer or other agent by or in the right of the  corporation,  the
power to indemnify  extends only to expenses (not  judgments and amounts paid in
settlement)  and such power  generally  does not exist if the  person  otherwise
entitled  to  indemnification  shall  have  been  adjudged  to be  liable to the
corporation unless it is judicially determined that, despite the adjudication of
liability but in view of all the circumstances of the case, the person is fairly
and reasonably  entitled to indemnification  for specified  expenses.  Under the
BCL,  the  corporation  is required to  indemnify  directors,  officers or other
agents against expenses they may incur in defending actions against them in such
capacities  if they are  successful on the merits or otherwise in the defense of
such actions.  Under the BCL, a corporation  may pay the expenses of a director,
officer or other agent  incurred in defending an action or proceeding in advance
of the final disposition thereof upon receipt of an undertaking from such person
to repay the  amounts  advanced  unless it is  ultimately  determined  that such
person is entitled to indemnification from the corporation.  The ACNB Bylaws and
the Farmers  Bylaws  provide  indemnification  of directors,  officers and other
agents and advancement of expenses as generally permitted by law.

     The BCL grants a corporation  broad  authority to indemnify its  directors,
officers  and  other  agents  for  liabilities  and  expenses  incurred  in such
capacity, except in circumstances where

                                       52

<PAGE>

the act or  failure  to act  giving  rise to the  claim for  indemnification  is
determined by a court to have constituted willful misconduct or recklessness.

                    DIVIDENDS AND MARKET PRICES OF SECURITIES

ACNB

     ACNB Common  Stock is traded in the  over-the-counter  Electronic  Bulletin
Board  Interdealer  System under the symbol  "ACNB." As of  September  30, 1998,
there were approximately  5,253,278 shares  outstanding and approximately  3,001
shareholders  of record.  In the table below,  we set forth the high and low bid
prices of ACNB  Common  Stock as  reported  on the  over-the-counter  Electronic
Bulletin Board  Interdealer  System for the first two quarters of calendar 1998,
and the four  quarters of calendar  1997 and  calendar  1996.  We also set forth
below the cash dividends  declared  during such periods.  The last sale price on
July 27, 1998, the last trading day before the  announcement of the Merger,  was
$29.25  per share.  Because of the  absence  of an  established  public  trading
market,  the reported sales are not necessarily  indicative of market value. The
most recent sale of which  management  is aware is a trade of _______  shares of
ACNB Common Stock that  occurred on November  ___,  1998 for $_______ per share.
The cash dividends declared during such periods are also set forth in the table.

                           1998                               1997             
                --------------------------        ----------------------------
                                    Cash                               Cash 
                  Bid Price       Dividend           Bid Price       Dividend 
                High    Low         Paid           High     Low        Paid 
                ----    ---         ----           ----     ---       ------

1st Quarter    $25.63   $23.38      $0.19         $17.50   $16.00      $0.18 
2nd Quarter    $27.50   $25.63      $0.19         $18.25   $16.63      $0.18 
3rd Quarter                                       $22.75   $18.25      $0.19
4th Quarter                                       $24.25   $22.75      $0.24 


                                          1996                      
                              ----------------------------                
                                                     Cash                  
                              Bid Price             Dividend          
                             High     Low            Paid           
                             ----     ---           ------

1st Quarter                 $18.25    $16.00         $1.17  
2nd Quarter                 $16.25    $16.00         $0.17
3rd Quarter                 $17.00    $16.25         $0.18
4th Quarter                 $16.25    $16.00         $0.18


Farmers

     There is no established public trading market for Farmers' Common Stock and
there has been only limited and sporadic  trading in Farmers  Common  Stock.  On
September 30, 1998, there were 248,000 shares  outstanding and approximately 248
shareholders of record.  Because of the absence of an established public trading
market,  the reported sales are not necessarily  indicative of market value. The
most  recent  sale of which  management  is aware  is a trade of 146  shares  of
Farmers  Common Stock that occurred in June,  1998 for $33.75 per share.  In the
table below, we set forth the cash dividends declared for the first two quarters
of 1998 and the four quarters of calendar 1997 and 1996.


                                       53

<PAGE>

                    1998                       1997                    1996
              -------------------       --------------------      ------------
                 Dividends                  Dividends               Dividends
                 Declared                   Declared                Declared
                ---------                   --------                -------- 

 1st Quarter       $0.14                     $0.10                    $
 2nd Quarter       $0.16                     $0.13                    $0.25
 3rd Quarter       $                         $0.13                    $
 4th Quarter       $                         $0.14                    $0.65


                         REGULATIONS AFFECTING DIVIDENDS

     The ability of ACNB and Farmers to pay dividends is largely  dependent upon
receipt of dividends from its commercial bank subsidiary,  Adams County National
Bank or FNB, as the case may be. Both federal and state laws impose restrictions
on the  ability of Adams  County  National  Bank and FNB to pay  dividends.  The
Federal  Reserve  Board,  the Office of the  Comptroller  of the  Currency  (the
"Comptroller")  and the Federal  Deposit  Insurance  Corporation  ("FDIC")  have
issued policy  statements that provide that, as a general matter,  insured banks
and holding companies may pay dividends only out of current operating earnings.

     Under  federal  law, the  approval of the  Comptroller  is required for the
payment of dividends in any calendar  year by a subsidiary  national bank if the
total of all  dividends  declared by such bank in a calendar  year  exceeds that
bank's net profits for that year  combined with its retained net profits for the
preceding two calendar years.  Moreover,  no dividends may be paid by a national
bank if its  "losses"  equal or exceed its  undivided  profits  account,  and no
dividend  may be paid in an amount in excess of its "net  profits then on hand."
In addition,  the Comptroller may find a dividend  payment which otherwise meets
the  criteria  specified  in the law,  nonetheless  to  constitute  an unsafe or
unsound practice.

                               BUSINESS OF FARMERS

General

     Farmers,  a Pennsylvania  business  corporation,  is a bank holding company
whose sole operating subsidiary is FNB, a national banking association.  Farmers
was organized at the direction of the FNB Board of Directors on August 14, 1991,
to acquire all of the capital stock of FNB pursuant to a Plan of  Reorganization
adopted  by  the  FNB  Board  of  Directors  and  subsequently  approved  by the
shareholders of FNB. Under the terms of the Plan of  Reorganization,  the common
stock of FNB was converted  into the right to receive  shares of Farmers  Common
Stock,   and  FNB  became  a  wholly-owned   subsidiary  of  Farmers.   Farmers'
headquarters is located at the main office of FNB.


                                       54

<PAGE>


     As of December 31, 1997, Farmers (on a consolidated basis) had total assets
of $41,220,594,  total deposits of $35,481,302 and total shareholders' equity of
$5,464,209. At September 30, 1998, Farmers had approximately 248 shareholders of
record.

     Farmers  acts as a  holding  company  and does not  directly  engage in any
substantial business activities.  Farmers functions primarily as a holder of all
of FNB's capital stock. As a bank holding company subject to the jurisdiction of
the Federal  Reserve  Board,  Farmers has the legal  capacity to acquire or form
additional  subsidiaries,   including  other  banks  and  companies  engaged  in
nonbanking activities which the Federal Reserve Board has found to be so closely
related to banking or managing or controlling  banks as to be a proper  incident
thereto.  Holding companies may also directly engage in such related  nonbanking
activities.  The types of nonbanking  activities which are currently permissible
are  subject to change by the Federal  Reserve  Board.  Although  Farmers has no
present  plans to  engage  in such  activities,  it may  choose  to do so in the
future.

Services

     FNB,  established  in 1909,  is a national  banking  association  under the
supervision  of the  Comptroller.  FNB's main  office is located at One West Big
Spring Avenue, Newville, Pennsylvania 17241.

     FNB conducts a general commercial banking business embracing  substantially
all of the traditional  lending and deposit functions of a local commercial bank
in  Pennsylvania.  FNB's services  include  accepting  time,  demand and savings
deposits,  including  interest-bearing accounts, regular savings accounts, money
market  accounts  and fixed and variable  rate  certificates  of deposit.  FNB's
services also include making secured and unsecured  commercial loans,  including
construction,  agricultural  and mortgage  loans.  Additional  services  include
providing  consumer  loans,  residential  mortgage  loans,  home equity lines of
credit,  revolving  credit  loans,  small  business  loans,  student  loans  and
financing on new car and truck loans.

     FNB also offers travelers checks and safe deposit  facilities.  In addition
to  regular  business  hours,  FNB offers 24 hour,  seven days a week  automated
banking services through its MAC system  membership.  FNB does not provide trust
or  agency  facilities,  as do some of its  competitors,  nor does it  currently
transact international business.

     In  addition to its main office and  administration  center,  FNB has three
full-service branch offices in Cumberland County, Pennsylvania,  one of which is
open two afternoons each week.

Regulation

     Farmers is registered as a bank holding  company under the Holding  Company
Act,  and is  therefore  subject to  regulation  by the Federal  Reserve  Board.
Farmers is required to file  periodic  reports of its  operations  with,  and is
subject to inspection by, the Federal Reserve Board.

                                       55

<PAGE>

     Under the policy of the Federal  Reserve Board with respect to bank holding
company  operations,  a bank  holding  company is deemed to serve as a source of
financial  strength  to its  subsidiary  depository  institutions  and to commit
resources to support such institutions in circumstances where it might not do so
absent such policy. The Federal Deposit Insurance Corporation Improvement Act of
1991  ("FDICIA")   requires  a  bank  holding  company  to  guarantee  that  any
"undercapitalized"  (as such term is defined in the statute) insured  depository
institution  subsidiary  will comply  with the terms of any capital  restoration
plan filed by such subsidiary with its appropriate federal banking agency.

     Farmers, as an "affiliate" of FNB within the meaning of the Federal Reserve
Act, is subject to certain  restrictions under the Holding Company Act regarding
extensions of credit to it by FNB,  investments in the stock or other securities
of  Farmers  by FNB and the use of stock  or  other  securities  of  Farmers  as
collateral for loans by FNB to any borrower.  Further, under the Holding Company
Act and  Federal  Reserve  Board  regulations,  a bank  holding  company and its
subsidiaries are prohibited from engaging in certain  arrangements in connection
with any extension of credit. These provisions generally provide that a bank may
not extend credit,  lease or sell property or furnish any service or fix or vary
the  consideration  for any of the  foregoing to a customer on the  condition or
requirement  that the  customer  provide  some  additional  credit,  property or
service to the bank, the bank's holding  company or any other  subsidiary of the
bank's holding company, or on the condition or requirement that the customer not
obtain other credit,  property or services  from a competitor  of the bank,  the
bank's holding company or any other subsidiary of the bank's holding company.

     FNB, as a nationally  chartered  bank, is subject to the National Bank Act,
as amended. It is subject to the supervision of, and to regular examinations by,
the Comptroller and is required to furnish  periodic reports to the Comptroller.
The  earnings of FNB are  affected by the  policies of  regulatory  authorities,
including the Comptroller,  the Federal Reserve Board and the FDIC. An important
function  of the Federal  Reserve  System is to  regulate  the money  supply and
interest  rates.  Among the instruments  used to implement those  objectives are
open  market  operations  in United  States  government  securities,  changes in
reserve requirements  against member bank deposits,  and limitations on interest
rates that member banks may pay on time and savings deposits.  These instruments
are used in varying combinations to influence overall growth and distribution of
bank loans,  investments,  and  deposits,  and their use may also  affect  rates
charged on loans or paid for deposits.

     FNB is a member of the Federal Reserve System and, therefore,  the policies
and  regulations of the Federal Reserve Board have had and will continue to have
a significant  effect on its deposits,  loans, and investment growth, as well as
the  rate of  interest  earned  and  paid,  and are  expected  to  affect  FNB's
operations in the future.  The effect of such policies and regulations  upon the
future  business and earnings of FNB cannot be  predicted.  The Federal  Reserve
System also regulates the activities of Farmers.


                                       56

<PAGE>

     FDICIA  requires   prompt   corrective   action  against   undercapitalized
institutions  and has  established  five  capital  categories.  These  are  well
capitalized,    adequately    capitalized,    undercapitalized,    significantly
undercapitalized and critically undercapitalized.  Well capitalized institutions
significantly  exceed  the  required  minimum  level  for each  capital  measure
(currently, risk-based and leverage). Adequately capitalized includes depository
institutions  that meet the required  minimum  level for each  capital  measure.
Undercapitalized  represents  depository  institutions  that  fail to  meet  the
required  minimum  level  for  any  relevant   capital  measure.   Significantly
undercapitalized  describes depository institutions that are significantly below
the minimum capital requirements.  Currently FNB and Farmers are considered well
capitalized.

     Under the Community Reinvestment Act, as amended ("CRA"), as implemented by
regulations  of  the  Comptroller,  a  bank  has a  continuing  and  affirmative
obligation,  consistent  with its safe and  sound  operation,  to help  meet the
credit  needs  of its  entire  community,  including  low  and  moderate  income
neighborhoods. The CRA does not establish requirements or programs for financial
institutions nor does it limit an institution's  discretion to develop the types
of products  and  services  that it believes  are best suited to its  particular
community,  consistent  with the CRA. The CRA requires the Comptroller to assess
an institution's record of meeting the credit needs of its community and to take
such record  into  account in its  evaluation  of certain  applications  by such
institution.  The CRA requires public  disclosure of an institution's CRA rating
and  requires  that  the  Comptroller   provide  a  written   evaluation  of  an
institution's CRA performance utilizing a four-tiered description rating system.
An  institution's  CRA  rating is  considered  in  determining  whether to grant
charters,   branches  and  other  deposit  facilities,   relocations,   mergers,
consolidations and acquisitions. A less than satisfactory performance may be the
basis for denying an application. In 1993, FNB received a satisfactory rating.

Competition

     FNB's  principal  market is in  Cumberland  County,  Pennsylvania  where it
competes for deposits and loans. In this area, FNB competes primarily with other
banks, savings and loan associations, mutual savings banks and credit unions, as
well as brokerage firms and insurance companies. FNB also competes with mortgage
bankers and finance  companies in certain aspects of its lending  business.  The
primary  factors in competing  for deposits are the ability to offer  attractive
rates and the  convenience  of office  locations.  The  primary  factors  in the
competition for loans are interest rates, loan origination fees and the range of
products and services offered.  Competition for origination of real estate loans
normally  comes from  other  commercial  banks,  thrift  institutions,  mortgage
bankers,  mortgage brokers and insurance companies. Many of its competitors have
significantly  greater financial  resources than FNB and larger branch networks.
Some of these  competitors  also have  advantages  as a result of the  different
regulations  under which they  operate  and other  factors,  including  size and
convenience of location.

     The business of FNB is not dependent upon any single  customer and the loss
of any single or any few customers would not have a material adverse impact upon
FNB.


                                       57

<PAGE>

Employees

     At December 31, 1997, FNB had 20 full-time and 1 part-time  employees.  FNB
is not subject to a collective  bargaining  agreement  and it believes  that its
relations with its employees are good. Farmers presently has no employees.

Certain Relationships and Related Party Transactions

     There have been no material  transactions  between  Farmers and FNB nor any
material transactions proposed with any director or executive officer of Farmers
and FNB or any associate of the foregoing persons. Farmers and FNB have had, and
intend to continue to have,  banking and financial  transactions in the ordinary
course of  business  with  directors  and  officers of Farmers and FNB and their
associates  on  comparable  terms  and  with  similar  interest  rates  as those
prevailing from time to time for other customers of Farmers and FNB.

     Total loans  outstanding  from  Farmers and FNB at December  31,  1997,  to
Farmers'  and FNB's  officers  and  directors  as a group and  members  of their
immediate  families and companies in which they had an ownership interest of 10%
or more was  $156,704.29 or  approximately  2.87% of the total equity capital of
Farmers.  Loans to such persons  were made in the  ordinary  course of business,
were  made on  substantially  the  same  terms,  including  interest  rates  and
collateral,  as those  prevailing at the time for comparable  transactions  with
other persons,  and did not involve more than the normal risk of  collectibility
or present other  unfavorable  features.  The aggregate  amount of  indebtedness
outstanding as of the latest practicable date,  September 30, 1998, to the above
described group was $38,540.19.

Litigation

     The  nature of FNB's  business  generates  a certain  amount of  litigation
involving  matters  arising in the ordinary  course of business.  At the present
time no  material  proceedings  are  pending  or are known to be  threatened  or
contemplated  against  FNB by  government  authorities  or any  other  person or
entity. There is no litigation or material proceedings by government authorities
or  any  other  person  or  entity  pending,   or  known  to  be  threatened  or
contemplated, against Farmers.

Properties

     FNB owns its main office, which houses the administration center of FNB and
Farmers, free and clear of any lien. FNB's main office is located in the central
business district of Newville, Pennsylvania at One West Big Spring Avenue.

                                       58

<PAGE>

Impact of the Year 2000 Issue

     The following  section  contains  forward-looking  statements which involve
risks and  uncertainties.  The  actual  impact on Farmers of the Year 2000 issue
could  materially  differ from that which is anticipated in the  forward-looking
statements as a result of certain factors identified below.

     The "Year 2000 Issue" is the result of some computer  programs  having been
written  using  two  digits  rather  than four to define  the  applicable  year.
Computer systems that have  date-sensitive  software or date-sensitive  hardware
may recognize a date using "00" as the Year 1900 rather than the Year 2000. This
could  result in a system  failure or  miscalculations  causing  disruptions  of
operations,  including,  among other  things,  a temporary  inability to process
transactions, send statements, or engage in similar normal business activities.

     Based on formalized assessment and testing, Farmers has determined that its
mission critical  computer systems should properly use dates beyond December 31,
1999.  Farmers'  existing core  processing  program files have been tested using
test data, with the results analyzed and verified for accuracy. Although testing
through  January  10,  2000,  has been  completed,  additional  testing  will be
conducted for dates extending beyond 2000.  Although test information  generated
by the system into the year 2000 indicates that Farmers' system is compliant, if
the system were not compliant, the Year 2000 issue could have a material adverse
impact on the operations of Farmers.

         Farmers has initiated formal communications with all of its vendors and
large  commercial  customers  to  determine  the  extent  to  which  Farmers  is
vulnerable as a result of the failure of those third parties to remediate  their
own Year 2000 Issue.  For significant  vendors,  Farmers will validate that they
are Year 2000  compliant by December 31, 1998,  or make plans to switch to a new
vendor or system that is compliant.  For insignificant vendors, Farmers will not
necessarily  validate  that  they  are Year  2000  compliant.  However,  for any
insignificant  vendor who  responds  that they will not be compliant by December
31, 1998, Farmers will seek a new vendor or system that is compliant.  For large
commercial loan customers,  Farmers will take appropriate action based upon each
customer's response.

         Farmers has used both  internal  and  external  resources  to identify,
reprogram and test its software and hardware for Year 2000  compliance.  Farmers
plans to complete the Year 2000 project no later than December 31, 1998, for all
critical  systems.  The total cost of the Year 2000 project was determined to be
immaterial  and is not  expected  to have a  material  effect on the  results of
operations of Farmers.

         As a bank holding  company,  Farmers and its  subsidiary are subject to
the  regulation and oversight of various  banking  regulators.  Their  oversight
includes the provision of specific  timetables,  programs and guidance regarding
Year 2000 issues. Regulatory examination of the

                                       59

<PAGE>


holding  company and its  subsidiary's  Year 2000  programs  are  conducted on a
quarterly  basis and reports are  submitted  by Farmers'  subsidiary  to banking
regulators on a periodic basis.

                      IMPACT OF THE YEAR 2000 ISSUE ON ACNB

     The following  section  contains  forward-looking  statements which involve
risks and uncertainties.  The actual impact of the Year 2000 issue on ACNB could
materially  differ  from  that  which is  anticipated  in these  forward-looking
statements as a result of certain factors identified below.

     The "Year  2000  Issue" is the  result of  computer  programs  having  been
written using two digits rather than four to define the applicable  year. Any of
ACNB's  computer  systems that have  date-sensitive  software or  date-sensitive
hardware  may  recognize a date using "00" as the Year 1900 rather than the Year
2000.  This  could  result  in  a  system  failure  or  miscalculations  causing
disruptions of operations,  including, among other things, a temporary inability
to process transactions,  send statements,  or engage in similar normal business
activities.

     Based  on an  ongoing  assessment,  ACNB  has  determined  that  it will be
required to modify or replace  portions of its software and hardware so that its
computer  systems  will  properly  use dates  beyond  December  31,  1999.  ACNB
presently  believes that as a result of modifications  to existing  software and
hardware and  conversions to new software and hardware,  the Year 2000 Issue can
be mitigated.  However,  if such  modifications and conversions are not made, or
are not completed on a timely  basis,  the Year 2000 Issue could have a material
adverse impact on the operations of ACNB.

     ACNB has initiated formal  communications with all of its vendors and large
commercial  customers to  determine  the extent to which ACNB is  vulnerable  to
those third  parties'  failure to  remediate  their own Year 2000 Issue.  ACNB's
estimated Year 2000 project costs include the costs and time associated with the
impact of a third party's Year 2000 Issue, and are based on presently  available
information.

     For  significant  vendors,  ACNB  will  validate  that  they are Year  2000
compliant  by  December  31,  1998,  or make  plans to switch to a new vendor or
system that is compliant.  For insignificant  vendors, ACNB will not necessarily
validate  that  they are Year 2000  compliant.  However,  for any  insignificant
vendor who responds  that they will not be compliant by December 31, 1998,  ACNB
will seek a new vendor or system that is compliant.  For large  commercial  loan
customers, ACNB will take appropriate action based upon the customer's response.

     ACNB  will use both  internal  and  external  resources  to  reprogram,  or
replace,  and test its  software  and  hardware  for  Year  2000  modifications.
Concurrent  with the Year 2000  project,  ACNB will also be  converting  all its
major  data  processing  systems,   both  hardware  and  software,   to  current
technology. ACNB plans to complete both the Year 2000 and systems conversion

                                       60

<PAGE>

projects  within 18 months or no later  than  June 30,  1999,  for all  critical
systems.  The total cost of the Year 2000 and  systems  conversion  projects  is
estimated at $201,000 to $296,000.  Of the total projects'  cost,  approximately
$91,000 is  attributable  to the  purchase of new  software  and  hardware.  The
remaining  $110,000 to $205,000  will be expensed as incurred  over the calendar
years  1997,  1998 and 1999.  These  costs are not  expected  to have a material
effect on the results of operations of ACNB.

     The costs of the projects and the date on which ACNB plans to complete both
the Year 2000  modifications  and systems  conversions are based on management's
best estimates,  which were derived using numerous  assumptions of future events
including  the  continued   availability  of  certain  resources,   third  party
modification  plans and other factors.  However,  there can be no guarantee that
these estimates will be achieved and actual results could differ materially from
those  plans.  Specific  factors  that  might  cause such  material  differences
include,  but are not limited to, the availability and cost of personnel trained
in this area, the ability to locate and correct all relevant computer codes, and
similar uncertainties.

     A remediation  contingency  plan has been  developed  for  mission-critical
systems, as called for by regulatory  guidelines for year 2000. Mission critical
systems include transaction  processing,  new loan and deposit  generation,  and
trust account servicing.  This contingency plan identifies  scheduled completion
dates and trigger dates.  The trigger date is the date ACNB would  implement the
contingency plan.

     A  detailed  business  resumption   contingency  plan  is  currently  under
development  with a target  completion  date of  December  31,  1998.  This plan
includes   required   mainframe   and   PC   based   applications,   third-party
relationships,   environmental   and   proprietary   programs.   The  resumption
contingency  plan  calculates a risk factor for each core  business  line and/or
product.  Based  upon the  calculated  risk  factor,  such  business  resumption
contingency plan will be designed and tested.

     As a bank holding  company,  ACNB and its  subsidiaries  are subject to the
regulation and oversight of various banking regulators. Their oversight includes
the provision of specific timetables,  programs and guidance regarding Year 2000
issues.


                                       61

<PAGE>

                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                       OF FINANCIAL CONDITION AND RESULTS
                            OF OPERATIONS OF FARMERS

     The following  pages of this report  present  management's  discussion  and
analysis of the  consolidated  financial  condition and results of operations of
Farmers, and its wholly-owned subsidiary FNB.

     Farmers  is  a  one-bank   holding  company   headquartered   in  Newville,
Pennsylvania.  Farmers'  wholly-owned  subsidiary  is  FNB.  FNB is  engaged  in
commercial  banking  activities that provide financial services to both consumer
and commercial customers. As a national bank, FNB is subject to the supervision,
examination and regulation of the Office of the Comptroller of the Currency. The
Bank is a member  of the FDIC  and the  deposits  of the  Bank's  customers  are
insured by the agency.

     The  following  discussion  is intended to focus on and  highlight  certain
information  regarding  Farmers.  This discussion  should be read in conjunction
with the Consolidated Financial Statements and related notes appearing elsewhere
in this report.

     Certain   statements   in   this   document   may  be   considered   to  be
"forward-looking  statements"  as  that  term is  defined  in the  U.S.  Private
Securities  Litigation  Reform Act of 1995,  such as statements that include the
words  "expect",  "estimate",  "project",   "anticipate",   "should",  "intend",
"probability",   "risk",  "target",   "objective"  and  similar  expressions  or
variations  on  such   expressions.   In  particular,   this  document  includes
forward-looking  statements  relating,  but not limited to,  Farmers'  potential
exposures  to various  types of market  risks,  such as  interest  rate risk and
credit risk. Such statements are subject to certain risks and uncertainties. For
example,  certain of the market risk  disclosures are dependent on choices about
key  model   characteristics   and   assumptions  and  are  subject  to  various
limitations.  By their nature,  certain of the market risk  disclosures are only
estimates and could be  materially  different  from what actually  occurs in the
future. As a result, actual income gains and losses could materially differ from
those that have been estimated. Other factors that could cause actual results to
differ  materially  from  those  estimated  by  the  forward-looking  statements
contained in this document  include,  but are not limited to:  general  economic
conditions in market areas in which Farmers has significant  business activities
or  investments;  the  monetary  and  interest  rate  policies  of the  Board of
Governors of the Federal Reserve  System;  inflation;  deflation;  unanticipated
turbulence in interest rates; changes in laws, regulations and taxes; changes in
competition and pricing environments;  natural disasters; the inability to hedge
certain  risks  economically;  the adequacy of loss  reserves;  acquisitions  or
restructurings;  technological changes;  changes in consumer spending and saving
habits;  and the  success of  Farmers  in  managing  the risks  involved  in the
foregoing.


                                       62

<PAGE>


Balance Sheet Analysis

     Investment Securities

     Farmers  National  Bancorp,  Inc.  (the Bank)  follows  the  provisions  of
Statement of Financial  Accounting  Standards  "SFAS" No. 115,  "Accounting  for
Certain  Investments in Debt and Equity  Securities," which requires among other
things,  that debt and equity  securities  classified  as available  for sale be
reported at fair value with  unrealized  gains and losses excluded from earnings
and reported in a separate  component  of  shareholders,  equity,  net of income
taxes.  The net  effect of  unrealized  gains or  losses,  caused by  marking an
available  for sale  portfolio to market,  causes  fluctuations  in the level of
shareholders' equity and equity-related  financial ratios as the market value of
the  securities  fluctuate.  As of June 30, 1998,  the  application  of SFAS 115
resulted in an increase in shareholders' equity of $5,000.

     Total securities of $17,525,000  decreased $2,273,000 from June 30, 1997 to
June 30,  1998.  The June 30, 1997 level of  securities  was also lower than the
total  securities at December 31, 1996 and 1997 of $18,334,000 and  $19,842,000,
respectively.

     Investment securities for the period ended December 31, 1997 are summarized
as follows:

<TABLE>

FARMERS NATIONAL BANCORP, INC.
INVESTMENT SECURITIES
<CAPTION>
                            U.S.
                         Government                                     Taxable
                         and Federal   State and      Other           Equivalent
December 31, 1997         Agencies     Municipal   Securities   Total    Yield
 (in thousands)
- --------------------------------------------------------------------------------
<S>                      <C>            <C>          <C>       <C>      <C>
Amortized Cost

Within one year           $5,366        $1,210       $150      $6,726    5.99%
After one year through
 five years                8,860         2,666        234      11,760    6.27%
After five years through
 ten years                     0             0          0           0    0.00%
After ten years            1,104           204          0       1,308    8.61%
No set maturity                0             0         37          37    5.14%
                          ------        ------       -----     ------

Total                    $15,330        $4,080       $421     $19,831
                         
Fair Value               $15,504        $4,107       $421     $20,032
                        
Taxable equivalent
 yield                      6.27%        6.52%       5.96%

</TABLE>


The weighted  average yield of tax exempt  obligations  has been calculated on a
taxable equivalent basis using an effective tax rate of 34%.

     The June 30, 1998 federal  funds sold of  $5,308,000  exceeded the June 30,
1997 balance of $2,807,000. Federal funds sold at June 30, 1998 were also higher
than the  December  31, 1997  balance of  $1,790,000  and the  December 31, 1996
balance  of  $3,681,000.  Federal  funds  averaged  $2,876,000  for  all of 1997
compared to $3,468,000 in 1996.  June,  1998 year to date average  federal funds
sold was $3,300,000.

                                       63

<PAGE>

     Interest-bearing  deposits  in banks of  $625,000  at June 30,  1998,  were
higher than June 30, 1997  balance  when there were more.  The December 31, 1997
and 1996 balances were $625,000 and $32,000, respectively.

     Loans

     The Bank grants installment,  commercial and residential loans to customers
primarily in  Cumberland  County,  Pennsylvania,  and its  contiguous  counties.
Although the Bank has a diversified loan portfolio, a substantial portion of its
debtors'  ability to honor their  contracts is  dependent on the local  economy.
There are no  concentrations of loans to any one industry group which exceed 10%
of total loans.

     Loans grew 3.9% from  $15,843,000  at June 30, 1997 to  $16,457,000 at June
30, 1998. Real estate loans  represented  $13,057,000 or 79.2% of total loans at
December 31, 1997.  Consumer and commercial  loans  represented  12.3% and 8.5%,
respectively,  of total  loans at  December  31,  1997.  The June 30,  1998 loan
portfolio  decreased  $29,000 from $16,486,000 at December 31, 1997. Loan demand
has been soft during the first half of 1998.

     Major  classifications  of loans are  summarized as follows at December 31,
1995, 1996 and 1997:

<TABLE>
<CAPTION>

In thousands                           1997             1996              1995
                                      -----            ------             ----
<S>                                 <C>                <C>              <C>
Consumer                             $1,440            $1,191           $1,139
Commercial and financial              1,402             1,238            1,168
Real estate - commercial              2,229             2,334            1,867
Real estate - residential            10,828            10,260           10,239
Student loans                           587               589              578
                                     ------            ------           -------
     Total loans                    $16,486           $15,612          $14,991
                                    =======           =======          =======
</TABLE>


The  following  table  outlines  the  repricing   opportunities  for  all  loans
outstanding as of December 31, 1997. Loans with immediately adjustable rates are
included in the within one year column.  Loans with rates that are adjustable at
some time over the life of the loan are  included  under the  heading  when they
become adjustable.  All fixed rate loans are included under the heading in which
they mature.


                                       64

<PAGE>

<TABLE>

                                              Repricing Period
                         -------------------------------------------------------
                           Within      After One
                            One      Year Through     After Five
In thousands               Year       Five Years        Years            Total
                         ---------   ------------     ----------      ---------
<S>                        <C>          <C>            <C>             <C>
Consumer                  $   81        $1,154           $205          $1,440
Commercial and financial     621           371            410           1,402
Real estate - commercial      39            51          2,139           2,229
Real estate - residential    496           349          9,983          10,828
Student loans                384            31            172             587
                            -----       ------         ------         --------
     Total loans          $1,621        $1,956        $12,909         $16,486
                         

Loans with predetermined
 interest rates             $441        $1,956        $12,909         $15,306
Loans with variable
 interest rates            1,180             0              0           1,180
                         -------        -------       -------         -------
     Total loans          $1,621        $1,956        $12,909         $16,486
                        
</TABLE>

     Allowance for Possible Loan Losses

     The  provision  for loan  losses is based upon a credit  review of the loan
portfolio,  past loan loss  experience,  current  economic  conditions and other
pertinent  factors  which  form a basis  for  determining  the  adequacy  of the
allowance for possible loan losses. In the opinion of management,  the aggregate
amount reserved is deemed to be adequate to absorb future loan losses.

     The  allowance  for  possible  loan losses of $178,000 at June 30, 1998 and
$186,000 at June 30, 1997 were 1.08% and 1.17%,  respectively,  of total  loans.
The $176,000  allowance  for possible loan losses at December 31, 1997 was 1.06%
of loans and the  $193,000  allowance  for loan losses at December  31, 1996 was
1.23% of loans.


                                       65

<PAGE>

     Transactions in the valuation  portion of the allowance for loan losses for
the past three years at December 31, are shown below:

<TABLE>
<CAPTION>

In thousands                            1997             1996              1995
                                        -----            ----             -----

<S>                                     <C>               <C>              <C>
Balance of allowance for
loan losses at beginning of period      $193              $201             $203
                                       ------             ----             ----
  
Loans charged off:

     Consumer                             21                11                8
     Commercial and financial              0                 0                0
     Real estate - commercial              0                 0                0
     Real estate - residential             0                 0                0
     Student loans                         0                 0                0
                                        ----               ---             ----
         Total loans charged off          21                11                8
                                        

Recoveries of charged off loans:

     Consumer                              4                 3                6
     Commercial and financial              0                 0                0
     Real estate - commercial              0                 0                0
     Real estate - residential             0                 0                0
     Student loans                         0                 0                0
                                        -----               ---            ----
          Total recoveries                 4                 3                6
                                        
Net loans charged off                     17                 8                2

Provision for possible loan losses         0                 0                0
                                       

Balance of allowance for loan
 losses at end  of period                $176              $193            $201
                                         ====              ====            ====


TOTAL LOAN BALANCES   (in thousands)
- --------------------------------------------------------------------------------
     Average total loans              $16,016            $15,350         $14,484
     Total loans at year end           16,486             15,612          14,991


RATIOS
- --------------------------------------------------------------------------------
 Net charge offs to:

     Average total loans                 0.11%             0.05%           0.01%
     Total loans at year end             0.10%             0.05%           0.01%
     Allowance for loan losses           9.66%             4.15%           1.00%

Allowance for loan losses to:

     Average total loans                 1.10%             1.26%           1.39%
     Total loans at year end             1.07%             1.24%           1.34%

</TABLE>

                                       66

<PAGE>

     Allocation of the  allowance for loan losses for years 1997,  1996 and 1995
is shown below:

<TABLE>
<CAPTION>

                                  1997               1996             1995
                                 -----               ----             ----
                                     % of               % of              % of
(In thousands)                       Gross              Gross             Gross
                            Amount   Loans      Amount  Loans    Amount   Loans
                            --------------      -------------    ---------------
<S>                      <C>        <C>          <C>   <C>         <C>    <C>
Consumer                   $7        0.04%         $9   0.06%       $7     0.05%
Commercial and financial    9        0.05%          5   0.03%       21     0.14%
Real estate - commercial    0        0.00%          0   0.00%        0     0.00%
Real estate - residential  26        0.16%         25   0.16%       24     0.16%
Student loans               0        0.00%          0   0.00%        0     0.00%
Unallocated               134        0.81%        154   0.99%      149     0.99%
                        -----      -------       ----   -----      ---     -----

     Total               $176        1.07%       $193   1.24%     $201     1.34%
                       
</TABLE>

     Nonperforming Assets

     The following table presents information concerning the aggregate amount of
nonperforming assets at December 31:

<TABLE>
<CAPTION>
In thousands                        1997             1996              1995
                                   -----             ----              ----

<S>                                <C>               <C>              <C>
Nonaccrual loans                    $268             $ 98              $  0
90 days past due still accruing      163              340               168
Restructured loans                     0                0                 0
Other real estate owned                0                0                 0
                                    ----             -----            ------
     Total nonperforming assets     $431             $438              $168
                                   

</TABLE>

     The gross interest income that would have been recorded on nonaccrual loans
at December 31, 1997 and 1996 under original terms was approximately $25 and $9,
respectively. The amounts of interest income on these loans that was included in
net income for those years was approximately $15 and $8, respectively.

     Time Deposits

     Total deposits of  $36,657,000  at June 30, 1998 were $881,000  higher than
the $35,776,000 deposit level at June 30, 1997. The increase was due mainly to a
$929,000 gain in time deposits.  The June 30, 1998 deposits grew $1,176,000 from
the December 31, 1997 balance

                                       67

<PAGE>


of  $35,481,000   and  $416,000  from  December  31,  1996  deposit  balance  of
$35,360,000 to June 30, 1997.

     Time  deposits  in  denominations  of  $100,000  or more at December 31 are
summarized as follows:


In thousands                 
                                            1997               1996
                                            ----               ----

Time certificates of deposit              $1,822             $1,161
Other time deposits                          100                100

Maturities of time deposits of $100,000
 or more outstanding at December 31, 1997
 are summarized as follows:

Three months or less                     $   235
Over three through six months            $   213
Over six through twelve months           $   749
Over twelve months                       $   725
                                         -------

          Total                           $1,922

     Capital

     Various  regulatory  agencies require banks to maintain a leverage ratio of
core  capital to total  assets at a prescribed  level,  currently 4 percent.  In
addition, bank regulators have issued risk-based capital guidelines.  Under such
guidelines,  minimum  ratios of core capital and total  qualifying  capital as a
percentage  of  risk-weighted  assets and certain  off-balance-sheet  items of 4
percent and 8 percent, respectively, are required.

     At June 30,  1998,  the Bank met all  capital  requirements.  Shareholders'
equity was $5,681,000 or 13.3% of total assets and 33.1% of total  risk-weighted
assets, while total qualifying capital was 34.2% of total risk-weighted assets.

Income Statement Analysis

     Results of Operations

     Net income for the six month period  ending June 30, 1998 of $293,000,  was
$2,000 less than the  $295,000  net income for the same  period  ending June 30,
1997.  Net  interest  income was up $7,000,  but was offset by a greater rise in
non-interest  expense. The annualized return on average shareholders' equity was
10.52% at June 30, 1998, compared to 11.38% at June 30,

                                       68

<PAGE>


1997.  The December 31, 1997 net income of $541,000 was higher than the December
31, 1996 and 1995 net income of $480,000 and  $415,000,  respectively.  Earnings
per share were $1.18 for the first six months of 1998, compared to $1.19 for the
same period in 1997.

     Net Interest Income

     Net interest income at June 30, 1998 of $822,000 was $7,000 higher than the
June 30, 1997 net interest income of $815,000. This increase is primarily due to
the  change in the mix of  earning  assets  during the first six months of 1998,
compared to the same period in 1997. Lower yielding average investments balances
were $383,000 lower in the first six months of 1998, compared to the same period
of 1997.  This  reduction  in funds,  plus  deposit  growth,  was used to fund a
$752,000  increase in the average higher yielding loans during this period.  The
net interest margin narrowed from 4.39% for the six month period ending June 30,
1997, to 4.32% for the same period in 1998.

     Net interest  income at December 31, 1997 of $1,663,000 was higher than the
December 31, 1996 and 1995 net interest  income of  $1,538,000  and  $1,481,000,
respectively.  The net  interest  margin  for the  twelve  month  period  ending
December  31, 1997 of 4.48% was higher  than the 4.31% at December  31, 1996 and
the 4.41% at December 31, 1995.

     Provision for Loan Losses

     The  provision  for loan  losses for the first six months of 1998 was $-0-,
compared to $-0- for the same period in 1997.  The provision for loan losses for
the entire year of 1997, 1996 and 1995 was $-0-.

     Other Income

     Other income  increased  15.2% from $79,000  during the first six months of
1997, to $91,000 during the same period in 1998. This increase was the result of
an increase in fee income but in no  particular  fee type.  Other income for the
entire year of 1997 of $141,000  was  $19,000  higher than 1996 other  income of
$122,000.

     Other Operating Expenses

     Other  expenses of $507,000  for the first six months of 1998,  was $28,000
higher than the same period in 1997.  This  increase in 1998 is the result of an
increase in salaries and employee  benefits.  Other expenses for the entire year
of 1997 of  $1,047,000  was $71,000  higher  than the same  period in 1996.  The
increase in other expenses in 1997 is related to salaries and employee benefits.

                                       69

<PAGE>

                           ADJOURNMENT OF THE MEETING

     Approval of the Agreement  requires the affirmative  vote of the holders of
66 2/3% of all  outstanding  shares of the Farmers Common Stock.  If there is an
insufficient  number  of votes  cast in  person  or by proxy at the  Meeting  to
approve the  Agreement,  the Farmers  Board of Directors  intends to adjourn the
Meeting to a later date to permit further  solicitation of votes in favor of the
Agreement.  The  affirmative  vote of a majority of the shares  represented  and
voting at the Meeting is required in order to approve any such adjournment.  The
place and date to which the Meeting would be adjourned would be announced at the
Meeting.  Under the Farmers Bylaws, it shall not be necessary to give any notice
of the time and place of the adjourned  meeting other than the  announcement  at
the Meeting.

     The Farmers Board of Directors  recommends that shareholders vote "FOR" the
proposal to adjourn the Meeting if necessary to permit further  solicitation  of
proxies to approve the Agreement.

                             INDEPENDENT ACCOUNTANTS

     ACNB has engaged Stambaugh o Ness, P.C., independent accountants,  to audit
its financial statements for the year ended December 31, 1998.

     Farmers has engaged Greenawalt & Company, P.C., independent accountants, to
audit its financial statements for the year ended December 31, 1998.

                                     EXPERTS

     The  consolidated  balance sheets of ACNB as of December 31, 1997, and 1996
and the related  consolidated  statements  of income,  changes in  shareholders'
equity and cash flows for each of the three years in the period  ended  December
31, 1997,  incorporated  by reference in this Proxy  Statement/Prospectus,  have
been  incorporated  herein in reliance on the report of Stambaugh o Ness,  P.C.,
independent  accountants,  given upon the  authority  of that firm as experts in
accounting and auditing.

     The  consolidated  balance  sheet of Farmers as of December 31,  1997,  and
1996,   and  the  related   consolidated   statements  of  income,   changes  in
shareholders'  equity  and cash  flows for each of the  years in the  three-year
period ended  December 31, 1997,  appearing in this Proxy  Statement/Prospectus,
have been  included  herein in reliance on the report of  Greenawalt  & Company,
P.C., independent accountants,  given upon the authority of that firm as experts
in accounting and auditing.

                                 LEGAL OPINIONS

     The legality of the ACNB Common Stock to be issued in  connection  with the
Merger is being passed upon by Shumaker Williams, P.C., Camp Hill, Pennsylvania,
counsel to ACNB.

                                       70

<PAGE>

                                  OTHER MATTERS

     The Board of  Directors  of Farmers  knows of no other  matters  than those
discussed  in this  Proxy  Statement/Prospectus  that will be  presented  at the
Meeting.  However,  if any other matters are properly brought before the Meeting
and any  adjournment or postponement  thereof,  any proxy given pursuant to this
solicitation will be voted in accordance with the  recommendations of management
of Farmers.

                             ADDITIONAL INFORMATION

     ACNB has filed a  Registration  Statement with the Commission in respect of
the shares of ACNB Common Stock to be issued in connection with the Merger.  The
Registration  Statement  contains certain  additional  information that has been
omitted from this Proxy  Statement/Prospectus  in accordance  with the rules and
regulations of the Commission. The Registration Statement may be examined at the
Commission  in  Washington,  D.C.  Copies of the  Registration  Statement may be
obtained  from the  Commission  upon  payment of the  prescribed  fee or free of
charge from the Commission website: http://www.sec.gov.


                                       71

<PAGE>
               
                      INDEX TO FINANCIAL STATEMENTS
                         FARMERS NATIONAL BANCORP, INC.

                                                                              
                                                                     Page

Independent Auditors' Report...................................        F-2

Consolidated Balance Sheets -
     December 31, 1997 and 1996  ..............................        F-3

Consolidated Statements Of Income -
     years ended December 31, 1997, 1996 and 1995  ............        F-4

Consolidated Statement of Changes in Shareholders' Equity -
     years ended December 31, 1995, 1996 and 1997..............        F-5

Consolidated Statements of Cash Flows
     years ended December 31, 1997, 1996 and 1995  ............        F-6

Notes to Consolidated Financial Statements -
     December 31, 1997, 1996 and 1995  .........................   F-7-F-25


<PAGE>

                           GREENAWALT & COMPANY, P.C.
                          Certified Public Accountants
                                   P. O. Box 6
                              400 West Main Street
                        Mechanicsburg, Pennsylvania 17055


                          INDEPENDENT AUDITORS' REPORT


Shareholders
Farmers National Bancorp, Inc.
Newville, Pennsylvania

     We have audited the  accompanying  consolidated  balance  sheets of Farmers
National  Bancorp,  Inc. and subsidiary as of December 31, 1997 and 1996 and the
related consolidated  statements of income,  changes in shareholders' equity and
cash flows for each of the three years in the period  ended  December  31, 1997.
These  financial   statements  are  the   responsibility  of  the  Corporation's
management.  Our  responsibility  is to express  an  opinion on these  financial
statements based on our audit.

     We conducted  our audits in accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion,  the financial statements referred to above present fairly,
in all material  respects,  the financial  position of Farmers National Bancorp,
Inc.  and  subsidiary  as of  December  31,  1997 and 1996 and the  consolidated
results of their  operations and their  consolidated  cash flows for each of the
three years in the period ended December 31, 1997, in conformity  with generally
accepted accounting principles.


                                           ----------------------------------
                                           GREENAWALT & COMPANY, P.C.

January 8, 1998, except for Note 20,
     as to which the date is September 23, 1998

Mechanicsburg, Pennsylvania

                                       F-2

<PAGE>


   
<TABLE>

                         FARMERS NATIONAL BANCORP, INC.
                           CONSOLIDATED BALANCE SHEETS
                           DECEMBER 31, 1997 AND 1996

                                                   1997                  1996
                                               ----------------      ----------
                                     ASSETS
                                   ---------
<S>                                          <C>                 <C>
Cash and due from banks                      $  1,712,543         $  2,413,926
Federal funds sold                              1,790,000            3,681,000
Interest bearing deposits                         625,000                  -0-
                                             ------------     ----------------
  Total cash and cash equivalents               4,127,543            6,094,926
Interest bearing deposits                             -0-               32,000
Investment securities being held to maturity   14,180,762           14,421,356
Investment securities available for sale        5,661,613            3,912,976
Loans, net                                     16,310,565           15,419,045
Premises and equipment                            401,063              357,224
Accrued interest receivable                       370,306              342,603
Other assets                                      168,742              149,732
                                             ------------         ------------
                   Total assets              $ 41,220,594         $ 40,729,862
                                               ==========           ==========

                      LIABILITIES AND SHAREHOLDERS' EQUITY
                    ---------------------------------------
Deposits
     Demand, noninterest bearing             $  7,165,850         $  6,858,200
     Demand, interest bearing                   5,976,360            6,784,065
     Savings                                    6,525,927            6,521,984
     Time                                      15,813,165           15,195,854
                                               ----------           ----------
                   Total deposits              35,481,302           35,360,103
Accrued interest payable                          132,519              132,998
Other liabilities                                 142,564              147,182
                                             ------------         ------------
                   Total liabilities           35,756,385           35,640,283
                                               ----------           ----------
Shareholders' equity
     Common stock, $.50 par value,
      1,000,000 shares authorized,
      250,000 shares  issued and outstanding      125,000              125,000
     Surplus                                      710,000              710,000
     Retained earnings                          4,671,895            4,255,017
     Net unrealized gain (loss) on securities
      available for sale                            7,314                 (438)
                                            ---------------      --------------
                                                5,514,209            5,089,579
     Less: Treasury stock, 2,000
      shares, at cost                             (50,000)                 -0-
                                              ------------     ----------------
   Total shareholders' equity                   5,464,209            5,089,579
                                               -----------          -----------
   Total liabilities and shareholders'
      equity                                 $ 41,220,594         $ 40,729,862
                                               ==========           ==========

The accompanying notes are an integral part of these financial statements.
</TABLE>


                                      F-3
<PAGE>
<TABLE>
<CAPTION>

                         FARMERS NATIONAL BANCORP, INC.
                        CONSOLIDATED STATEMENTS OF INCOME
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995

                                     1997               1996              1995
                                  ------------       ------------     ---------
<S>                               <C>              <C>            <C>
Interest income
 Loans, including fees            $ 1,526,438      $ 1,486,243     $ 1,410,916
 Investment securities
   - taxable                          999,404          910,452         792,451
 Investment securities - tax exempt   140,010           88,385         108,521
 Federal funds sold                   155,626          183,255         179,444
 Interest bearing deposits              2,864           10,653          42,468
                                  ------------      -----------     -----------
    Total interest income           2,824,342        2,678,988       2,533,800
                                    ---------        ---------       ---------
Interest expense on deposits
    Demand                            175,963          178,376         233,813
    Savings                           181,596          189,127         212,281
    Time                              804,129          773,344         606,597
                                   ----------       ----------       ----------
    Total interest expense          1,161,688        1,140,847       1,052,691
                                                                                
    Net interest income             1,662,654        1,538,141       1,481,109
Provision for possible
 loan losses                             -0-             -0-              -0-
                               ---------------  --------------- ---------------
    Net interest income
    after provision
    for possible loan losses        1,662,654        1,538,141       1,481,109
                                    ---------        ---------       ---------
Other income
   Exchange                           113,728           97,202          75,992
   Service charges and fees            27,047           24,761          19,743
   Gain (loss) on sales of securities    -0-              -0-          (41,974)
                                --------------   --------------     ----------
     Total other income               140,775          121,963          53,761
                                   ----------        ----------    -----------
Other expense
   Salaries and employee benefits     615,229          555,834         533,662
   Occupancy expenses, net             40,849           34,230          29,672
   Equipment expenses                  85,514           99,008          76,345
   Federal deposit insurance
     assessment                         3,872            2,000          37,322
   Other expenses                     301,478          284,470         268,131
                                   ----------       ----------      ----------
    Total other expense             1,046,942          975,542         945,132
                                    ---------       ----------      ----------
    Income before income taxes        756,487          684,562         589,738
Applicable federal income taxes       215,609          204,808         175,209
                                   ----------       ----------      ----------
               Net income        $    540,878     $    479,754    $    414,529
                                   ==========       ==========      ==========
      Net income per share       $       2.18     $       1.92    $       1.66
                                =============    =============   =============

The accompanying notes are an integral part of these financial statements.
</TABLE>


                                      F-4
<PAGE>
<TABLE>

                         FARMERS NATIONAL BANCORP, INC.
           CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY
                  YEARS ENDED DECEMBER 31, 1995, 1996 AND 1997


<CAPTION>

                                       Common                      Retained
                                       Stock        Surplus        Earnings
                                      -------       -------       ----------
<S>                                  <C>            <C>           <C>
Balance, January 1, 1995              $125,000      $710,000      $3,579,484

Net income, 1995                                                     414,529

Cash dividends,
      $.425 per share                                              (106,250)

Change in net unrealized
     gain (loss) on securities
     available-for-sale
                                  ------------ -------------  ----------------

Balance, December 31, 1995             125,000       710,000       3,887,763

Net income, 1996                                                     479,754

Cash dividends,
      $.45 per share                                               (112,500)

Change in net unrealized
     gain (loss) on securities
     available-for-sale
                                  ------------- ------------  -----------------

Balance, December 31, 1996             125,000       710,000       4,255,017

Net income, 1997                                                     540,878

 Cash dividends,
   $.50 per share                                                   (124,000)

Purchase of 2,000 shares
     of Treasury Stock
     gain (loss) on securities
     available-for-sale
                                   ------------- -----------      -----------

Balance, December 31, 1997           $ 125,000     $ 710,000     $ 4,671,895
                                       =======       =======       =========


<CAPTION>

                         FARMERS NATIONAL BANCORP, INC.
           CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY
                  YEARS ENDED DECEMBER 31, 1995, 1996 AND 1997


                                     Net Unrealized
                                     Gains (Losses)
                                     on Securities                   Total
                                      Available-       Treasury   Shareholders'
                                      for-Sale          Stock        Equity
                                   ----------------    --------   ------------
<S>                                <C>                <C>         <C>
Balance, January 1, 1995           $    (101,135)     $    -0-    $ 4,313,349

Net income, 1995                                                      414,529

Cash dividends,
      $.425 per share                                                (106,250)

Change in net unrealized
     gain (loss) on securities
     available-for-sale                  103,590                      103,590
                                   -------------     ------------ ------------

Balance, December 31, 1995                 2,455          -0-       4,725,218

Net income, 1996                                                      479,754

Cash dividends,
      $.45 per share                                                 (112,500)

Change in net unrealized
     gain (loss) on securities
     available-for-sale                   (2,893)                      (2,893)
                                  ----------------- --------------  ----------

Balance, December 31, 1996                  (438)         -0-       5,089,579

Net income, 1997                                                      540,878

Cash dividends,
      $.50 per share                                                 (124,000)

Purchase of 2,000 shares
     of Treasury Stock                               (50,000)         (50,000)

Change in net unrealized
     gain (loss) on securities
     available-for-sale                    7,752                        7,752
                                   --------------    ----------  -------------

Balance, December 31, 1997       $         7,314   $ (50,000)     $ 5,464,209
                                  ===============   ==========     ===========

The accompanying notes are an integral part of these financial statements.

                                      F-5

</TABLE>

<PAGE>


                         FARMERS NATIONAL BANCORP, INC.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995

                                         1997           1996           1995
                                        -----          -----           ----

Cash flows from operating activities
 Net income                      $    540,878    $    479,754  $     414,529
 Adjustments to reconcile
  net income to net cash provided
   (used) by operating activities
 Depreciation, amortization and
   accretion                           87,416         161,269        246,294
 Deferred taxes                        (2,861)         (1,027)        (3,162)
 (Gains) losses on sales of
   securities                             -0-              -0-        41,974
 Increase (decrease) in accrued
   interest payable                     (479)          20,532         49,051
 Increase (decrease) in other
   liabilities                        (4,618)           3,764        (10,065)
 Decrease (increase) in accrued
   interest receivable               (27,703)         (40,101)        47,791
 Decrease (increase) in
   other assets                      (20,143)          30,836        (35,472)
                                 ------------      ------------     ----------

  Net cash provided by (used in)
   operating activities              572,490          655,027        750,940
                                 ------------       -----------     ----------

Cash flows from investing activities
  Securities held to maturity
   Proceeds from maturities        6,235,000        4,855,000      5,950,000
   Purchases                      (6,034,931)      (5,585,859)    (4,175,967)
  Securities available for sale
   Proceeds from maturities        2,300,000          650,000        115,000
   Proceeds from sales                -0-               -0-        2,720,999
   Purchases                      (4,038,020)      (2,590,595)    (1,850,000)
  Net decrease (increase) in
   interest bearing deposits          32,000          322,000        409,975
  Net decrease (increase) in loans  (891,520)        (629,526)      (634,414)
  Purchases of premises and
   equipment                         (89,601)         (34,853)      (104,633)
                                 ------------      -----------      ---------

    Net cash provided by (used in)
    investing activities          (2,487,072)      (3,013,833)     2,430,960
                                  ----------        ----------     ---------

Cash flows from financing activities
 Net increase (decrease)
  in deposits                        121,199        2,470,119        239,189
 Purchase of treasury stock          (50,000)            -0-            -0-
 Dividends paid                     (124,000)       (112,500)       (106,250)
                                 -----------        ---------       ---------

    Net cash provided by
     (used in) financing
     activities                      (52,801)      2,357,619         132,939
                                ------------       ---------       ----------

    Net increase (decrease)
     in cash and cash
     equivalents                  (1,967,383)         (1,187)      3,314,839

    Cash and cash equivalents,
      beginning                    6,094,926       6,096,113       2,781,274
                                  ----------       ---------       ---------

    Cash and cash equivalents,
      ending                     $ 4,127,543     $ 6,094,926     $ 6,096,113
                                   =========       =========       =========

The accompanying notes are an integral part of these financial statements.

                                      F-6

<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                        DECEMBER 31, 1997, 1996 AND 1995

1.   Summary of significant accounting policies

     Farmers National  Bancorp,  Inc. and its wholly-owned  subsidiary,  Farmers
     National Bank,  provide loan, deposit and other commercial banking services
     through one full  service and three  limited  service  offices in Newville,
     Cumberland  County.  The Corporation  competes with several other financial
     institutions   to  provide  its   services  to   individuals,   businesses,
     municipalities and other organizations.

     The  accounting  and reporting  policies  followed by the  Corporation  and
     subsidiary  conform to  generally  accepted  accounting  principles  and to
     general  practices within the banking  industry.  The following  paragraphs
     briefly describe the more significant accounting policies:

Basis of financial statement presentation

     The Corporation's consolidated financial statements include the accounts of
     the parent corporation and its subsidiary.  Material  intercompany accounts
     and transactions have been eliminated.

     In  preparing  the  financial  statements,  management  is required to make
     estimates and  assumptions  that affect the reported  amounts of assets and
     liabilities  as of the balance sheet date,  and income and expenses for the
     period then ended.  Actual  results could differ  significantly  from those
     estimates.  The  material  estimate  that is  particularly  susceptible  to
     significant  change  relates  to the  determination  of the  allowance  for
     possible loan losses.

Cash and cash equivalents

     Cash and cash  equivalents,  for  purposes of the  statement of cash flows,
     consists  of the Bank's  cash and due from banks and  federal  funds  sold.
     Generally, federal funds are purchased and sold for one day periods.

Investment securities

     Investment  securities  available  for sale are those  securities  that the
     Corporation  intends  to hold for an  indefinite  period  of time,  but not
     necessarily  to  maturity.  Any decision to sell a security  classified  as
     available for sale would be based on various factors,  including  movements
     in interest rates,  changes in the maturity mix of the Corporation's assets
     and  liabilities,  liquidity  needs,  regulatory  considerations  and other
     similar factors.  Investment  securities  available for sale are carried at
     fair  value.  Unrealized  gains  or  losses  are  reported  as  changes  in
     shareholders'  equity net of the related deferred tax effect.  Any realized
     gains or losses,  based on the amortized cost of specific  securities sold,
     are included in current operations.

                                      F-7
<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

1.   Summary of significant  accounting policies (Cont'd.)
     Investment securities (Cont'd.)

     Investment  securities  held to  maturity  are  those  securities  that the
     Corporation has both the intent and ability to hold to maturity  regardless
     of  changes  in market  conditions,  liquidity  needs or changes in general
     economic  conditions.  These  securities  are carried at cost  adjusted for
     amortization of premiums and accretion of discounts,  which are included as
     adjustments to interest income over their contractual lives.

Loans

     Loans are  stated at face value net of any  unearned  income.  Interest  is
     computed  based on the principal  balances  outstanding  and is credited to
     income as earned.  Loan fees collected net of the costs of originating  the
     loans are  deferred and  recognized  as an  adjustment  of the yield on the
     related loan.

     The accrual of  interest on loans is  discontinued  when,  in  management's
     judgment,  it is  determined  that  the  collection  of  interest,  but not
     necessarily principal, is doubtful.

Allowance for possible loan losses

     The allowance  for possible  loan losses is maintained at a level  believed
     adequate by management to absorb  potential  losses in the loan  portfolio.
     Management's  determination of the adequacy of the allowance is based on an
     evaluation of the portfolio,  past loan loss  experience,  current economic
     conditions,   volume,   growth  and  composition  of  the  loan  portfolio,
     collateral pledged,  and other relevant factors. The allowance is increased
     by provisions  charged to operations and the recovery of amounts previously
     charged  off.  The  allowance  is  decreased  by  loans  charged  off  when
     management's evaluation reflects permanent impairment of loan principal.

Premises and equipment

     Premises,  equipment  and  leasehold  improvements  are stated at cost less
     accumulated  depreciation and amortization.  Depreciation is computed using
     the straight-line  method for financial reporting and the straight-line and
     accelerated  methods for income tax  purposes.  When property is retired or
     disposed of, the cost and related accumulated depreciation are removed from
     the accounts,  and any resulting  gain or loss is reflected in  operations.
     Major  additions  or  replacements  are  capitalized,   while  repairs  and
     maintenance are charged to expense as incurred.

                                      F-8
<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

1. Summary of significant accounting policies (Cont'd.)

     Compensated absences

          The Corporation  allows employees to accumulate unused sick days up to
          a maximum of 80 days.  Vacation days must be used annually and are not
          allowed to accumulate.  The Corporation accrues  compensated  absences
          based on the  accumulated  unused sick days at December 31 annually at
          the then existing rate of compensation.

     Federal income taxes

          The  provision  for income taxes is based on income as reported in the
          financial  statements.   Certain  items  of  income  and  expense  are
          recognized in different periods for financial  reporting purposes than
          for federal  income tax purposes.  Deferred  income taxes are provided
          for in the financial statements for such temporary differences.

     Pension Plan

          Pension plan costs for the Corporation's  defined benefit pension plan
          are accounted for in accordance with the  requirements of Statement of
          Financial  Accounting  Standards  No. 87. The  projected  unit  credit
          method is utilized for  measuring  net periodic  pension cost over the
          employee's service life. This plan was frozen in March, 1993 (See Note
          14).

          The Corporation  maintains a defined contribution pension plan (401-K)
          covering  substantially  all  employees.  Employees may elect to defer
          from 1% to 15% of compensation annually. Employer contributions to the
          plan are discretionary and are determined annually (See Note 14).

     Per share data

          Net  income  and  dividends  per share  are  computed  based  upon the
          weighted  average  number  of shares  outstanding  during  each  year,
          adjusted retroactively for stock splits and/or stock dividends.


                                      F-9

<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

1. Summary of significant accounting policies (Cont'd.)

     Off balance sheet financial instruments

          In the ordinary  course of business the  Corporation  has entered into
          off balance sheet financial  instruments  consisting of commitments to
          extend  credit  and  standby   letters  of  credit.   Such   financial
          instruments are recorded in the financial  statements when they become
          payable.

     Reclassifications

          Certain 1995 and 1996 amounts have been reclassified to conform to the
          1997 presentation.

2.   Restrictions on cash and due from banks

          The Bank is required to maintain  average  reserve  balances  with the
          Federal Reserve Bank. The average amount of these reserve balances for
          the  years  1997  and  1996   approximated   $214,000  and   $190,000,
          respectively.  In addition, the Bank's main correspondents may require
          average  compensating  balances as part of their  agreement to provide
          services.


                                      F-10

<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

3.   Investment securities

     The amortized cost and estimated  fair values of investment  securities are
     reflected in the following schedules.

                                               Gross       Gross
                                 Amortized   Unrealized  Unrealized
       Held-to-maturity             Cost       Gains       Losses   Fair  Value
      -----------------          ---------   ----------  ---------- -----------
                 1997
                -----
U.S. Treasury and other
   U.S. Government agencies    $  9,801,872  $  167,330   $ 3,858   $ 9,965,344
State and municipal               3,995,312      26,009       -0-     4,021,321
Other securities                    383,578          33       -0-       383,611
                               ------------  ----------- ---------- -----------
      Total                    $ 14,180,762  $  193,372   $ 3,858   $14,370,276
                                 ==========     =======   ========   ==========

                 1996
                 ----
U.S. Treasury and other
 U.S. Government agencies     $ 11,838,617  $  273,425   $ 29,925   $12,082,117
State and municipal              2,453,158      14,851        536     2,467,473
Other securities                   129,581         -0-        339       129,242
                              ------------  -----------  ---------  -----------
      Total                   $ 14,421,356  $ 288,276    $ 30,800  $ 14,678,832
                                ==========    =======      ======    ==========

                                               Gross        Gross
                                Amortized    Unrealized  Unrealized
  Available-for-sale              Cost         Gains       Losses   Fair  Value
  ------------------            ---------    ----------   --------  -----------
             1997
             ----
U.S. Treasury and other
    U.S. Government agencies $  5,528,284  $   11,913    $  964    $  5,539,233
State and municipal                85,187         143       -0-          85,330
Other securities                   37,050         -0-       -0-          37,050
                             ------------  ------------  ---------  -----------
      Total                  $  5,650,521  $   12,056    $  964    $  5,661,613
                               ==========   =========   ========     ==========

            1996
           -----
U.S. Treasury and other
    U.S. Government agencies $  3,793,670  $   8,000   $ 12,421   $   3,789,249
State and municipal                86,640         37       -0-           86,677
Other securities                   37,050        -0-       -0-           37,050
                             ------------  ------------ ---------  ------------
     Total                   $  3,917,360  $   8,037   $ 12,421   $   3,912,976
                               ==========  ==========    ======      ==========


                                      F-11

<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

3.   Investment securities (Cont'd.)

The  amortized  cost and fair value of debt  securities at December 31, 1997, by
contractual  maturity,  are shown below.  Expected  maturities  will differ from
contractual  maturities because issuers may have the right to prepay obligations
with or without call or prepayment penalties.

                                           Amortized
     Held-to-maturity                        Cost                  Fair Value
     ---------------                       --------                ----------

Due in one year or less                $   5,871,452             $   5,884,727
Due after one year through five years      7,001,176                 7,032,838
Due after five years through ten years           -0-                       -0-
Due after ten years                        1,308,134                 1,452,711
                                          -----------               -----------

         Total                          $ 14,180,762              $ 14,370,276
                                          ==========                ==========


                                           Amortized
     Available-for-sale                      Cost                  Fair Value
     -----------------                     --------                ----------

Due in one year or less                 $    855,104            $      856,191
Due after one year through five years      4,758,367                 4,768,372
Due after five years through ten years         -0-                       -0-
Due after ten years                            -0-                       -0-
No scheduled maturities (FRB and
     ACBB stock)                              37,050                    37,050
                                        ------------             -------------

        Total                           $  5,650,521             $   5,661,613
                                          ==========               ===========


     A  summary  of net  unrealized  gains  (losses)  on  investment  securities
     available for sale at December 31 is as follows:

                                         1997          1996           1995
                                     ------------  ------------     --------
Gross unrealized gains (losses)        $ 11,082   $     (663)      $   3,720
Related deferred tax asset (liability)   (3,768)         225          (1,265)
                                         ------      --------         ------
Net unrealized gain (loss) on         $   7,314   $     (438)      $   2,455
 securities available for sale          =======       =======         ======
     


                                      F-12

<PAGE>


                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

3.   Investment securities (Cont'd.)

          The bank is required to maintain a stock  balance of $25,050  with the
          Federal  Reserve  Bank which is included  with  investment  securities
          available-for-sale.

          Securities  with an  amortized  cost of $196,166 and $400,751 and fair
          values  of  $200,179  and  $416,394  at  December  31,  1997 and 1996,
          respectively,  were pledged as collateral for public  deposits and for
          other purposes as required or permitted by law.

4.   Loans

         Loans at December 31 consisted of the following:

                                            1997                    1996
                                    ----------------             ----------
Consumer                             $   1,439,988            $   1,191,018
Commercial and financial                 1,402,173                1,237,902
Real estate - commercial                 2,228,675                2,334,161
Real estate - residential               10,907,467               10,334,242
Student loans                              587,040                  589,653
                                       ------------             ------------
                                        16,565,343               15,686,976
Less: Deferred loan fees                   (78,909)                 (74,542)
     Allowance for possible loan losses   (175,869)                (193,389)
                                        -----------              -----------
Loans, net                            $ 16,310,565             $ 15,419,045
                                        ==========               ==========

     The Corporation,  in the ordinary course of business, has loan, deposit and
     other  routine  transactions  with its  executive  officers,  directors and
     entities  in which they have  principal  ownership.  Loans are made to such
     related parties at  substantially  the same credit terms as other borrowers
     and do not represent more than the usual risk of  collection.  Activity for
     these related party loans for the years ended December 31, 1997 and 1996 is
     as follows:


                                      F-13

<PAGE>


                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

4.   Loans (Cont'd.)

                                              1997                 1996
                                           --------------       ---------
     Balance, January 1                  $    81,891          $    53,875
     New loans                               123,000               41,212
     Payments                                (48,187)             (13,196)
                                             --------             --------
                                          $  156,704          $    81,891
                                            ========             ========

     Balance, December 31


     Included  within  the  loan  portfolio  are  loans  on  which  the Bank has
     discontinued the accrual of interest. Such loans totaled $268,186,  $98,104
     and $-0- at December 31,  1997,  1996 and 1995,  respectively.  If interest
     income had been recorded on all non-accrual loans outstanding  during 1997,
     1996 and 1995,  interest income would have been increased by  approximately
     $10,604, $500 and $-0-, respectively.

5.   Allowance for possible loan losses

     An analysis of the changes in the  allowance  for possible  loan losses for
     the years ended December 31, 1997, 1996 and 1995 is as follows:

                                       1997           1996            1995
                                       ----           ----            ----

Balance, January 1                  $ 193,389      $ 201,149       $ 202,687
Provision charged to operations          -0-            -0-             -0-
Recoveries on charged off loans         4,276          2,995           6,693
Loans charged off                     (21,796)       (10,755)         (8,231)
                                      -------        -------        --------

Balance, December 31                $ 175,869      $ 193,389       $ 201,149
                                      =======        =======         =======


                                      F-14

<PAGE>


                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995


6.   Concentrations of credit risk

          Substantially all of the Corporation's  business  activity,  including
          loans  and  loan   commitments,   is  with  customers  located  within
          Cumberland  County of Pennsylvania.  The portfolio is diversified with
          no single  industry  comprising  greater than ten percent of the total
          loans outstanding. A large portion of the portfolio is secured by real
          estate as reflected in the classification of loans in Note 4.

7. Financial instruments with off balance sheet risk

          The Corporation is a party to financial  instruments  with off balance
          sheet  risk in the normal  course of  business  to meet the  financing
          needs of its customers.  These financial instruments consist primarily
          of  commitments  to extend  credit -- typically  residential  mortgage
          loans and commercial loans -- and, to a lesser extent, standby letters
          of credit. Those instruments involve, to varying degrees,  elements of
          credit and interest  rate risk in excess of the amount  recognized  on
          the balance sheet.

          The   Corporation's   exposure   to  credit   loss  in  the  event  of
          nonperformance  by the other  party to the  financial  instrument  for
          commitments  to  extend  credit  and  standby  letters  of  credit  is
          represented  by the  contractual  amount  of  those  instruments.  The
          Corporation  uses the same credit  policies in making  commitments and
          conditional  obligations as it does for on balance sheet  instruments.
          The  Corporation  does not anticipate  any material  losses from those
          commitments.

          Commitments  to extend credit are  agreements to lend to a customer as
          long as there are no violations of any  condition  established  in the
          contract.  Commitments  generally have fixed expiration dates or other
          termination  clauses and may require  payment of a fee.  Since many of
          the  commitments  are expected to expire without being drawn upon, the
          total  commitment  amounts do not  necessarily  represent  future cash
          requirements.    The    Corporation    evaluates    each    customer's
          creditworthiness  on a  case-by-case  basis.  The amount of collateral
          obtained,  if deemed  necessary by the Corporation  upon extensions of
          credit,  is based on management's  credit  evaluation of the customer.
          Collateral held varies but may include accounts receivable, inventory,
          property,  plant  and  equipment,   and  income-producing   commercial
          properties. On loans secured by real estate, the Corporation generally
          requires loan to value ratios of no greater than 80%.


                                      F-15

<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

7. Financial instruments with off balance sheet risk (Cont'd.)

          Standby  letters of credit are conditional  commitments  issued by the
          Corporation  to  guarantee  the  performance  of a customer to a third
          party.  Those  guarantees  are primarily  issued to support public and
          private  borrowing  arrangements,  including  commercial  paper,  bond
          financing,  and  similar  transactions.  The terms of the  letters  of
          credit vary and may have renewal features. The credit risk involved in
          using  letters of credit is  essentially  the same as that involved in
          extending  loans  to  customers.   The  Corporation  holds  collateral
          supporting those commitments for which collateral is deemed necessary.

          A summary  of the  Corporation's  exposure  for loan  commitments  and
          standby letters of credit at December 31, 1997 and 1996 is as follows:

                                              1997                      1996
                                            ------------              --------

          Commitments to extend credit    $   150,500               $   231,741
          Standby letters of credit           153,037                   153,037
                                            ---------                 ---------

               Total                      $   303,537               $   384,778
                                              =======                   =======


8.   Premises and equipment

          Premises and equipment at December 31 consisted of the following:


                     Estimated Useful Life              1997            1996
                     ---------------------        ---------------    ----------

Land                                               $     47,000    $    47,000
Bank premises               15 to 50 years              397,946        347,720
Leasehold improvements       5 to 10 years               83,658         83,658
Furnishings and equipment    3 to 20 years              492,978        453,604
                                                     ----------      ---------
                                                      1,021,582        931,982
Accumulated depreciation                               (620,519)      (574,758)
                                                       --------       --------

   Total                                           $    401,063    $   357,224
                                                     ==========      =========


     Depreciation  charged to operating  expense in 1997,  1996 and 1995 totaled
     $45,762, $49,022 and $43,323, respectively.

                                      F-16

<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

9.   Time deposits

     Scheduled maturities of time deposits at December 31, 1997 are as follows:

           1998                                                 $  11,634,790
           1999                                                     3,165,430
           2000                                                       766,915
           2001                                                       213,030
           2002                                                        33,000
           2003 and thereafter                                            -0-
                                                             ----------------

               Total                                           $  15,813,165
                                                                  ==========

10.  Time certificates of deposit

          Time  certificates of deposit of $100,000 or more at December 31, 1997
          and 1996 amounted to $1,822,159 and $1,161,112, respectively.

          Interest  expense on time  certificates of deposit of $100,000 or more
          approximated  $75,633,  $68,377  and  $43,000 in 1997,  1996 and 1995,
          respectively.

11.  Common stock

          Net income per share,  dividends per share and weighted average shares
          outstanding  references  reflect  the effects of a  two-for-one  stock
          split declared November 26, 1996, effective as of January 2, 1997.

12.  Lease commitments

          In 1995,  the  Corporation  entered  into an agreement to lease office
          space for a branch bank operation.  Under terms of the agreement,  the
          Corporation  leases the space for a ten year period with one five year
          renewal  option.  Lease payments  total $4,800  annually for the first
          five years, with a $600 annual increase in each of the last five years
          of the  initial  term.  The  Corporation  is  responsible  for certain
          insurance  charges and real estate tax  increases.  Future minimum net
          lease rentals are as follows:

           1998                                                       $ 4,800
           1999                                                         4,800
           2000                                                         5,100
           2001                                                         5,700
           2002                                                         6,300
           2003 and thereafter                                         18,300

                                      F-17

<PAGE>


                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

13.  Federal income taxes

          Income tax expense  (benefit)  for the years ended  December 31, 1997,
          1996 and 1995 and the related effective income tax rates are comprised
          of the following items:

<TABLE>
                                             1997                  1996
                                     -------------------    ------------------
                                     Amount        Rate     Amount        Rate
                                     -----        ------    ------        ----
         <S>                       <C>            <C>     <C>            <C>
         Tax at statutory rates    $ 257,205      34.00%  $ 232,751      34.00%
         Tax exempt income           (48,105)     (6.36)    (31,905)     (4.67)
         Interest paid to carry
          tax exempt items             6,403        .85       4,420        .66
         Other items                     106        .01        (458)      (.07)
                                 -----------   ---------  ----------   --------

                 Total             $ 215,609      28.50%  $ 204,808      29.92%
                                     =======      =====     =======      =====
<CAPTION>
                                                          1995
                                                  --------------------
                                                   Amount         Rate
                                                  -------         ----
         <S>                                     <C>             <C>
         Tax at statutory rates                  $ 200,511       34.00%
         Tax exempt income                         (39,311)      (6.67)
         Interest paid to carry
          tax exempt items                          14,986        2.54
         Other items                                  (977)       (.16)
                                                  ---------    --------

                 Total                           $ 175,209       29.71%
                                                   =======      ======

</TABLE>


          Deferred  income tax results  from income and expense  items which are
          recognized  for financial  statement  purposes in different  reporting
          periods than for federal income tax purposes. The current and deferred
          portions of applicable income taxes (benefits) were as follows:


                                  1997               1996                1995
                              ------------        ------------         --------
     Current tax payable       $ 218,470           $ 205,835          $ 178,371
      Deferred tax (benefit)      (2,861)             (1,027)            (3,162)
                                 --------           ---------          ---------
     Applicable federal
     income tax                $ 215,609           $ 204,808          $ 175,209
                                 =======             =======            =======

                                      F-18
<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

13.  Federal income taxes (Cont'd.)

          The  Corporation  provides  deferred  taxes,  at the 34% statutory tax
          rate, on cumulative temporary differences.  Components of deferred tax
          assets and liabilities at December 31 are as follows:

                                                 1997                1996
                                              ------------        --------
         Deferred tax assets
            Allowance for loan loss           $   21,161         $   27,117
            Loans, including fees                  5,663              8,495
            Investment securities                    -0-                226
            Compensated absences                  21,222             19,421
            Deferred compensation                 28,181             21,982
                                                --------           --------
                                                  76,227             77,241
                                                --------           --------
         Deferred tax liabilities
            Accumulated depreciation              27,595             27,937
            Pension                                4,874              8,181
            Investment securities                  3,768                -0-
                                               ---------        -----------
                                                  36,237             36,118
                                                --------           --------

                Net deferred tax assets       $   39,990         $   41,123
                                                ========           ========

14.  Pension plans

     The Corporation  sponsored a  noncontributory  defined benefit pension plan
     covering   substantially  all  of  its  employees.   In  March,  1993,  the
     Corporation  froze the plan and the benefits at the then existing  amounts.
     Plan benefits are based on years of service and average  compensation.  The
     funding policy had been to contribute annually the amount necessary to fund
     the current normal cost and to amortize the past service  funding base over
     40 years,  while staying within the maximum  deductible  amount for federal
     income taxes.

     The  following  schedule  sets forth the plan's  funded  status and amounts
     recognized  in the Bank's  balance  sheets at December 31,  1997,  1996 and
     1995:

                                     1997                1996           1995
                                -------------        ------------     --------
Service cost-benefits earned
      during the year            $      -0-         $      -0-       $    -0-
Interest cost on projected benefit
      obligation                     27,247             29,727         29,225
Actual return on plan assets        (23,330)           (31,328)       (30,583)
Net amortization and deferral         5,811             10,466          2,247
                                   ---------           -------       ---------
Net periodic pension expense    $     9,728         $    8,865       $    889
                                  =========           ========      ==========

                                      F-19

<PAGE>


                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

14.  Pension plans (Cont'd.)

     Actuarial present value of accumulated plan benefits:


                                               1997                      1996
                                            --------------            ---------

 Projected benefit obligation (all vested)    649,900               $   544,931
 Plan assets at fair value, primarily
         annuity contracts                    510,610                   493,085
                                           -----------                ---------
 Projected benefit obligation in excess       139,290                    51,846
         of plan assets
   Unrecognized gain or (loss)                 24,767                   114,375
   Unrecognized net transition liability     (178,391)                 (190,283)
                                             --------                  --------

    Accrued (prepaid) pension expense     $     14,334              $   (24,062)
                                            ==========                =========


 Assumptions used:

 Weighted average discount rate                    5.00%       6.00%
 Weighted average rate of compensation increase     N/A         N/A
 Expected long-term rate of return on plan assets  6.00%       6.00%


     In March, 1993, the Corporation adopted a defined contribution pension plan
     (401-K) covering all employees with over one year of service and completing
     more than 1,000  hours of service  per year.  Employees  may elect to defer
     from 1% to 15% of  compensation  (subject  to IRS  limitations)  which vest
     immediately.  Employer contributions to the plan are discretionary,  and do
     not  vest  until  the  employee  has  completed   five  years  of  service.
     Contributions  to the plan  totaled  $38,328,  $35,411  and $34,259 for the
     years ended December 31, 1997, 1996 and 1995, respectively.

15.  Deferred compensation

     In  1993,  the  Corporation  entered  into  a  "Salary   Continuation  Plan
     Agreement" with an  employee/officer of the Bank in recognition of the many
     years of service the employee has provided to the Bank.  Under terms of the
     agreement,  the  Corporation  credits  $15,000  plus a 5% interest  accrual
     factor to the employee's account annually. Amounts in the account are fully
     vested and may be  withdrawn  upon the  employee's  separation  of service.
     Amounts charged to  compensation  during the years ended December 31, 1997,
     1996 and 1995 totaled $18,232, $17,365 and $17,288, respectively.


                                      F-20
<PAGE>


                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

16.  Regulatory matters and shareholders' equity

          The Corporation is subject to various regulatory capital  requirements
          administered  by its primary  federal  regulator,  the Federal Deposit
          Insurance  Corporation (FDIC).  Failure to meet the minimum regulatory
          capital  requirements  can initiate  certain  mandatory,  and possible
          additional  discretionary  actions by regulators,  that if undertaken,
          could  have a  direct  material  affect  on the  Corporation  and  the
          consolidated  financial  statements.   Under  the  regulatory  capital
          adequacy guidelines and the regulatory framework for prompt corrective
          action,  the Bank  must meet  specific  capital  guidelines  involving
          quantitative  measures of the Bank's assets,  liabilities  and certain
          off-balance-sheet  items as  calculated  under  regulatory  accounting
          practices.  The Bank's capital  amounts and  classification  under the
          prompt  corrective  action  guidelines are also subject to qualitative
          judgments by the  regulators  about  components,  risk  weightings and
          other factors.

          Quantitative  measures  established  by regulation  to ensure  capital
          adequacy  require the Bank to maintain  minimum amounts and ratios of:
          total risk-based capital and Tier I capital to riskweighted assets (as
          defined  in the  regulations),  and Tier I capital to  adjusted  total
          assets (as  defined).  Management  believes,  as of December 31, 1997,
          that the Bank meets all the capital adequacy  requirements to which it
          is subject.

          As of December 31, 1997, the most recent  notification  from the FDIC,
          the Bank was  categorized  as well  capitalized  under the  regulatory
          framework for prompt corrective  action. To remain categorized as well
          capitalized,  the Bank will have to maintain minimum total risk-based,
          Tier I risk-based and Tier I leverage ratios as disclosed in the table
          below.  There  are no  conditions  or  events  since  the most  recent
          notification  that management  believes have changed the Bank's prompt
          corrective action category.


                                      F-21


<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995

16. Regulatory matters and shareholders' equity (Cont'd.)

          The  Bank's  actual and  required  capital  amounts  and ratios are as
          follows (dollars in thousands):

<TABLE>
<CAPTION>

                                                             For Capital
                                     Actual               Adequacy Purposes
                              ----------------------    ---------------------
                               Amount          Ratio     Amount         Ratio
                              -------          -----     ------         -----

<S>                           <C>             <C>        <C>            <C>
As of December 31, 1997
 Total Risk-Based Capital
  (to Risk-Weighted Assets)    $5,633          35.5%     >$1,271         >8.0%
                                                         -               -
 Tier I Capital
  (to Risk-Weighted Assets)    $5,457          34.4%     > $ 635         >4.0%
                                                         -               -
 Tier I Capital
  (to Adjusted Total Assets)   $5,457          13.1%     >$1,656         >4.0%
                                                         -               -
As of December 31, 1996
 Total Risk-Based Capital
  (to Risk-Weighted Assets)    $5,219          36.0%     >$1,159         >8.0%
                                                         -               -
 Tier I Capital
  (to Risk-Weighted Assets)    $5,038          34.8%     >$  579         >4.0%
                                                         -               -
 Tier I Capital
  (to Adjusted Total Assets)   $5,038          12.3%     >$1,635         >4.0%
                                                         -               -

<CAPTION>
                                                   To Be Well Capital-
                                                     ized Under The
                                                   Prompt Corrective
                                                   Action Provisions
                                                  -------------------
                                                  Amount        Ratio
                                                  ------        -----
<S>                                             <C>          <C>
As of December 31, 1997
   Total Risk-Based Capital
       (to Risk-Weighted Assets)                 >$1,588       >10.0%
                                                 -             -
   Tier I Capital
       (to Risk-Weighted Assets)                 >$  953       > 6.0%
                                                 -             -
   Tier I Capital
       (to Adjusted Total Assets)                >$2,070       > 5.0%
                                                 -             -
As of December 31, 1996
   Total Risk-Based Capital
       (to Risk-Weighted Assets)                 >$1,449       >10.0%
                                                 -             -
   Tier I Capital
       (to Risk-Weighted Assets)                 >$  869       > 6.0%
                                                 -             -
   Tier I Capital
       (to Adjusted Total Assets)                >$2,044       > 5.0%
                                                 -             -
</TABLE>


          Certain  restrictions  exist  regarding  the  ability  of the  Bank to
          transfer funds to the Corporation in the form of cash dividends, loans
          or  advances.  The  approval  of the  Comptroller  of the  Currency is
          required  to pay  dividends  in excess  of  earnings  retained  in the
          current year plus retained net profits for the preceding two years. As
          of December  31, 1997,  $1,092,411  of  undistributed  earnings of the
          Bank,  included in consolidated  retained earnings,  was available for
          distribution to the Corporation as dividends  without prior regulatory
          approval.

          Under national banking laws, the Bank is also limited as to the amount
          it may loan to the Corporation,  unless such loans are  collateralized
          by specific obligations.

17.  Additional cash flow information

          Cash paid during the years ended  December 31 for  interest and income
          taxes is as follows:

                                      1997             1996             1995
                                  ------------     ------------       --------

         Interest                 $1,162,167       $1,120,315        $1,003,639

         Federal income taxes    $   233,435      $   178,400       $   265,540


                                      F-22

<PAGE>


                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995


18. Parent company only financial statements


Balance sheet - December 31                   1997                     1996
- ---------------------------               -----------------        -----------
Assets
     Cash                             $            389          $       51,495
     Investment in subsidiary                5,463,820               5,038,084
                                             ---------               ---------
           Total Assets               $      5,464,209          $    5,089,579
                                             =========               =========

Liabilities
     None                             $           -0-           $          -0-
                                         --------------          --------------

Shareholder's equity
     Common Stock                              125,000                 125,000
     Surplus                                   710,000                 710,000
     Retained earnings                       4,671,895               4,255,017
     Net unrealized gains (losses) on
          securities available for sale          7,314                   (438)
                                          ------------           ------------
                                             5,514,209               5,089,579

     Less: Treasury stock, 2,000
      shares, at cost                          (50,000)                   -0-
                                            ----------           --------------
                                             5,464,209               5,089,579
                                             ---------               ---------
    Total shareholders' equity
    Total liabilities and shareholders'
          equity                          $  5,464,209            $  5,089,579
                                             =========               =========

                                      F-23
<PAGE>


                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995


18. Parent company only financial statements (Cont'd.)

Statement of income -
year ended December 31            1997                1996                 1995
- ----------------------        ------------        ------------         --------
Income
 Dividends from subsidiary $   131,500         $   170,500          $   113,750
                               -------             -------              -------
Expenses
 Amortization                      -0-               9,302                9,302
 Others, primarily
   professional fees             8,606               7,165                6,840
                             ---------           ---------            ---------

     Total expenses              8,606              16,467               16,142
                             ---------            --------             --------
 Income before income taxes and
 equity in undistributed net
 income of subsidiary          122,894             154,033               97,608

Applicable income taxes            -0-                -0-                   -0-
                              --------            --------            ---------
                               122,894             154,033               97,608
Undistributed net income of
 subsidiary                    417,984             325,721              316,921
                               -------             -------              -------
             Net income    $   540,878         $   479,754          $   414,529
                               =======             =======              =======

Statement of cash flows -
year ended December 31          1997                 1996                1995
- ----------------------         -----                -----               ----
Operating activities
  Net income              $   540,878           $  479,754          $  414,529
  Adjustments to
   reconcile net income to
   net cash provided by
   operating activities
     Amortization                 -0-                9,302               9,302
     Undistributed net
      income of subsidiary  (417,984)            (325,721)           (316,921)
                             --------             --------            --------

  Cash provided by
   operating activities      122,894              163,335             106,910
                           ---------              -------             -------
Financing activities
  Purchase of Treasury
   Stock                     (50,000)                  -0-                 -0-
   Dividends paid           (124,000)            (112,500)           (106,250)
                            --------             --------            --------

Net cash used in financing
  activities                (174,000)            (112,500)           (106,250)
                            --------             --------            --------
Net increase (decrease)
  in cash and                (51,106)              50,835                 660
  cash equivalents

Cash and cash equivalents,
  beginning                   51,495                  660                 -0-
                            --------         ------------         -----------
Cash and cash equivalents,
  ending                $        389         $     51,495        $        660
                          ==========           ==========          ==========

                                      F-24

<PAGE>

                         FARMERS NATIONAL BANCORP, INC.
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)
                        DECEMBER 31, 1997, 1996 AND 1995


19.  Contingencies

          The Corporation is subject to numerous claims and lawsuits which arise
          primarily  in the normal  course of  business.  At December  31, 1997,
          there were no such claims which,  in the opinion of management,  would
          have a  material  adverse  effect  on the  financial  position  of the
          Corporation.

20.  Subsequent event

          On July 28,  1998,  the Board of Directors  executed an Agreement  and
          Plan of Reorganization  (the "Agreement")  among the Corporation,  the
          Bank  and  ACNB  Corporation  ("ACNB")  headquartered  in  Gettysburg,
          Pennsylvania.  The  Agreement  provides that the  affiliation  will be
          effected by means of a merger of the  Corporation  and a subsidiary of
          ACNB. In the merger,  each shareholder of the Corporation will receive
          2.266  shares of ACNB common  stock in exchange  for each share of the
          Corporation's  stock,   subject  to  certain  terms,   conditions  and
          limitations set forth in the Agreement.

          Completion of the merger is subject to approval by various  regulatory
          agencies and the shareholders of the Corporation.


                                      F-25

<PAGE>

                                      ANNEX A

                      AGREEMENT AND PLAN OF REORGANIZATION
                 DATED AS OF THE TWENTY-EIGHTH DAY OF JULY, 1998
                                  BY AND AMONG
                                ACNB CORPORATION,
                                ACNB NORTH, INC.
                         FARMERS NATIONAL BANCORP, INC.
                                       AND
                        FARMERS NATIONAL BANK OF NEWVILLE

<PAGE>

                      AGREEMENT AND PLAN OF REORGANIZATION
                 DATED AS OF THE TWENTY-EIGHTH DAY OF JULY, 1998
                                  BY AND AMONG
                                ACNB CORPORATION,
                                ACNB NORTH, INC.
                         FARMERS NATIONAL BANCORP, INC.
                                       AND
                        FARMERS NATIONAL BANK OF NEWVILLE


                                TABLE OF CONTENTS

                                                                       Page(s)


ARTICLE I
THE PLAN OF MERGER
  SECTION 1.1   The Merger, Closing: Effective Time .......................2

ARTICLE II
CONVERSION OF SHARES AND
EXCHANGE OF STOCK CERTIFICATES
  SECTION 2.1  Conversion of Shares........................................3
  SECTION 2.2  Exchange of Stock Certificates..............................4
  SECTION 2.3  Other Matters...............................................7

ARTICLE III
REPRESENTATIONS AND WARRANTIES
  SECTION 3.1  Representations and Warranties of Farmers Bancorp
                and Farmers National......................................8
  SECTION 3.2  Representations and Warranties of ACNB....................25
  SECTION 3.3  Representations and Warranties of ACNB North..............28

ARTICLE IV
COVENANTS OF FARMERS BANCORP AND FARMERS NATIONAL
  SECTION 4.1  Conduct of Business.......................................29
  SECTION 4.2  Best Efforts..............................................32
  SECTION 4.3  Access to Properties and Records..........................33
  SECTION 4.4  Subsequent Financial Statements...........................33
  SECTION 4.5  Board and Committee Minutes...............................34
  SECTION 4.6  Update Schedule...........................................34
  SECTION 4.7  Notice....................................................34
  SECTION 4.8  Other Proposals...........................................34
  SECTION 4.9  Dividends.................................................34
  SECTION 4.10 Core Deposits.............................................35
  SECTION 4.11 Affiliate Letters.........................................35
  SECTION 4.12 No Purchases or Sales of ACNB Common Stock
                During Price Determination Period........................35
  SECTION 4.13 Accounting Treatment......................................35
  SECTION 4.14 Press Releases............................................35
  SECTION 4.15 Phase I Environmental Audit...............................36

<PAGE>

ARTICLE V
COVENANTS OF ACNB AND ACNB NORTH
  SECTION 5.1  Best Efforts..............................................36
  SECTION 5.2  Access to Properties and Records..........................37
  SECTION 5.3  Subsequent Financial Statements...........................37
  SECTION 5.4  Update Schedule...........................................37
  SECTION 5.5  Notice....................................................37
  SECTION 5.6  No Purchase or Sales of ACNB Common Stock
                During Price Determination Period........................37
  SECTION 5.7  Publicity.................................................38
  SECTION 5.8  Indemnification...........................................38

ARTICLE VI
CONDITIONS TO CONSUMMATION
  SECTION 6.1  Common Conditions.........................................38
  SECTION 6.2  Conditions to Obligations of ACNB and ACNB North..........40
  SECTION 6.3  Conditions to the Obligations of Farmers Bancorp
                and Farmers National ....................................42
ARTICLE VII
TERMINATION
  SECTION 7.1  Termination...............................................43
  SECTION 7.2  Effect of Termination.....................................44
  SECTION 7.3  Expenses..................................................45

ARTICLE VIII
POST MERGER AGREEMENTS
  SECTION 8.1  Employees.................................................45
  SECTION 8.2  Officers..................................................45
  SECTION 8.3  Directors.................................................46
  SECTION 8.4  Farmers National Board of Directors.......................46
  SECTION 8.5  Certain Matters...........................................46
  SECTION 8.6  NASDAQ Listing............................................46

ARTICLE IX
OTHER MATTERS
  SECTION 9.1  Certain Definitions; interpretation.......................47
  SECTION 9.2  Survival..................................................48
  SECTION 9.3  Parties in Interest.......................................48
  SECTION 9.4  Captions..................................................48
  SECTION 9.5  Severability..............................................48
  SECTION 9.6  Access; Confidentiality...................................48
  SECTION 9.7  Waiver and Amendment......................................49
  SECTION 9.8  Counterparts..............................................49
  SECTION 9.9  Governing Law.............................................49
  SECTION 9.10 Expenses..................................................49
  SECTION 9.11 Notices...................................................49
  SECTION 9.12 Entire Agreement: Etc.....................................50

<PAGE>


     AGREEMENT AND PLAN OF  REORGANIZATION  dated as of the twenty-eighth day of
July, 1998 (this "Plan" or this "Agreement"),  is entered into by and among ACNB
Corporation,   a  Pennsylvania   corporation  ("ACNB"),   ACNB  North,  Inc.,  a
Pennsylvania  corporation,  ("ACNB North"),  Farmers National  Bancorp,  Inc., a
Pennsylvania  corporation  ("Farmers  Bancorp"),  and Farmers  National  Bank of
Newville, a national banking association ("Farmers National").

                                    RECITALS:

     WHEREAS, ACNB is a Pennsylvania bank holding company; and

     WHEREAS, ACNB North is a wholly-owned  subsidiary of ACNB created solely to
facilitate the transactions described in this Agreement; and

     WHEREAS, Farmers Bancorp is a Pennsylvania bank holding company; and

     WHEREAS,  Farmers National is the wholly-owned  national bank subsidiary of
Farmers Bancorp; and

     WHEREAS,  the boards of directors of ACNB, ACNB North,  Farmers Bancorp and
Farmers  National have each determined that it is in the best interests of their
respective  shareholders  for ACNB  North  to  statutorily  merge  with and into
Farmers Bancorp (the "Merger") as a result of which Farmers National will become
a  wholly-owned,  second tier subsidiary of ACNB, all upon the terms and subject
to the conditions set forth herein; and

     WHEREAS,  the parties desire to make certain  representations,  warranties,
covenants and agreements in connection  with this Agreement and to set forth the
conditions to the Merger; and

     WHEREAS,  Farmers  Bancorp  and ACNB  North  desire to merge in the  manner
provided for herein and to adopt this Agreement as a plan of reorganization  and
to consummate  such plan in accordance with the provisions of Section 368 of the
Internal Revenue Code of 1986, as amended (the "Code").

     NOW,  THEREFORE,  in consideration of their mutual promises and obligations
hereunder,  the parties hereto,  intending to be legally bound hereby, adopt and
make this Agreement and prescribe the terms and conditions hereof and the manner
and basis of carrying it into effect, which shall be as follows:

                                        1

<PAGE>

                                    ARTICLE I
                               THE PLAN OF MERGER

SECTION 1.1 The Merger; Closing; Effective Time.

(a)  Subject to the terms and  conditions  of this  Agreement  and in accordance
     with  the  applicable  laws of the  Commonwealth  of  Pennsylvania,  at the
     Effective Time (as defined in Section  1.1(c)),  ACNB North shall be merged
     with and into Farmers Bancorp and the separate corporate  existence of ACNB
     North  shall  thereupon  cease.  Farmers  Bancorp  shall  be the  surviving
     corporation  in  the  Merger  (sometimes  hereinafter  referred  to as  the
     "Surviving  Corporation")  and shall continue to be governed by the laws of
     the  Commonwealth  of  Pennsylvania  and shall be a registered bank holding
     company  under the Bank Holding  Company Act of 1956,  as amended,  and the
     separate  corporate  existence  of  Farmers  Bancorp  with all its  rights,
     privileges,  immunities, powers and franchises shall continue unaffected by
     the Merger.  The name of the  Surviving  Corporation  shall be "ACNB North,
     Inc.".  The Merger  shall have the effects  specified  in the  Pennsylvania
     Business Corporation Law of 1988, as amended (the "PBCL"').

(b)  The  closing of the Merger (the  "Closing")  shall take place at such place
     and time and on such date,  following  three (3)  business  days' notice to
     Farmers Bancorp,  as shall be agreed upon by all parties,  which date shall
     not be later  than the 30th  business  day after (i) the last  approval  of
     required  governmental  authorities  is  granted  and any  related  waiting
     periods expire, (ii) the lifting, discharge or dismissal of any stay of any
     such  governmental  approval  or of any  injunction  against the Merger and
     (iii) all  shareholder  approvals  required  by the parties  hereunder  are
     received.

(c)  Immediately following the Closing, and provided that this Agreement has not
     been terminated or abandoned pursuant to Article VII hereof, ACNB North and
     Farmers Bancorp will cause articles of merger (the "Articles of Merger") to
     be  delivered  and  properly  filed  with  the  Department  of State of the
     Commonwealth of Pennsylvania (the "Department of State").  The Merger shall
     become  effective at 11:59 p.m. on the day on which the Closing  occurs and
     Articles  of Merger  are filed with the  Department  of State or such later
     date as may be specified in the Articles of Merger (the "Effective  Time").
     The "Effective  Date" when used herein means the day on which the Effective
     Time for the Merger occurs.

(d)  At the Effective  Time,  the articles of  incorporation  and bylaws of ACNB
     North in  effect  immediately  prior  to the  Effective  Time  shall be the
     articles of incorporation and bylaws of the Surviving  Corporation.  At the
     Effective Time, the directors and officers of ACNB North  immediately prior
     to the Effective Time shall be and become the directors and officers of the
     Surviving Corporation with such additions or deletions as ACNB, in its sole
     discretion, may determine.


                                        2

<PAGE>

                                   ARTICLE II
                            CONVERSION OF SHARES AND
                         EXCHANGE OF STOCK CERTIFICATES

SECTION 2.1 Conversion of Shares.

     On the Effective Date (as defined in Section 1.1(c) of this  Agreement) the
shares of Farmers Bancorp Common Stock (defined below) then outstanding shall be
converted into shares of ACNB Common Stock (defined below), as follows:

(a)  General.
     --------

     Subject to the provisions of this Article II, each share of Farmers Bancorp
     Common Stock,  par value $0.50 per share  ("Farmers  Bancorp Common Stock")
     issued and outstanding  immediately before the Effective Date shall, on the
     Effective  Date,  be converted  into and become,  without any action on the
     part of the  holder  thereof,  the right to  receive  2.266  shares of ACNB
     Common  Stock,  par  value,  $2.50 per share  ("ACNB  Common  Stock")  (the
     "Exchange  Ratio").  Subject  to the  provisions  of  Section  2.1(b),  the
     aggregate  number of shares of ACNB  Common  Stock to be issued  under this
     Agreement  shall not exceed  561,968 shares and the Exchange Ratio shall be
     2.266.

(b)  Anti-dilution Provision.
     ------------------------

     In the event that ACNB shall at any time  before the  Effective  Date:  (i)
     declare or pay a dividend in shares of ACNB Common Stock,  (ii) combine the
     outstanding shares of ACNB Common Stock into a smaller number of shares, or
     (iii) subdivide the outstanding  shares of ACNB Common Stock into a greater
     number of shares,  or (iv)  reclassify  the shares of ACNB stock,  then the
     Exchange Ratio shall be proportionately adjusted accordingly.

(c)  No Fractional Shares.
     ----------------------

     No  fractional  shares of ACNB Common Stock,  and no scrip or  certificates
     therefor,  shall be issued in  connection  with the Merger.  In lieu of the
     issuance of any fractional  share to which he would  otherwise be entitled,
     each former  shareholder of Farmers Bancorp shall receive in cash an amount
     equal to the fair  market  value of his  fractional  interest,  which  fair
     market  value  shall be  determined  by  multiplying  such  fraction by the
     Closing Market Price (as defined in Section 2.1(d) of this Article II).

(d)  Closing Market Price.
     ---------------------

     For  purposes  of this  Agreement,  the Closing  Market  Price shall be the
     arithmetic  average of the per share  closing  prices for ACNB Common Stock
     for the twenty (20) trading days  immediately  preceding  the date which is
     five (5) business days before the Effective Date, as reported by two market
     makers  in ACNB  Common  Stock  listed  in  ACNB's  1998  Annual  Report to
     Shareholders; or, in the event that neither of these firms is then making a
     market in ACNB Common Stock by two brokerage  firms then making a market in
     ACNB Common Stock to be selected by ACNB and  approved by Farmers  Bancorp.
     The foregoing twenty (20) trading days are hereinafter  sometimes  referred
     to as the "Price Determination

                                        3

<PAGE>

     Period".  (For example,  if November 2, 1998 were to be the Effective Date,
     then the Price Determination  Period would be September 28, 29, 30, October
     1, 2, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 19, 20, 21, 22, 23, 1998.)

(e)  Farmers Bancorp Treasury Stock.
     -------------------------------

     Each share of Farmers  Bancorp Common Stock issued and held in the treasury
     of Farmers Bancorp as of the Effective Date, if any, shall be canceled, and
     no cash, stock, or other property shall be delivered in exchange therefor.

(f) ACNB Common Stock.
     ------------------

     (i)  Each share of ACNB Common  Stock  issued and  outstanding  immediately
          prior to the Effective  Date,  shall, on and after the Effective Date,
          continue to be issued and  outstanding  as an identical  share of ACNB
          Common Stock.

     (ii) Each share of ACNB  Common  Stock  issued and held in the  treasury of
          ACNB  as of the  Effective  Date,  if any,  shall,  on and  after  the
          Effective  Date,  continue  to be issued and held in the  treasury  of
          ACNB.

(g)  ACNB North Common Stock.
     ------------------------

     Each share of ACNB North Common Stock  issued and  outstanding  immediately
     prior to the  Effective  Date,  shall,  on and  after the  Effective  Date,
     continue to be issued and  outstanding as an identical  share of ACNB North
     Common Stock by virtue of and after the Merger, shall be converted into and
     thereafter  constitute  the issued and  outstanding  shares of the  capital
     stock of the Surviving Corporation.

SECTION 2.2 Exchange of Stock Certificates.

     Farmers  Bancorp  Common Stock  certificates  shall be  exchanged  for ACNB
Common Stock certificates in accordance with the following procedures:

(a)  Exchange Agent.
     ---------------

     The  transfer  agent of ACNB shall act as  exchange  agent  (the  "Exchange
     Agent") to receive  Farmers  Bancorp  Common  Stock  certificates  from the
     holders  thereof and to exchange  such stock  certificates  for ACNB Common
     Stock certificates and (if applicable) to pay cash for fractional shares of
     Farmers Bancorp Common Stock pursuant to Section 2.1(c) above. The Exchange
     Agent shall,  on or promptly after the Effective  Date, mail to each former
     shareholder  of Farmers  Bancorp a notice  specifying  the procedures to be
     followed in surrendering  such  shareholder's  Farmers Bancorp Common Stock
     certificates.

(b) Surrender of Certificates.
     ---------------------------

     As promptly as possible after receipt of the Exchange Agent's notice,  each
     former  shareholder of Farmers  Bancorp shall surrender his Farmers Bancorp
     Common Stock  certificates  to the Exchange  Agent;  provided,  that if any
     former  shareholder  of Farmers  Bancorp  shall be unable to surrender  his
     Farmers  Bancorp  Common  Stock  certificates  due to  loss  or  mutilation
     thereof, he

                                        4

<PAGE>

     may make a  constructive  surrender by following  procedures  comparable to
     those customarily used by ACNB for issuing replacement certificates to ACNB
     shareholders  whose  ACNB  Common  Stock  certificates  have  been  lost or
     mutilated.  Upon  receiving a proper  actual or  constructive  surrender of
     Farmers  Bancorp Common Stock  certificates  from a former Farmers  Bancorp
     shareholder,  the  Exchange  Agent  shall  issue  to such  shareholder,  in
     exchange therefor, an ACNB Common Stock certificate  representing the whole
     number of shares of ACNB Common Stock into which such shareholder's  shares
     of Farmers Bancorp Common Stock have been converted in accordance with this
     Article II,  together  with a check in the amount of any cash to which such
     shareholder is entitled,  pursuant to Section 2.1(c) of this Agreement,  in
     lieu of the issuance of a fractional share.

(c)  Dividend  Withholding.
     ----------------------

     Dividends,  if any,  payable by ACNB after the Effective Date to any former
     shareholder  of  Farmers  Bancorp  who has not  prior to the  payment  date
     surrendered  his Farmers  Bancorp  Common  Stock  certificates  may, at the
     option of ACNB,  be  withheld.  Any  dividends  so withheld  shall be paid,
     without interest, to such former shareholder of Farmers Bancorp upon proper
     surrender of his Farmers Bancorp Common Stock certificates.

(d)  Failure to Surrender Certificates.
     -----------------------------------

     All Farmers  Bancorp Common Stock  certificates  must be surrendered to the
     Exchange Agent within two (2) years after the Effective  Date. In the event
     that any former  shareholder  of Farmers  Bancorp  shall not have  properly
     surrendered  his Farmers Bancorp Common Stock  certificates  within two (2)
     years after the Effective  Date, the shares of ACNB Common Stock that would
     otherwise  have been issued to him may, at the option of ACNB,  be sold and
     the net proceeds of such sale,  together with the cash (if any) to which he
     is  entitled  in  lieu  of the  issuance  of a  fractional  share  and  any
     previously  accrued  dividends,  shall  be held in a  non-interest  bearing
     account for his  benefit.  From and after any such sale,  the sole right of
     such former  shareholder  of Farmers  Bancorp shall be the right to collect
     such  net  proceeds,  cash  and  accumulated  dividends.   Subject  to  all
     applicable  laws of  escheat,  such  net  proceeds,  cash  and  accumulated
     dividends  shall be paid to such  former  shareholder  of Farmers  Bancorp,
     without interest, upon proper surrender of his Farmers Bancorp Common Stock
     certificates.

(e)  Expenses of Share Surrender and Exchange.
     -----------------------------------------

     All costs and expenses associated with the foregoing surrender and exchange
     procedure shall be borne by ACNB.  Notwithstanding the foregoing,  no party
     hereto will be liable to any holder of Farmers Bancorp Common Stock for any
     amount paid in good faith to a public  official  or agency  pursuant to any
     applicable abandoned property, escheat or similar law.

(f)  Exchange  Procedures.
     ---------------------

     Each  certificate  for shares of Farmers Bancorp Common Stock delivered for
     exchange  under this Article II must be endorsed in blank by the registered
     holder  thereof or be  accompanied  by a power of attorney to transfer such
     shares  endorsed in blank by such holder.  If more than one  certificate is
     surrendered

                                        5

<PAGE>

     at one  time  and in one  transmittal  package  for  the  same  shareholder
     account,  the  number  of whole  shares  of ACNB  Common  Stock  for  which
     certificates will be issued pursuant to this Article II will be computed on
     the basis of the aggregate number of shares represented by the certificates
     so  surrendered.  If shares of Farmers  Bancorp Common Stock or payments of
     cash are to be issued or made to a person  other than the one in whose name
     the surrendered  certificate is registered,  the certificate so surrendered
     must be  properly  endorsed  in blank,  with  signature(s)  guaranteed,  or
     otherwise in proper form for transfer,  and the person to whom certificates
     for  shares of ACNB  Common  Stock is to be issued or to whom cash is to be
     paid  shall pay any  transfer  or other  taxes  required  by reason of such
     issuance  or payment to a person  other than the  registered  holder of the
     certificate   for  shares  of  Farmers   Bancorp  Common  Stock  which  are
     surrendered.  As promptly as  practicable  after the Effective  Date,  ACNB
     shall send, or cause to be sent, to each  shareholder  of record of Farmers
     Bancorp  Common  Stock,   transmittal   materials  for  use  in  exchanging
     certificates  representing  Farmers  Bancorp Common Stock for  certificates
     representing ACNB Common Stock into which the former have been converted in
     the Reorganization and Merger.

(g)  Closing of Stock  Transfer  Books;  Cancellation  of  Farmers  Bancorp
      Certificates.
     ---------------------------------------------------------------------

     Upon the  Effective  Date,  the stock  transfer  books for Farmers  Bancorp
     Common  Stock will be closed and no further  transfers of shares of Farmers
     Bancorp  Common  Stock  will   thereafter  be  made  or   recognized.   All
     certificates  for  shares  of  Farmers  Bancorp  Common  Stock  surrendered
     pursuant to this Article II will be canceled by ACNB.

(h)  Rights  Evidenced by Certificate.
     --------------------------------

     Each  certificate  for shares of ACNB Common  Stock  issued in exchange for
     certificates  of Farmers  Bancorp  Common Stock  pursuant to Section 2.2(f)
     hereof will be dated as of the Effective  Date and be entitled to dividends
     and all other  rights  and  privileges  pertaining  to such  shares of ACNB
     Common Stock from the Effective Date. Until  surrendered,  each certificate
     theretofore  evidencing  shares of Farmers  Bancorp Common Stock will, from
     and  after  the  Effective  Date,  evidence  solely  the  right to  receive
     certificates  for shares of ACNB Common  Stock  pursuant to Section  2.2(f)
     hereof.  If  certificates  for shares of Farmers  Bancorp  Common Stock are
     exchanged  for ACNB  Common  Stock at a date  following  one or more record
     dates for the  payment of  dividends  or of any other  distribution  on the
     shares of ACNB Common Stock subsequent to the Effective Date, ACNB will pay
     cash in an  amount  equal to  dividends  theretofore  payable  on such ACNB
     Common Stock and pay or deliver any other  distribution to which holders of
     shares of ACNB Common Stock have theretofore  become entitled.  No interest
     will accrue or be payable in respect of dividends or cash otherwise payable
     under this Section 2.2 upon  surrender of  certificates  for shares of ACNB
     Common Stock. Notwithstanding the foregoing, no party hereto will be liable
     to any holder of Farmers  Bancorp  Common Stock for any amount paid in good
     faith to a public official or agency  pursuant to any applicable  abandoned
     property,  escheat or similar  law.  Until  such time as  certificates  for
     shares of Farmers Bancorp Common Stock

                                        6

<PAGE>

     are surrendered by a Farmers Bancorp shareholder to ACNB for exchange, ACNB
     shall  have the right to  withhold  dividends  or any other  distributions,
     without  interest,  on the shares of the ACNB Common Stock issuable to such
     shareholder.

(i)  Payment  Procedures.
     -------------------

     As soon as practical  after the Effective  Date, ACNB shall make payment of
     the cash  consideration  provided  for in  Section  2.1(c)  to each  person
     entitled thereto.

(j)  Unclaimed Shares.
     -----------------

     In the event that any  certificates  for shares of Farmers  Bancorp  Common
     Stock  have not been  surrendered  for  exchange  in  accordance  with this
     Section on or before the second anniversary of the Effective Time, ACNB may
     at any time thereafter,  with or without notice to the holders of record of
     such certificates,  sell for the accounts of any or all of such holders any
     or all of the shares of ACNB Common  Stock which such  holders are entitled
     to receive under Section 2.1(a) hereof (the "Unclaimed  Shares").  Any such
     sale may be made by public or private sale or sale at any broker's board or
     on any  securities  exchange in such manner and at such times as ACNB shall
     determine.  If, in the  opinion of counsel  for ACNB,  it is  necessary  or
     desirable,  any  Unclaimed  Shares  may be  registered  for sale  under the
     Securities  Act of 1933, as amended (the  "Securities  Act") and applicable
     state  laws.  ACNB  shall not be  obligated  to make any sale of  Unclaimed
     Shares  if it shall  determine  not do so,  even if  notice  of sale of the
     Unclaimed  Shares  has been  given.  The net  proceeds  of any such sale of
     Unclaimed   Shares   shall  be  held  for  holders  of  the   unsurrendered
     certificates  for shares of Farmers  Bancorp  Common Stock whose  Unclaimed
     Shares  have  been  sold,  to  be  paid  to  them  upon  surrender  of  the
     certificates for shares of Farmers Bancorp Common Stock. From and after any
     such sale, the sole right of the holders of the unsurrendered  certificates
     for shares of Farmers Bancorp Common Stock whose Unclaimed Shares have been
     sold shall be the right to collect the net sale  proceeds  held by ACNB for
     their  respective  accounts,  and such  holders  shall not be  entitled  to
     receive any interest on such net sale proceeds held by ACNB.

SECTION 2.3 Other Matters.

(a)  Notwithstanding  any term of this  Agreement to the contrary,  ACNB may, in
     its discretion at any time prior to the Effective Time,  designate a direct
     or indirect  wholly-owned  subsidiary to  substitute  for ACNB North as the
     constituent  corporation in the Merger by written notice to Farmers Bancorp
     so long as the  exercise  of this right does not cause a material  delay in
     consummation of the transactions  contemplated herein. ACNB shall also have
     the right to cause ACNB  North,  or such  substitute,  to be the  Surviving
     Corporation  of the  Merger  described  at Section  1.1(a),  so long as the
     exercise  of such  right  does not have a  material  adverse  effect on the
     interests of the Farmers Bancorp shareholders or cause a material delay in,
     or  otherwise   adversely   affect,   consummation   of  the   transactions
     contemplated  herein;  if such right is exercised,  this Agreement shall be
     deemed to be modified to accord such change.

                                        7

<PAGE>




(b)  Nothing  set  forth  in this  Agreement  or any  Exhibit  hereto  shall  be
     construed:

     (i)  to preclude ACNB or ACNB North from acquiring or assuming, or to limit
          in any way the right of ACNB or ACNB North to acquire or assume, prior
          to or following the Effective  Date, the stock,  assets or liabilities
          of any other financial  services  institution or other  corporation or
          entity,  whether by issuance or  exchange  of ACNB  Common  Stock,  or
          otherwise;

     (ii) to preclude  ACNB or ACNB North from  issuing,  or to limit in any way
          the  right of  either  of them to  issue,  prior to or  following  the
          Effective  Date,  ACNB Common  Stock,  ACNB  Preferred  Stock or other
          securities;

     (iii)to preclude  ACNB from  granting  options at any time with  respect to
          ACNB Common Stock, ACNB Preferred Stock or other securities;

     (iv) to preclude option holders of ACNB from exercising options at any time
          with  respect to ACNB  Common  Stock,  ACNB  Preferred  Stock or other
          securities; or

     (v)  to preclude ACNB or ACNB North from taking, or to limit in any way the
          right of either of them to take,  any other action not  expressly  and
          specifically prohibited by the terms of this Agreement.


                                   ARTICLE III
                         REPRESENTATIONS AND WARRANTIES

     SECTION 3.1  Representations  and Warranties of Farmers Bancorp and Farmers
National.

     Farmers Bancorp and Farmers National represent and warrant to ACNB and ACNB
North (and the word "it" in this Article III refers to Farmers Bancorp,  Farmers
National  and each  subsidiary  of either)  that,  as of even date  herewith and
except as specifically  disclosed in the Annex of disclosure  schedules included
herewith, as follows:

(a)  Corporate Organization and Qualification.
     -----------------------------------------

     Farmers Bancorp is a corporation duly incorporated, validly existing and in
     good standing under the laws of the  Commonwealth of Pennsylvania and is in
     good  standing  as a foreign  corporation  in each  jurisdiction  where the
     properties owned, leased or operated, or the business conducted, by Farmers
     Bancorp requires such qualification,  except for such failure to qualify or
     be in such good  standing  which,  when taken  together with all other such
     failures,  would not have a Material  Adverse Effect on Farmers Bancorp and
     its  subsidiaries,  taken as a whole.  Farmers Bancorp is a registered bank
     holding  company  under the Bank Holding  Company Act of 1956,  as amended.
     Farmers  Bancorp  owns,  directly  or  indirectly  all  of the  issued  and
     outstanding  shares of capital stock of Farmers National.  Farmers National
     is a national banking association

                                        8

<PAGE>
     duly organized, validly existing and in good standing under the laws of the
     United States of America.  Farmers  Bancorp and Farmers  National each have
     the  requisite  corporate  and other  power and  authority  (including  all
     federal, state, local and foreign governmental  authorizations) to carry on
     their  respective  businesses  as  now  being  conducted  and  to  own  its
     properties  and  assets.  Farmers  Bancorp  has  made  available  to ACNB a
     complete and correct copy of the  articles of  incorporation  and bylaws of
     Farmers  Bancorp,  and Farmers National has made available to ACNB and ACNB
     North a complete  and  correct  copy of the  charter  and bylaws of Farmers
     National and such charter or articles,  as applicable,  and such bylaws are
     in full force and effect as of the date hereof.

(b)  Authorized Capital.
     -------------------

     The  authorized  capital stock of Farmers  Bancorp  consists of one million
     (1,000,000) shares of Farmers Bancorp Common Stock, of which 248,000 shares
     were  issued and  outstanding  as of the date of this  Agreement  and 2,000
     shares  were  issued  and held as  treasury  shares  as of the date of this
     Agreement.  The stock of Farmers National consists of five hundred thousand
     (500,000)  shares of common stock,  $1.00 par value per share, of which one
     hundred and  twenty-five  thousand  (125,000)  shares of common  stock were
     issued and outstanding as of the date of this  Agreement;  all of these are
     held by Farmers Bancorp.  All of the outstanding shares of capital stock of
     Farmers  Bancorp and Farmers  National  have been duly  authorized  and are
     validly issued,  fully paid and nonassessable.  Neither Farmers Bancorp nor
     Farmers  National has any shares of capital  stock  reserved for  issuance.
     Neither  Farmers Bancorp nor Farmers  National has any  outstanding  bonds,
     debentures,  notes or other obligations the holders of which have the right
     to vote (or convertible into or exercisable for securities having the right
     to vote) with shareholders on any matter.  The shares of Farmers National's
     common  stock  owned by  Farmers  Bancorp  are owned  free and clear of all
     liens,  pledges,  security  interests,  claims or other  encumbrances.  The
     outstanding shares of capital stock of Farmers Bancorp and Farmers National
     have not been issued in violation of any preemptive  rights.  Except as set
     forth  in Annex  3.1 (b) and in  Annex  3.1(m),  there  are no  outstanding
     subscriptions,  options,  warrants, rights, convertible securities or other
     agreements  or  commitments  of any  character  relating  to the  issued or
     unissued  capital stock or other  securities of Farmers Bancorp and Farmers
     National. After the Effective Time, Farmers Bancorp will have no obligation
     which is being  assumed  by ACNB or ACNB  North  which  will  result in any
     obligation to issue,  transfer or sell any shares of capital stock pursuant
     to any Employee Plan (as defined in Section 3.1 (m)).

(c)  Subsidiaries.
     -------------

     The only  subsidiaries  of Farmers  Bancorp are as listed and  described at
     Annex 3.l(c).  The only  subsidiaries of Farmers National are as listed and
     described at Annex  3.1(c).  Each such  subsidiary  is duly  organized  and
     existing  as a  corporation,  is in good  standing  under  the  laws of the
     jurisdiction in which it was organized, and has adequate corporate power to
     carry on its  business as now  conducted.  All of the  outstanding  capital
     stock of all such  subsidiaries has been validly issued,  is fully paid and
     nonassessable  (other than as provided at 12  U.S.C.ss.55)  and is owned by
     Farmers Bancorp or Farmers National, free and clear of

                                        9

<PAGE>

     all liens,  security interests and encumbrances.  All such subsidiaries are
     organized under Pennsylvania law and make no use of fictitious names in the
     conduct of their respective businesses.

(d)  Corporate Authority.
     -------------------

     Subject only to approval of this  Agreement by the holders of the number of
     votes required by Farmers  Bancorp's  articles of  incorporation  or bylaws
     cast by all holders of Farmers  Bancorp Common Stock (without any minority,
     class  or  series  voting  requirement),  and,  subject  to the  regulatory
     approvals  specified in Section 6.1(b) hereof,  Farmers Bancorp and Farmers
     National each has the requisite  corporate  power and authority,  and legal
     right, and has taken all corporate action necessary in order to execute and
     deliver this  Agreement and to consummate  the  transactions  applicable to
     either  Farmers  Bancorp  or Farmers  National  contemplated  hereby.  This
     Agreement  has been duly and  validly  executed  and  delivered  by Farmers
     Bancorp  and  Farmers  National  and  constitutes  the  valid  and  binding
     obligations of Farmers  Bancorp and Farmers  National  enforceable  against
     each, in accordance  with its terms,  except to the extent  enforcement  is
     limited  by  bankruptcy,   insolvency  and  other  similar  laws  affecting
     creditors' rights or the application by a court of equitable principles.

(e)  No Violations.
     --------------

     The execution,  delivery and  performance of this Agreement by it does not,
     and the  consummation of the  transactions  contemplated  hereby by it will
     not, constitute

     (i)  subject to receipt of the required  regulatory  approvals specified in
          Section 6.1(b), a breach or violation of, or a default under, any law,
          rule or regulation or any judgment, decree, order, governmental permit
          or  license,  to which  it (or any of its  respective  properties)  is
          subject,  which  breach,  violation  or default  would have a Material
          Adverse Effect on it, or enable any person to enjoin the Merger,

     (ii) a breach  or  violation  of,  or a  default  under  Farmers  Bancorp's
          articles of  incorporation,  the charter of Farmers  National,  or the
          bylaws of either of them, or

     (iii)except as disclosed in Annex  3.1(e),  a breach or violation  of, or a
          default  under (or an event  which with due notice or lapse of time or
          both would  constitute a default under),  or result in the termination
          of, accelerate the performance  required by, or result in the creation
          of any lien, pledge,  security  interest,  charge or other encumbrance
          upon any of the  properties  or assets  of it under any of the  terms,
          conditions or provisions of any note, bond, indenture,  deed of trust,
          loan agreement or other  agreement,  instrument or obligation to which
          it is a party, or to which any of its respective  properties or assets
          may be bound,  or  affected,  except  for any of the  foregoing  that,
          individually  or in the aggregate,  would not have a Material  Adverse
          Effect  on it or enable  any  person to  enjoin  the  Merger;  and the
          consummation of the transactions contemplated hereby, will not require
          any approval,  consent or waiver under any such law, rule, regulation,
          judgment,  decree,  order,  governmental  permit  or  license  or  the
          approval,  consent or waiver of any other party to any such agreement,
          indenture  or  instrument,  other  than  (w) all  required  approvals,
          consents and waivers of governmental authorities,  (x) the approval of
          its shareholders referred to in Section 6.1(a), (y) any such approval,
          consent or waiver that  already has been  obtained,  and (z) any other
          approvals,  consents or waivers, the absence of which, individually or
          in the

                                       10

<PAGE>

          aggregate,  would not  result in a  Material  Adverse  Effect on it or
          enable any person to enjoin the Merger.

(f)  Reports.

     (i)  Farmers Bancorp's  consolidated statement of financial condition as of
          December 31, 1997  previously  provided to ACNB and each  statement of
          financial  condition provided after the date hereof to ACNB (including
          in each case any related  notes and  schedules) as required by Section
          4.4 hereof  fairly  presents  or will  fairly  present  the  financial
          position of it as of its date and each of the statements of income and
          shareholders'  equity and of cash flows provided therewith  (including
          in each case any related notes and schedules), fairly presents or will
          fairly  present the results of  operations,  shareholders'  equity and
          cash  flows,  as the  case may be,  of it for the  periods  set  forth
          therein  (subject,  in the case of unaudited  interim  statements,  to
          normal year- end audit  adjustments that are not material in amount or
          effect), in each case in accordance with generally accepted accounting
          principles consistently applied during the periods involved, except as
          maybe noted therein.

     (ii) Except as set forth in Annex 3.1(f),  it has timely filed all material
          reports,  registrations  and statements,  together with any amendments
          required to be made with respect thereto, that it was required to file
          since  January 1, 1998 with (A) the Office of the  Comptroller  of the
          Currency (the "OCC"),  (B) the Federal Deposit  Insurance  Corporation
          (the "FDIC"), (C) the Board of Governors of the Federal Reserve System
          (the "Board"), (D) any state banking department or commission or other
          regulatory  authority  ("State  Regulator") and collectively  with the
          OCC,  the  FDIC,  and  the  Board,  the  "Farmers  Bancorp  Regulatory
          Agencies",  and (F) any  other  regulatory  authority,  and all  other
          material  reports  and  statements  required  to be  filed by it since
          January 1, 1998 including, without limitation, any report or statement
          required to be filed pursuant to the laws, rules or regulations of the
          United States or any Farmers Bancorp  Regulatory  Agency, and has paid
          all fees and assessments due and payable in connection therewith,  and
          no such  report,  registration  or  statement  contains  any  material
          misstatement  or omission or is  otherwise  in material  noncompliance
          with any law, regulation or requirement.

(g)  Absence of Certain  Changes  or Events.
     --------------------------------------

     Since January 1, 1998 to the date hereof,  it has not incurred any material
     liability,  except in the ordinary  course of its business  consistent with
     past  practice,  nor has there been any change in the financial  condition,
     properties,  assets,  business,  results of  operations  or prospects of it
     which,  individually or in the aggregate,  has had, or might  reasonably be
     expected to result in, a Material Adverse Effect on it.


                                       11

<PAGE>

(h)  Taxes.
     -----

     Its federal  income tax returns have been  examined and closed or otherwise
     closed by operation of law through  1988.  All  federal,  state,  local and
     foreign  tax  returns,   including,   but  not  limited  to,  any  and  all
     Pennsylvania  tax filings  arising under the Bank Shares Tax, Single Excise
     Tax and the Amended 1989 Bank Shares Tax and/or similar taxes,  required to
     be filed by it or on its behalf,  have been timely  filed,  or requests for
     extensions  have been timely filed and any such  extension  shall have been
     granted and not have expired, and, to the knowledge of management, all such
     filed returns are complete and accurate in all material respects. All taxes
     shown on such  returns,  and all taxes  required to be shown on returns for
     which  extensions  have been  granted,  have been paid in full or  adequate
     provision  has been  made  for any such  taxes  on its  balance  sheet  (in
     accordance with generally accepted accounting  principles) other than those
     taxes which are being contested in appropriate  forums in proceedings which
     are  being  diligently  pursued.  Adequate  provision  has been made on its
     balance sheet (in accordance with generally accepted accounting  principles
     consistently  applied)  for all  federal,  state,  local  and  foreign  tax
     liabilities  for periods  subsequent  to those for which  returns have been
     filed.  There is no audit  examination,  deficiency,  or refund  litigation
     pending  or, to the  knowledge  of Farmers  Bancorp  or  Farmers  National,
     threatened,  with respect to any taxes that could result in a determination
     that  would  have a Material  Adverse  Effect on it.  All taxes,  interest,
     additions   and  penalties  due  with  respect  to  completed  and  settled
     examinations or concluded  litigation relating to it have been paid in full
     or adequate provision has been made for any such taxes on its balance sheet
     (in accordance with generally accepted accounting  principles).  It has not
     executed  an  extension  or waiver of any  statute  of  limitations  on the
     assessment or collection of any tax due that is currently in effect.

(i) Litigation and Liabilities.
     ---------------------------

     Except as set forth in Annex  3.1(i),  there are no

     (i)  civil, criminal or administrative  actions,  suits, claims,  hearings,
          investigations or proceedings before any court, governmental agency or
          otherwise  pending  or, to the  knowledge  of  management,  threatened
          against it or

     (ii) obligations  or  liabilities,  whether or not accrued  (contingent  or
          otherwise,   including,   without   limitation,   those   relating  to
          environmental and occupational safety and health matters, or any other
          facts or  circumstances  of which its  management  is aware that could
          reasonably be expected to result in any claims  against or obligations
          or liabilities of it), that, alone or in the aggregate, are reasonably
          likely to have a Material  Adverse Effect on it or to hinder or delay,
          in any material respect, consummation of the transactions contemplated
          by this Agreement.

(j)  Absence of  Regulatory  Actions.
     --------------------------------

     It is not a party to any cease  and  desist  order,  written  agreement  or
     memorandum of  understanding  with, or a party to any commitment  letter or
     similar undertaking to, or is subject to any order or directive by, or is a
     recipient of any extraordinary  supervisory letter from, or has adopted any
     board  resolutions  at  the  request  of,  federal  or  state  governmental
     authorities,  including, without limitation, the Farmers Bancorp Regulatory
     Agencies,  charged  with the  supervision  or  regulation  of  financial or
     depository institutions or engaged

                                       12

<PAGE>

     in the insurance of bank  deposits,  nor has it been advised by any Farmers
     Bancorp  Regulatory  Agency  that such  body is  contemplating  issuing  or
     requesting (or is considering the appropriateness of issuing or requesting)
     any such order, directive, written agreement,  memorandum of understanding,
     extraordinary  supervisory letter,  commitment letter,  board resolution or
     similar undertaking.

(k)  Agreements.

     (i)  Except as set forth in Annex 3.1(k) attached hereto, as of the date of
          this  Agreement,  it is not a party  to,  or  bound  by,  any  oral or
          written:

          (A)  "material contract" as such term is defined in Item 601(b)(10) of
               Regulation S-K promulgated by the SEC;

          (B)  consulting  agreement not  terminable on thirty (30) days or less
               notice  involving the payment of more than $10,000 per annum,  in
               the case of any such agreement;

          (C)  agreement  with any officer or other key employee the benefits of
               which  are  contingent,  or the  terms  of which  are  materially
               altered,  upon the  occurrence  of a  transaction  of the  nature
               contemplated by this Agreement;

          (D)  agreement  with  respect  to any  officer  providing  any term of
               employment  or  compensation  guarantee  extending  for a  period
               longer than one year or for a payment in excess of $10,000;

          (E)  agreement  or  plan,  including  any  stock  option  plan,  stock
               appreciation   rights  plan,   employee  stock   ownership  plan,
               restricted stock plan or stock purchase plan, any of the benefits
               of which will be  increased,  or the  vesting of the  benefits of
               which  will  be  accelerated,  by  the  occurrence  of any of the
               transactions  contemplated  by this Agreement or the value of any
               of the benefits of which will be  calculated  on the basis of any
               of the transactions contemplated by this Agreement;

          (F)  agreement  containing covenants that limit its ability to compete
               in any line of business or with any person,  or that  involve any
               restriction on the geographic  area in which, or method by which,
               it may carry on its  business  (other  than as may be required by
               law or any regulatory agency);

          (G)  agreement, contract or understanding,  other than this Agreement,
               regarding the capital  stock of Farmers  Bancorp  and/or  Farmers
               National or  committing  to dispose of some or all of the capital
               stock

                                       13

<PAGE>

               or  substantially  all of the  assets of Farmers  Bancorp  and/or
               Farmers National; or

          (H)  collective bargaining agreement,  contract, or other agreement or
               understanding with a labor union or labor organization.

     (ii) It is not in default  under or in  violation  of any  provision of any
          note, bond, indenture,  mortgage, deed of trust, loan agreement, lease
          or other  agreement  to  which  it is a party  or to which  any of its
          respective  properties or assets is subject,  other than such defaults
          or violations as could not reasonably be expected,  individually or in
          the aggregate, to have a Material Adverse Effect on it.

(1)  Labor Matters.  It is not the subject of any  proceeding  asserting that it
     has  committed an unfair labor  practice or seeking to compel it to bargain
     with any labor  organization as to wages and conditions of employment,  nor
     is there any strike, other labor dispute or organizational effort involving
     it pending or threatened.

(m)  Employee  Benefit  Plans.  Annex  3.1(m)  contains a  complete  list of all
     pension,   retirement,  stock  option,  stock  purchase,  stock  ownership,
     savings,  stock appreciation right, profit sharing,  deferred compensation,
     consulting, bonus, group insurance,  severance and other employee benefits,
     incentive and welfare policies, contracts, plans and arrangements,  and all
     trust  agreements  related  thereto,  in respect  to any of its  present or
     former  directors,  officers or other  employees  (hereinafter  referred to
     collectively as the "Employee Plans").

     (i)  All of the Employee  Plans comply in all  material  respects  with all
          applicable requirements of the Employee Retirement Income Security Act
          of 1974, as amended ("ERISA"),  the Code and other applicable laws; it
          has not engaged in a "prohibited  transaction"  (as defined in Section
          406 of ERISA or Section 4975 of the Code) with respect to any Employee
          Plan  which is likely to result in any  material  penalties,  taxes or
          other events under Section 502(i) of ERISA or Section 4975 of the Code
          which would have a Material Adverse Effect on it.

     (ii) No liability to the Pension Benefit  Guaranty  Corporation has been or
          is expected by it to be incurred  with  respect to any  Employee  Plan
          which  is  subject  to Title IV of  ERISA  ("Pension  Plan"),  or with
          respect to any  "singleemployer  plan" (as  defined  in  Section  4001
          (a)(15) of ERISA) currently or formerly maintained by it or any entity
          which is  considered  one  employer  with  Farmers  Bancorp or Farmers
          National  under  Section  4001 of ERISA or Section 414 of the Code (an
          "ERISA Affiliate").

     (iii)No Pension Plan or  single-employer  plan of an ERISA Affiliate had an
          "accumulated funding deficiency" (as defined in Section 302 of ERISA

                                       14

<PAGE>

          (whether  or not  waived))  as of the  last day of the end of the most
          recent plan year ending prior to the date hereof; all contributions to
          any Pension Plan or  single-employer  plan of an ERISA  Affiliate that
          were  required  by Section 302 of ERISA and were due prior to the date
          hereof have been made on or before the respective  dates on which such
          contributions  were due;  the fair market  value of the assets of each
          Pension Plan or single-employer plan of an ERISA Affiliate exceeds the
          present  value of the  "benefit  liabilities"  (as  defined in Section
          4001(a)(16) of ERISA) under such Pension Plan or single  employer plan
          of an ERISA  Affiliate as of the end of the most recent plan year with
          respect to the respective Pension Plan or  single-employer  plan of an
          ERISA  Affiliate  ending prior to the date hereof,  calculated  on the
          basis of the actuarial  assumptions  used in the most recent actuarial
          valuation  for such Pension Plan or  single-employer  plan of an ERISA
          Affiliate as of the date hereof; and no notice of a "reportable event"
          (as defined in Section  4043 of ERISA) for which the 30-day  reporting
          requirement  has not been waived has been required to be filed for any
          Pension Plan or single-employer  plan of an ERISA Affiliate within the
          12-month period ending on the date hereof.

     (iv) Neither has it  provided,  nor is it required to provide,  security to
          any Pension Plan or to any single-employer  plan of an ERISA Affiliate
          pursuant to Section 401(a)(29) of the Code.

     (v)  Neither  it  nor  any  ERISA   Affiliate   has   contributed   to  any
          "multi-employer  plan," as defined in  Section  3(37) of ERISA,  on or
          after September 26, 1980.

     (vi) Each Employee Plan of it which is an "employee  pension  benefit plan"
          (as  defined in Section  3(2) of ERISA)  and which is  intended  to be
          qualified  under Section  401(a) of the Code (a "Qualified  Plan") has
          received a favorable  determination  letter from the Internal  Revenue
          Service ("IRS") covering the requirements of the Tax Equity and Fiscal
          Responsibility  Act of 1982, the Retirement Equity Act of 1984 and the
          Deficit  Reduction  Act of 1984 and the Tax Reform Act of 1986;  it is
          not aware of any  circumstances  likely to result in revocation of any
          such favorable  determination letter; each such Employee Plan has been
          amended  to  reflect  the   requirements  of  subsequent   legislation
          applicable to such plans;  and each Qualified Plan has complied at all
          relevant   times  in  all  material   respects  with  all   applicable
          requirements of Section 401(a) of the Code.

     (vii)Each Qualified Plan which is an "employee  stock  ownership  plan" (as
          defined in Section  4975(e)(7) of the Code) has at all relevant  times
          satisfied  all of the  applicable  requirements  of  Sections  409 and
          4975(e)(7) of the Code and the regulations thereunder.

     (viii) Neither it nor any ERISA Affiliate has committed any act or omission
          or engaged in any transaction  that has caused it to incur, or created
          a material

                                       15

<PAGE>


          risk that it may incur,  liability  for any excise tax under  Sections
          4971  through  4980B  of the  Code,  other  than  excise  taxes  which
          heretofore  have  been  paid  and  fully  reflected  in its  financial
          statements.

     (ix) There is no pending or threatened litigation, administrative action or
          proceeding  relating to any Employee  Plan,  other than routine claims
          for benefits.

     (x)  There has been no announcement or legally binding  commitment by it to
          create an  additional  Employee  Plan,  or to amend an Employee  Plan,
          except  for  amendments  required  by  applicable  law  which  do  not
          materially  increase the cost of such Employee  Plan,  and it does not
          have any  obligations  for retiree  health and life benefits under any
          Employee  Plan  that  cannot  be  terminated   without  incurring  any
          liability thereunder.

     (xi) The execution and delivery of this Agreement and the  consummation  of
          the transactions contemplated hereby will not result in any payment or
          series of  payments  by Farmers  Bancorp or  Farmers  National  to any
          person which is an "excess  parachute  payment" (as defined in Section
          280G of the Code)  under any  Employee  Plan,  increase  any  benefits
          payable under any Employee  Plan, or accelerate the time of payment or
          vesting of any such benefit.

     (xii)All  annual  reports  have been  filed  timely  with  respect  to each
          Employee  Plan, it has made  available to ACNB a true and correct copy
          of (A) reports on the  applicable  form of the Form 5500 series  filed
          with the IRS for plan years  beginning  after 1987,  (B) such Employee
          Plan,  including  amendments  thereto,  (C) each trust  agreement  and
          insurance   contract   relating  to  such  Employee  Plan,   including
          amendments  thereto,  (D) the most recent summary plan description for
          such Employee Plan, including amendments thereto, if the Employee Plan
          is subject to Title I of ERISA,  (E) the most recent  actuarial report
          or valuation if such  Employee Plan is a Pension Plan and (F) the most
          recent determination letter issued by the IRS if such Employee Plan is
          a Qualified Plan.

     (xiii) There are no retiree  health  benefit plans except as required to be
          maintained by COBRA.

(n) Title to Assets.
     ----------------

     It has good and  marketable  title to its properties and assets (other than
     property as to which it is lessee),  except for (i) such items shown in the
     Farmers Bancorp consolidated  financial  statements or notes thereto;  (ii)
     liens on real property for current real estate taxes not yet delinquent; or
     (iii)  such  defects  in title  which  would  not,  individually  or in the
     aggregate,  have a  Material  Adverse  Effect on it.  With  respect  to any
     property  leased by it,  there are no  defaults  by it, or any of the other
     parties thereto, or any events which, with the giving of notice or lapse of
     time or both,  would  become  defaults  by it or any of the  other  parties
     thereto, under any of

                                       16

<PAGE>


     such  leases,   except  for  such  defaults  or  events  which  would  not,
     individually or in the aggregate, have a Material Adverse Effect on it; and
     all such  leases are in full force and effect and are  enforceable  against
     it, as the case may be,  and there is no  circumstance  existing  as of the
     date of this  Agreement  which  causes  or would  cause  such  leases to be
     unenforceable  against any of the other parties  thereto except as the same
     may be limited by  bankruptcy,  insolvency,  reorganization,  moratorium or
     similar  laws  affecting  the  rights  of  creditors  generally  as well as
     principles  of equity  to the  extent  enforcement  by a court of equity is
     required.

(o) Compliance with Laws.
     ---------------------

     It has  all  permits,  licenses,  certificates  of  authority,  orders  and
     approvals  of, and has made all  filings,  applications  and  registrations
     with, federal,  state, local and foreign  governmental or regulatory bodies
     that are  required in order to permit it to carry on its  business as it is
     presently conducted and the absence of which could,  individually or in the
     aggregate,  have a  Material  Adverse  Effect  on  it;  all  such  permits,
     licenses, certificates of authority, orders and approvals are in full force
     and effect, and no suspension or cancellation of any of them is threatened.

(p)  Fees.
     -----

     Except as set forth in Annex 3.1(p) attached hereto,  neither it nor any of
     its respective  officers,  directors,  employees or agents has employed any
     broker or finder or incurred any liability for any financial advisory fees,
     brokerage fees, commissions,  or finder's fees, and no broker or finder has
     acted  directly or indirectly  for it in connection  with this Agreement or
     the transactions contemplated hereby.

(q)  Environmental  Matters.
     ----------------------

     For  purposes  of this  Section  3.1,  the  following  terms shall have the
     indicated meaning:

          "Environmental  Law" means any federal,  state or local law,  statute,
          ordinance,  rule, regulation,  code, license,  permit,  authorization,
          approval,  consent, order, judgment,  decree,  injunction or agreement
          with any governmental entity relating to: the protection, preservation
          or restoration of the environment (including, without limitation, air,
          water  vapor,  surface  water,  groundwater,  drinking  water  supply,
          surface  soil,  subsurface  soil,  plant and animal  life or any other
          natural  resource);  and  the  use,  storage,  recycling,   treatment,
          generation,    transportation,    processing,    handling,   labeling,
          production,  release or disposal  of  Hazardous  Substances.  The term
          Environmental  Law  includes  without  limitation:  the  Comprehensive
          Environmental Response, Compensation and Liability Act, as amended, 42
          U.S.C.  ss.9601, et seq., the Resource  Conservation and Recovery Act,
          as amended, 42 U.S.C. ss.6901, et seq., the Clean Air Act, as amended,
          42 U.S.C.  ss.7401,  et seq., the Federal Water Pollution Control Act,
          as amended,  33 U.S.C.  ss.1251, et seq., the Toxic Substances Control
          Act, as amended,  15 U.S.C.  ss.9601,  et seq., the Emergency Planning
          and Community Right to Know Act, 42 U.S.C. ss.11001, et seq., the Safe
          Drinking  Water Act, 42 U.S.C.  ss.300f,  et seq.,  and all comparable
          state and local laws; and any common law (including without limitation
          common law that may impose strict liability) that may impose liability
          or obligation for injuries or damages

                                       17

<PAGE>

          due to, or  threatened  as a result of, the presence of or exposure to
          any Hazardous Substance.

          "Hazardous  Substance" means any substance presently listed,  defined,
          designated or classified as hazardous, toxic, radioactive or dangerous
          or otherwise regulated under any Environmental Law, whether by type or
          by quantity, including any material containing any such substance as a
          component.  Hazardous  Substances include without limitation petroleum
          or  any  derivative  or  by-product  thereof,  asbestos,   radioactive
          material, and polychlorinated biphenyls.

          "Farmers  National  Loan  Portfolio  Properties  and Other  Properties
          Owned"  means  those  properties  serving as  collateral  for loans in
          Farmers National's loan portfolio,  or properties owned or operated by
          Farmers  National  (including,  without  limitation,  in  a  fiduciary
          capacity).

     Except as set forth on Annex 3.1(q) hereto:

          (i)  Neither  Farmers  Bancorp nor Farmers  National has been or is in
               violation of or liable under any Environmental Law.

          (ii) To the knowledge of Farmers Bancorp and Farmers National, none of
               the  Farmers   National  Loan  Portfolio   Properties  and  Other
               Properties Owned have been or are in violation of or liable under
               any Environmental Law.

          (iii)Neither  Farmers  Bancorp nor Farmers  National has any knowledge
               that any environmental contaminant, pollutant, toxic or hazardous
               waste or  other  similar  substance  has  been  generated,  used,
               stored, processed, disposed of or discharged onto any of the real
               estate now or  previously  owned or acquired  (including  without
               limitation  any real estate  acquired by means of  foreclosure or
               exercise  of any other  creditor's  right)  or leased by  Farmers
               National,  except as disclosed on Annex  3.1(q).  In  particular,
               without limiting the generality of the foregoing sentence, except
               as disclosed on Annex 3.1(q), neither Farmers Bancorp nor Farmers
               National have any knowledge  that:  (i) any materials  containing
               asbestos have been used or  incorporated in any building or other
               structure or improvement located on any of the real estate now or
               previously owned or acquired  (including  without  limitation any
               real estate  acquired by means of  foreclosure or exercise of any
               other  creditor's  right) or leased by Farmers Bancorp or Farmers
               National;  (ii) any electrical  transformers,  fluorescent  light
               fixtures with ballasts or other equipment containing PCB's are or
               have been  located on any of the real  estate  now or  previously
               owned or acquired  (including  without limitation any real estate
               acquired  by  means  of  foreclosure  or  exercise  of any  other
               creditor's  right)  or  leased  by  Farmers  Bancorp  or  Farmers
               National;  (iii) any underground storage tanks for the storage of
               gasoline, petroleum products or other toxic

                                       18

<PAGE>


               or hazardous  substances  are or have ever been located on any of
               the real estate now or  previously  owned or acquired  (including
               without   limitation  any  real  estate   acquired  by  means  of
               foreclosure or exercise of any other creditor's  right) or leased
               by Farmers Bancorp or Farmers National.

          (iv) Except  as  previously  disclosed  in Annex  3.1(q),  there is no
               legal,  administrative,  arbitration or other proceeding,  claim,
               action,  cause of action  or  governmental  investigation  of any
               nature  seeking to impose,  or that,  to the knowledge of Farmers
               Bancorp or Farmers  National,  could result in the  imposition on
               Farmers  Bancorp or Farmers  National  of any  liability  arising
               under  any  local,  state  or  federal   environmental   statute,
               regulation  or  ordinance  including,   without  limitation,  the
               Comprehensive Environmental Response,  Compensation and Liability
               Act of 1980, as amended,  pending or threatened  against  Farmers
               Bancorp or Farmers National;  to the knowledge of Farmers Bancorp
               and Farmers  National,  there is no reasonable basis for any such
               proceeding,  claim,  action or  governmental  investigation;  and
               neither  Farmers  Bancorp nor Farmers  National is subject to any
               agreement,  order, judgment,  decree or memorandum by or with any
               court,  governmental authority,  regulatory agency or third party
               imposing any such liability.

(r)  Allowance.
     ----------

     The  allowance  for loan  and  lease  losses  shown  on  Farmers  Bancorp's
     consolidated  statement of financial condition as of December 31, 1997 was,
     and the  allowance  for loan and lease  losses  shown on Farmers  Bancorp's
     consolidated  statement of financial condition for periods ending after the
     date of this  Agreement  will be, in the opinion of  management  of Farmers
     Bancorp and  Farmers  National,  adequate,  as of the date  thereof,  under
     generally accepted accounting principles applicable to commercial banks and
     all other  applicable  regulatory  requirements  for all losses  reasonably
     anticipated in the Ordinary Course of Business as of the date thereof based
     on  information  available  as of such date.  It has  disclosed  to ACNB in
     writing  prior  to the  date  hereof  the  amounts  of all  loans,  leases,
     advances, credit enhancements,  other extensions of credit, commitments and
     interest-bearing  assets of it that it has classified  internally as "Other
     Loans Specially Mentioned," "Special Mention,"  "Substandard,"  "Doubtful,"
     "Loss," "Classified," "Criticized," "Credit Risk Assets," "Concerned Loans"
     or words of similar  import,  and it shall disclose  promptly to ACNB after
     the end of each quarter after the date hereof and on the Effective Date the
     amount of each such  classification.  It has  disclosed  to ACNB in writing
     prior to the date  hereof the  amounts of all  overdrafts  occurring  since
     January  1, 1998 and it shall  disclose  promptly  to ACNB after the end of
     each quarter after the date hereof and on the Effective  Date the amount of
     such overdrafts.  The OREO and in-substance foreclosures included in any of
     its non-performing  assets are carried net of reserves at the lower of cost
     or  market  value  based  on  current  independent  appraisals  or  current
     management appraisals.


                                       19

<PAGE>

(s)  Anti-takeover  Provisions  Applicable.
     --------------------------------------

     The  provisions  of  Chapter  25 of the  PBCL  relating  to  protection  of
     shareholders do not apply to Farmers  Bancorp,  this Agreement,  the Merger
     and the transactions contemplated hereby.

(t)  Material  Interests of Certain  Persons.
     ---------------------------------------

     Except  as  noted in  Annex  3.1(t),  none of its  respective  officers  or
     directors,  or any "associate" (as such term is defined in Rule 12b-2 under
     the  Securities  Exchange  Act of 1934  (the  "Exchange  Act")) of any such
     officer or director,  has any material interest in any material contract or
     property (real or personal),  tangible or intangible, used in or pertaining
     to its business.

(u)  Insurance.
     ----------

     It is presently  insured,  and has been insured,  in the amounts,  with the
     companies  and since the  periods  set  forth in Annex  3.1(u).  All of the
     insurance policies and bonds maintained by it are in full force and effect,
     it is not in default  thereunder and all material  claims  thereunder  have
     been filed in due and timely  fashion.  In the judgment of its  management,
     such insurance coverage is adequate.

(v)  Dividends.
     ----------

     The only dividends or other  distributions which it has made on its capital
     stock since January 1, 1997 are set forth in Annex 3.1(v).

(w) Books and Records.
     -------------------

     Its books and records have been,  and are being,  maintained  in accordance
     with  applicable  legal and  accounting  requirements  and  reflect  in all
     material  respects the substance of events and transactions  that should be
     included therein.

(x)  Board  Action.
     --------------

     Its board of  directors  (at a meeting  duly called and held) has been duly
     convened and by the requisite vote of the directors (a) determined that the
     Merger is advisable and in the best  interests of it and its  shareholders,
     (b) approved this Agreement and the transactions  contemplated  hereby, and
     (c)  directed  that the  Agreement be submitted  for  consideration  by its
     shareholders  at the Farmers  Bancorp  Shareholders'  Meeting (as hereafter
     defined)  with  the  recommendation  of the  board  of  directors  that the
     shareholders approve the merger and the transactions contemplated thereby.

(y)  Fairness Opinions.
     ------------------

     Its board of directors has received a written opinion,  a copy of which has
     been furnished to ACNB, to the effect that the consideration to be received
     by  its  shareholders  pursuant  to  this  Agreement,  at the  time  of its
     execution, is fair to such holders from a financial point of view.

(z)  Fidelity  Bonds.
     ----------------

     Since at  least  December  31,  1990,  Farmers  National  has  continuously
     maintained  fidelity  bonds  insuring it against acts of  dishonesty by its
     employees  in such amounts as is  customary  for a bank of its size.  Since
     December 31, 1990, the aggregate  amount of all potential claims under such
     bonds has not  exceeded  $10,000  and neither  Farmers  Bancorp nor Farmers
     National is aware of any facts which would  reasonably  form the basis of a
     claim under such bonds.  Neither Farmers  Bancorp nor Farmers  National has
     reason to believe that its fidelity coverage

                                       20

<PAGE>

     will not be renewed by its carrier on  substantially  the same terms as its
     existing coverage.

     (aa) Condition of Tangible Assets.
          -----------------------------

          Except as set forth in Annex 3.1(aa),  all  buildings,  structures and
          improvements  on the real  property  owned or leased by it are in good
          condition,  ordinary  wear  and  tear  excepted,  and  are  free  from
          structural defects in all material respects. The equipment,  including
          heating, air conditioning and ventilation equipment owned by it, is in
          good  operating  condition,  ordinary  wear  and  tear  excepted.  The
          operation  and use of the  property  in the  business  conform  in all
          material  respects to all applicable  laws,  ordinances,  regulations,
          permits, licenses and certificates.

     (bb) Loans by Farmers National.
          --------------------------

          Since December 31, 1994 and except as shown on Annex  3.1(bb),  in the
          aggregate,  the loans by Farmers  National  have been  lawfully  made,
          constitute  valid  debts of the  obligors,  have been  incurred in the
          Ordinary  Course of  Business,  are subject to the terms of payment as
          shall  have  been  agreed  upon  between  Farmers  National  and  each
          customer, and Farmers National does not know of any applicable set-off
          or counterclaim  which in the aggregate would have a Material  Adverse
          Effect on it. A list of all loans thirty (30) days or more past due as
          of May 30, 1998,  and as of the last day of each month for each of the
          preceding  twelve  (12)  months  thereto is  attached  hereto as Annex
          3.1(bb)-A.  No  part  of the  amount  collectible  under  any  loan is
          contingent upon  performance by Farmers National of any obligation and
          no  agreement  for  participation,   in  which  Farmers  National  has
          relinquished  or  agreed  to share  control  with a  participation  in
          management of the facility,  or agreement  providing for deductions or
          discounts  have  been  made with  respect  to any part of such  debts,
          except as expressly disclosed in Annex 3.1(bb).  Farmers National does
          not know of any pending,  threatened or expected actions in connection
          with any material loans or commitments presently or previously made by
          Farmers  National  relating to claims  based on theories of  "lenders'
          liability" or any other basis.

     (cc) Regulatory  Compliance - OCC.
          -----------------------------

          Farmers  National is in compliance  in all material  respects with the
          applicable  rules and regulations of the OCC, except as noted in Annex
          3.1(cc).

     (dd) Regulatory  Compliance - FDIC.
          ------------------------------

          Except as noted on Annex  3.1(dd)  hereto and except where the failure
          to comply  would not have a  Material  Adverse  Effect on it, it is in
          compliance in all material  respects with the rules and regulations of
          the  FDIC  to  the  extent  such  rules  and  regulations  are  deemed
          applicable by regulatory determination.

     (ee) Capital Compliance.
          -------------------

          As of the date of this Agreement,  Farmers  National was in compliance
          with the minimum capital  requirements  applicable to national banking
          associations,  including as to leverage ratio  requirements,  tangible
          capital requirements and risk based capital requirements.

                                       21

<PAGE>

     (ff) Year 2000  Compliance.
          ----------------------

          Farmers  Bancorp  and  Farmers  National  are in  compliance  with all
          requirements   announced  or  promulgated   by  the  Farmers   Bancorp
          Regulatory   Agencies  and  by  the  Federal  Financial   Institutions
          Examination Council in connection with Year 2000 preparedness and
          compliance.

     (gg) Assessments  Fully Paid.
          ------------------------

          All  payments,  fees and  charges  assessed by  appropriate  state and
          federal agencies against Farmers National,  and due on or prior to the
          date of this Agreement, have been paid in full.

     (hh) Annual Reports and Financial Statements.
          ----------------------------------------

          Farmers  Bancorp has delivered to ACNB true and complete copies of (i)
          its  Balance   Sheets,   Statements   of   Earnings,   Statements   of
          Stockholders'  Equity and Statements of Cash Flows of Farmers  Bancorp
          for the years ended  December  31, 1997,  1996 and 1995,  certified by
          independent public  accountants,  and (ii) Farmers Bancorp's Quarterly
          Reports for the quarter  ended March 31,  1998,  containing  unaudited
          consolidated  balance  sheets of Farmers  Bancorp as at such dates and
          unaudited  consolidated  statements  of  earnings  and  cash  flows of
          Farmers Bancorp for the three month period reflected therein.  Farmers
          Bancorp  has also  delivered  to ACNB true and  correct  copies of its
          annual reports to shareholders  for the years 1997, 1996 and 1995. All
          such reports (collectively,  the "Farmers Bancorp Reports") (i) comply
          in all  material  respects  with  the  requirements  of the  Financial
          Accounting  Standards  Board  ("FASB") and the  American  Institute of
          Certified Public Accountants, (ii) do not contain any untrue statement
          of a  material  fact and  (iii) do not omit to state a  material  fact
          required  to be  stated  therein  or  necessary  in  order to make the
          statements  therein,  in light of the  circumstances  under which they
          were made, not misleading. No documents to be filed by Farmers Bancorp
          with  the  SEC  or any  regulatory  agency  in  connection  with  this
          Agreement,  or the transactions  contemplated  hereby will contain any
          untrue statement of a material fact or omit to state any material fact
          required  to be stated  therein or  necessary  to make the  statements
          therein,  in light of the circumstances under which they are made, not
          misleading.  All documents  which Farmers  Bancorp is responsible  for
          filing with the SEC or any  regulatory  agency in connection  with the
          Merger  will  comply  as to form in all  material  respects  with  the
          requirements of applicable law.

     (ii) Proxy  Statement/Prospectus,  Etc.
          ----------------------------------

          Except for information  relating to ACNB and its  subsidiaries and pro
          forma financial information reflecting the combined operations of ACNB
          and Farmers Bancorp,  neither (i) the Proxy  Statement/Prospectus  (as
          defined  herein at Section  5.1(b))  or any  amendment  or  supplement
          thereto,  at the  time it is  filed  with  the  SEC,  at the  time the
          Registration  Statement (as defined  hereinafter at Section 5.1(b)) is
          declared  effective,  at the time the  Proxy  Statement/Prospectus  is
          mailed to the  shareholders  of Farmers  Bancorp or at the date of the
          meeting of the Farmers Bancorp  shareholders at which the shareholders
          will  consider this  Agreement  (the  "Farmers  Bancorp  Shareholders'
          Meeting") nor (ii) any other  documents to be filed by Farmers Bancorp
          with  the  SEC  or any  regulatory  agency  in  connection  with  this
          Agreement, or the transactions contemplated hereby,

                                       22

<PAGE>


          will contain any untrue  statement  of material  fact or omit to state
          any material fact  required to be stated  therein or necessary to make
          the statements therein, in light of the circumstances under which they
          are made, not misleading.

     (jj) Significant  Customers.
          -----------------------

          All  significant  customers of Farmers Bancorp are identified in Annex
          3.1(jj).  For purposes of this Section 3.1, a  "significant  customer"
          shall mean any customer  who, at any time between  January 1, 1997 and
          the date of this Agreement, had or has (i) aggregate outstanding loans
          in the amount of $50,000 or more, or (ii) aggregate  daily deposits in
          the amount of $50,000 or more.

     (kk) Complete and Accurate  Disclosure.
          ---------------------------------

          Neither  this  Agreement  (insofar  as it relates to Farmers  Bancorp,
          Farmers Bancorp Common Stock and Farmers Bancorp's  involvement in the
          transactions   contemplated   hereby)  nor  any  financial  statement,
          schedule  (including  without limitation the Annexes attached hereto),
          certificate,  or other  statement  or  document  delivered  by Farmers
          Bancorp to ACNB and ACNB North in  connection  herewith  contains  any
          statement which, at the time and in light of the  circumstances  under
          which it is made, is false or misleading  with respect to any material
          fact or  omits  to  state  any  material  fact  necessary  to make the
          statements  contained  herein or therein not false or  misleading.  In
          particular, without limiting the generality of the foregoing sentence,
          the  information  provided  and the  representations  made by  Farmers
          Bancorp to ACNB in connection with the Registration Statement, both at
          the time such  information and  representations  are provided and made
          and at the  time of the  Closing,  will be true  and  accurate  in all
          material  respects  and  will not  contain  any  false  or  misleading
          statement  with  respect  to any  material  fact or omit to state  any
          material fact  necessary (i) to make the  statements  made therein not
          false or misleading,  or (ii) to correct any statement contained in an
          earlier   communication   with   respect   to  such   information   or
          representations which has become false or misleading.

     (ll) Beneficial  Ownership  of ACNB Common  Stock.
          --------------------------------------------

          Prior to the  Effective  Date,  Farmers  Bancorp and its  officers and
          directors  will not in the  aggregate  own  beneficially  (within  the
          meaning of SEC Rule  13d-3(d)(1))  more than five  percent (5%) of the
          outstanding shares of ACNB Common Stock.

     (mm) Non-Registration  Under the 1934 Act.
          -------------------------------------

          Farmers Bancorp Common Stock is neither  registered nor required to be
          registered  under  Section 12 of the  Securities  Exchange Act of 1934
          (the  "1934  Act")  and  is not  subject  to  the  periodic  reporting
          requirements imposed by Section 13 or 15(d) of the 1934 Act.

     (nn) Deposit Insurance.
          ------------------

          The  deposits of Farmers  National  are insured by the Bank  Insurance
          Fund, as  administered by the Federal  Deposit  Insurance  Corporation
          ("FDIC") in accordance  with the Federal  Deposit  Insurance  Act, and
          Farmers  National  has paid all  assessments  and  filed  all  reports
          required by the Federal Deposit Insurance Act.


                                       23

<PAGE>

     (oo) Repurchase Agreements.
          ----------------------

          With respect to any agreement  pursuant to which  Farmers  Bancorp has
          purchased  securities  subject  to an  agreement  to  resell,  if any,
          Farmers Bancorp has a valid, perfected first lien or security interest
          in  the  government   securities  or  other  collateral  securing  the
          repurchase  agreement,  and the  value of such  collateral  equals  or
          exceeds the amount of the debt secured thereby. Except as disclosed on
          Annex  3.1(oo),  which  identifies  location  and type of  securities,
          Farmers Bancorp maintains physical possession of purchased  securities
          that are subject to an agreement to resell.

     (pp) Assumability  of  Contracts  and Leases.
          ----------------------------------------

          Except as disclosed on Annex 3.1(pp),  all Material  Contracts between
          Farmers Bancorp or Farmers National and any other entity or person are
          assumable and assignable and do not contain any term or provision that
          would  accelerate or increase  payments that would otherwise be due by
          Farmers  Bancorp  or Farmers  National  to such  person or entity,  or
          change or modify the provisions or terms of such leases, contracts and
          agreements   by  reason  of  this   Agreement   or  the   transactions
          contemplated hereby.  Except as disclosed on Annex 3.1(pp), each lease
          pursuant  to which  Farmers  Bancorp or Farmers  National,  as lessee,
          leases real or personal  property is valid and in effect in accordance
          with its respective terms, and there is not, under any of such leases,
          on the part of the lessee,  any material existing default or any event
          which with notice or lapse of time, or both,  would  constitute such a
          default,  other than defaults which would not  individually  or in the
          aggregate have a material  adverse effect on the financial  condition,
          business, prospects, or operating results of Farmers Bancorp.

     (qq) Absence of  Questionable  Payments.
          -----------------------------------

          From and after December 31, 1992 neither  Farmers  Bancorp nor Farmers
          National  has,  nor, to the  knowledge  of Farmers  Bancorp or Farmers
          National, has any director,  officer,  agent, employee,  consultant or
          other person  associated  with or acting on behalf of, Farmers Bancorp
          or Farmers  National (i) used any Farmers Bancorp or Farmers  National
          corporate funds for unlawful  contributions,  gifts,  entertainment or
          unlawful  expenses  relating to political  activity;  or (ii) made any
          direct or indirect  unlawful  payments to governmental  officials from
          any  Farmers  Bancorp  or  Farmers   National   corporate   funds,  or
          established  or maintained  any unlawful or  unrecorded  accounts with
          funds received from Farmers Bancorp or Farmers National.

     (rr) Powers of Attorney;  Guarantees.
          --------------------------------

          Except as set forth on Annex 3.1(rr),  Farmers  National does not have
          any power of attorney  outstanding,  or any  obligation  or  liability
          either  actual,  constructive  or  contingent,  as guarantor,  surety,
          cosigner,   endorser,   co-maker  or  indemnitor  in  respect  of  the
          obligation of any person,  corporation,  partnership,  joint  venture,
          association,  organization  or other  entity,  except  for  letters of
          credit issued in the Ordinary  Course of Business  which are listed on
          Annex 3.1(rr)

     (ss) Adjustable Rate Mortgages.
          -------------------------

          Farmers  National  has  made  all  interest  rate  adjustments  to any
          mortgage  loan  according to the terms of said  mortgage  loan and has
          complied

                                       24

<PAGE>

          and is in compliance in all material respects with all federal,  state
          and other applicable laws,  rules and regulations,  including  orders,
          writs,  decrees,  injunctions  and other  requirements of any court or
          governmental  authorities  having  jurisdiction  over  adjustable rate
          mortgages.

     (tt) CRA   Compliance.
          -----------------

          Farmers National has received a satisfactory compliance rating and has
          received a satisfactory  Community  Reinvestment  Act rating.  Farmers
          National has no knowledge  of any facts or  circumstances  which would
          prevent it from  receiving  such  satisfactory  ratings  upon its next
          appropriate examination.

     (uu) Derivatives.
          ------------

          Except as set forth on Annex 3.1(uu), Farmers National does not own or
          hold  any  derivatives,   "caps",  or  "floors",   in  its  investment
          portfolio.

     (vv) Accuracy of Representations.
          ---------------------------

          Until, and as of Closing, Farmers Bancorp will promptly notify ACNB if
          any of the  representations  contained in this Section 3.1 cease to be
          true  and  correct  subsequent  to  the  date  hereof.   Further,   no
          representations  made by Farmers Bancorp or Farmers National  pursuant
          to this  Agreement  contain any untrue  statement of material  fact or
          omit to state a material  fact  necessary to make the  statements  not
          misleading.

SECTION 3.2 Representations and Warranties of ACNB.

     ACNB represents and warrants to Farmers Bancorp and Farmers  National that,
as of even date  herewith and except as  specifically  disclosed in the Annex of
disclosure schedules included herewith, as follows:

(a)  Authority.
     ----------

     The execution and delivery of this  Agreement and the  consummation  of the
     transactions  contemplated  herein have been duly and validly authorized by
     the Board of Directors of ACNB, and no other  corporate  action on the part
     of ACNB is  necessary to  authorize  the approval of this  Agreement or the
     consummation of the transactions  contemplated  herein.  This Agreement has
     been duly executed and delivered by ACNB and,  assuming due  authorization,
     execution and delivery by Farmers Bancorp,  receipt of required  regulatory
     approvals and the approval of the Farmers Bancorp shareholders, constitutes
     a valid  and  binding  obligation  of  ACNB,  enforceable  against  ACNB in
     accordance with its terms,  except to the extent  enforcement is limited by
     bankruptcy,  insolvency and other similar laws affecting  creditor's rights
     or principles  of equity.  Assuming  regulatory  approval,  the  execution,
     delivery and consummation of this Agreement will not constitute a violation
     or breach of or default under the Articles of  Incorporation  or the Bylaws
     of  ACNB  or any  statute,  rule,  regulation,  order,  decree,  directive,
     agreement,  indenture  or other  instrument  to which ACNB is a party or by
     which ACNB or any of its properties are bound.

                                       25

<PAGE>


(b) Organization and Standing.
     ----------------------------

     ACNB is a business corporation that is duly organized, validly existing and
     in good standing under the laws of the Commonwealth of  Pennsylvania.  ACNB
     is a registered  bank holding company under the Bank Holding Company Act of
     1956, as amended,  and has full power and lawful  authority to own and hold
     its properties and to carry on its present business. ACNB owns, directly or
     indirectly  all of the issued and  outstanding  shares of capital  stock of
     ACNB North, Inc. and Adams County National Bank. Adams County National Bank
     is a national  banking  association  validly  existing and in good standing
     under the laws of the United  States,  and is duly  authorized to engage in
     the banking business as an insured bank under the Federal Deposit Insurance
     Act, as amended.  Adams County  National  Bank is  authorized  to engage in
     trust activities.

(c)  Capitalization.
     ---------------

     The   authorized   capital  stock  of  ACNB  consists  of  twenty   million
     (20,000,000)  shares of common stock, par value Two Dollars and Fifty Cents
     ($2.50) per share ("ACNB  Common  Stock") of which,  as of the date of this
     Agreement,  5,253,278 shares were issued and  outstanding.  All outstanding
     shares  of ACNB  Common  Stock  have  been  duly  issued  and  are  validly
     outstanding, fully paid and nonassessable.  The shares of ACNB Common Stock
     to be issued in connection  with the Merger have been duly  authorized and,
     when issued in accordance with the terms of this Agreement, will be validly
     issued, fully paid and nonassessable.

(d) Articles of Incorporation and Bylaws.
     ----------------------------------------

     The copies of the Articles of Incorporation, as amended, and of the Bylaws,
     as amended,  of ACNB which have been delivered to Farmers Bancorp are true,
     correct, and complete in all material respects.

(e)  Annual  Reports and  Financial  Statements.
     -------------------------------------------

     ACNB has  delivered  to Farmers  Bancorp  true and  complete  copies of (i)
     ACNB's Annual Report on Form 10-K for ACNB's fiscal year ended December 31,
     1997,  containing  consolidated balance sheets of ACNB at December 31, 1997
     and December 31, 1996 and consolidated  statements of earnings,  changes in
     shareholders'  equity  and cash  flows of ACNB for the  three  years  ended
     December 31, 1997,  1996 and 1995, and such financial  statements have been
     certified by Stambaugh-Ness, P.C., and (ii) ACNB's Quarterly Report on Form
     10-Q  for  the  quarter   ended  March  31,  1998,   containing   unaudited
     consolidated  balance  sheets  of  ACNB  as  at  such  date  and  unaudited
     consolidated  statement  of  earnings  and  cash  flows  of  ACNB  for  the
     three-month  period reflected  therein.  ACNB has also delivered to Farmers
     Bancorp true and correct  copies of its annual reports on Form 10-K for the
     years 1997, 1996 and 1995, together with its annual reports to shareholders
     for the same periods. All such reports  (collectively,  the "ACNB Reports")
     (i) comply in all material  respects with the requirements of the rules and
     regulations  of the SEC,  (ii) do not  contain  any untrue  statement  of a
     material fact and (iii) do not omit to state a material fact required to be
     stated  therein or necessary in order to make the  statements  therein,  in
     light of the circumstances  under which they were made, not misleading.  No
     documents  to be filed by ACNB  with the SEC or any  regulatory  agency  in
     connection with this Agreement,  or the  transactions  contemplated  hereby
     will contain any untrue statement of a material fact

                                       26

<PAGE>

     or omit to state  any  material  fact  required  to be  stated  therein  or
     necessary to make the  statements  therein,  in light of the  circumstances
     under which they are made,  not  misleading.  All  documents  which ACNB is
     responsible for filing with the SEC or any regulatory  agency in connection
     with the Merger will comply as to form in all  material  respects  with the
     requirements of applicable law.

(f)  Absence of Undisclosed Liabilities.
     -----------------------------------

     Except as disclosed in Annex  3.2(f) or as  reflected  noted or  adequately
     reserved  against in the ACNB Balance Sheet, at March 31, 1998, ACNB had no
     material liabilities (whether accrued,  absolute,  contingent or otherwise)
     which are required to be reflected, noted or reserved against therein under
     generally accepted accounting principles or which are in any case or in the
     aggregate  material.  Except as described in Annex  3.2(f),  since June 30,
     1998,  ACNB has not incurred any such liability  other than  liabilities of
     the same nature as those set forth in the ACNB Balance Sheet,  all of which
     have been reasonably incurred in the Ordinary Course of Business.

(g) Absence of Changes.
     -------------------

     Since March 31, 1998, there has not been any material and adverse change in
     the condition  (financial or  otherwise),  assets,  liabilities,  business,
     operations or future prospects of ACNB.

(h)  Litigation.
     -----------

     Except  as  disclosed  in  Annex  3.2(h):   (i)  there  is  no  litigation,
     investigation  or  proceeding   pending,   or  to  the  knowledge  of  ACNB
     threatened,  that involves ACNB or its  properties  and that, if determined
     adversely to ACNB,  would  materially  and  adversely  affect the condition
     (financial or  otherwise),  assets,  liabilities,  business,  operations or
     future  prospects of ACNB;  (ii) there are no  outstanding  orders,  writs,
     injunctions,  decrees,  consent  agreements,  memoranda of understanding or
     other  directives  of any  federal,  state or local  court or  governmental
     authority or of any arbitration  tribunal against ACNB which materially and
     adversely   affect  the  condition   (financial  or   otherwise),   assets,
     liabilities,  business,  operations or future prospects of ACNB or restrict
     in any  manner  the right of ACNB to  conduct  its  business  as  presently
     conducted;  and (iii) ACNB is not aware of any fact or condition  presently
     existing  that  might  give  rise  to  any  litigation,   investigation  or
     proceeding  which, if determined  adversely to ACNB,  would  materially and
     adversely   affect  the  condition   (financial  or   otherwise),   assets,
     liabilities, business, operations or future prospects of ACNB. For purposes
     of this  Section  3.2(h),  ACNB  shall be deemed to  include  Adams  County
     National Bank.

(i) Proxy Statement/Prospectus.
     ---------------------------

     At the time the Proxy  Statement/Prospectus  (as  defined in Section 5.1 of
     this Agreement) is mailed to the shareholders of Farmers Bancorp and at all
     times  subsequent to such mailing,  up to and including the Effective Date,
     the  Proxy  Statement/Prospectus  (including  any pre-  and  post-effective
     amendments  and  supplements  thereto),  with  respect  to all  information
     relating to ACNB,  ACNB North and Adams County  National Bank,  ACNB Common
     Stock,  and actions taken and statements made by ACNB, ACNB North and Adams
     County  National  Bank in  connection  with the  transactions  contemplated
     herein (other than information

                                       27

<PAGE>


     provided by Farmers  Bancorp to ACNB,  ACNB North and Adams County National
     Bank), will: (i) comply in all material respects with applicable provisions
     of the 1933 Act and the 1934 Act and the  pertinent  rules and  regulations
     thereunder;  and (ii) not contain any statement  which,  at the time and in
     light of the  circumstances  under which it is made, is false or misleading
     with respect to any material fact, or omits to state any material fact that
     is  necessary  to be stated  therein  in order  (A) to make the  statements
     therein  not false or  misleading,  or (B) to correct any  statement  in an
     earlier communication with respect to the Proxy  Statement/Prospectus which
     has become false or misleading.

(j) Year 2000 Compliance.
     ---------------------

     ACNB and Adams County National Bank are in compliance with all requirements
     announced or promulgated by the ACNB Regulatory Agencies and by the Federal
     Financial  Institutions  Examination  Council in connection  with Year 2000
     preparedness and compliance.

(k) CRA Compliance.
     ----------------

     Adams County  National Bank has received a satisfactory  compliance  rating
     and has received a satisfactory Community Reinvestment Act rating. ACNB has
     no  knowledge  of any facts or  circumstances  which would  prevent it from
     receiving such satisfactory ratings upon its next appropriate examination.

(l)  Environmental  Matters.
     -----------------------

     There is no activity or condition on or in any  property  owned,  occupied,
     leased or held as security by ACNB or Adams County National Bank that would
     subject  ACNB  or  Adams  County  National  Bank  to  damages,   penalties,
     injunctive  relief  or  cleanup  costs  under  any  Environmental  Law that
     individually  or in the aggregate  would have a Material  Adverse Effect on
     ACNB on a consolidated basis.

(m)  Allowance.
     ----------

     The  allowance  for loan and  lease  losses  shown on  ACNB's  consolidated
     statement  of  financial  condition  as of December  31, 1997 was,  and the
     allowance for loan and lease losses shown on ACNB's consolidated  statement
     of financial  condition for periods ending after the date of this Agreement
     will be, in the opinion of  management  of ACNB and Adams  County  National
     Bank, adequate, as of the date thereof, under generally accepted accounting
     principles   applicable  to  commercial  banks  and  all  other  applicable
     regulatory  requirements  for  all  losses  reasonably  anticipated  in the
     Ordinary  Course of Business as of the date  thereof  based on  information
     available as of such date.

SECTION 3.3 Representations and Warranties of ACNB North.

(a)  Organization.
     -------------

     ACNB North is a  corporation  duly  organized,  validly  existing  and duly
     subsisting under the laws of the  Commonwealth of Pennsylvania.  All of the
     outstanding shares of capital stock of ACNB North have been validly issued,
     are fully paid and  nonassessable  and are owned  directly by ACNB free and
     clear of any lien, charge or other encumbrance.

                                       28

<PAGE>

(b)  Authority.
     ---------

     ACNB  North  has the  corporate  power  and  authority  to enter  into this
     Agreement  and to  carry  out its  obligations  hereunder.  The  execution,
     delivery  and   performance  of  this  Agreement  by  ACNB  North  and  the
     consummation  of the  transactions  described  herein  have  been  duly and
     validly  authorized by all necessary  corporate actions  (including without
     limitation  shareholder  action)  in  respect  thereof  on the part of ACNB
     North.  This  Agreement  is a valid and binding  obligation  of ACNB North,
     enforceable  against ACNB North in accordance with its terms, except to the
     extent  enforcement is limited by bankruptcy,  insolvency and other similar
     laws affecting creditor's rights or general principles of equity.

(c)  Capitalization.
     ---------------

     The  authorized  capital  stock  of  ACNB  North  consists  of ten  million
     (10,000,000) shares of common stock, par value $1.00 per share ("ACNB North
     Common Stock"). All outstanding shares of ACNB North Common Stock have been
     duly issued and are validly  outstanding,  fully paid and nonassessable and
     are owned by ACNB as sole shareholder.

(d)  Approval.
     --------

     ACNB will,  as the sole  shareholder  of ACNB North,  vote to approve  this
     Agreement and the Merger.


                                   ARTICLE IV
                COVENANTS OF FARMERS BANCORP AND FARMERS NATIONAL

SECTION 4.1 Conduct of Business.

     Except as otherwise consented to by ACNB and ACNB North in writing, Farmers
Bancorp and Farmers National shall each:

(a)  use all  reasonable  efforts to carry on its  business in, and only in, the
     ordinary course of business consistent with customary business practices of
     prudently  managed banks  (hereinafter  referred to as "Ordinary  Course of
     Business").

(b)  to the extent consistent with prudent business judgment, use all reasonable
     efforts  to  preserve  its  present  business  organization,  to retain the
     services  of  its  present   officers  and  employees,   to  maintain  good
     relationships  with its employees,  and to maintain its relationships  with
     customers,  suppliers  and others  having  business  dealings  with Farmers
     Bancorp or Farmers National;

(c)  maintain  all of  Farmers  Bancorp's  and  Farmers  National's  structures,
     equipment  and other real property and tangible  personal  property in good
     repair,  order and condition,  except for ordinary wear and tear and damage
     by unavoidable casualty;

(d)  use all reasonable  efforts to preserve or collect all material  claims and
     causes of action belonging to Farmers Bancorp and Farmers National;


                                       29

<PAGE>


(e)  keep in full force and effect all insurance policies now carried by Farmers
     Bancorp and Farmers National;

(f)  perform in all  material  respects  each of Farmers  Bancorp's  and Farmers
     National's   obligations   under  all   material   agreements,   contracts,
     instruments  and other  commitments  to which  Farmers  Bancorp  or Farmers
     National is a party or by which Farmers Bancorp or Farmers  National may be
     bound or which relate to or affect its properties, assets and business;

(g)  maintain its books of account and other  records in the Ordinary  Course of
     Business;

(h)  comply in all material respects with all statutes, laws, ordinances,  rules
     and regulations, decrees, orders, consent agreements,  examination reports,
     memoranda of  understanding  and other federal,  state,  county,  local and
     municipal governmental directives applicable to Farmers Bancorp and Farmers
     National and to the conduct of its business;

(i)  not amend Farmers Bancorp's or Farmers National's Articles of Incorporation
     or Bylaws;

(j)  not  enter  into or  assume  any  material  contract,  incur  any  material
     liability or obligation,  make any material commitment,  acquire or dispose
     of any  property  or asset or engage in any  transaction  or subject any of
     Farmers  Bancorp's  or  Farmers  National's  properties  or  assets  to any
     material lien, claim, charge, or encumbrance of any kind whatsoever;

(k)  not take or permit to be taken any action  which would  constitute a breach
     of any representation, warranty or covenant set forth in this Agreement;

(l)  not declare,  set aside or pay any dividend or make any other  distribution
     in respect of Farmers Bancorp and Farmers National Common Stock,  except as
     provided in Section 4.9 of this Article IV;

(m)  not  authorize,  purchase,  issue  or sell  (or  authorize,  issue or grant
     options,  warrants  or rights to  purchase  or sell) any  shares of Farmers
     Bancorp  Common  Stock or any other  equity or debt  securities  of Farmers
     Bancorp or any securities convertible into Farmers Bancorp Common Stock;

(n)  not  increase  the  rate  of  compensation  of,  pay a bonus  or  severance
     compensation  to,  or  enter  into  any  employment,   severance,  deferred
     compensation  or other  agreement with any officer,  director,  employee or
     consultant  of Farmers  Bancorp or Farmers  National,  except that  Farmers
     Bancorp  or  Farmers   National  may  grant  general  salary  increases  to
     individual  employees in the ordinary  course of business  consistent  with
     past practice.


                                       30

<PAGE>

(o)  not enter into any related party  transaction of the kind  contemplated  in
     Section  3.1(k) of this  Agreement  except such related party  transactions
     relating to  extensions of credit made in  accordance  with all  applicable
     laws,  regulations  and rules and in the  Ordinary  Course of  Business  on
     substantially the same terms,  including interest rates and collateral,  as
     those prevailing at the time for comparable arm's length  transactions with
     other   persons   that  do  not  involve  more  than  the  normal  risk  of
     collectability or present other  unfavorable  features and after disclosure
     of such to ACNB;

(p)  not  change  the  presently  outstanding  number of  shares  or effect  any
     capitalization,  reclassification,  stock  dividends,  stock  split or like
     change in capitalization;

(q)  not enter  into or  substantially  modify  (except  as may be  required  by
     applicable law) any pension, retirement, stock option, stock warrant, stock
     purchase,  stock  appreciation  right,  savings,  profit sharing,  deferred
     compensation,  severance,  consulting,  bonus,  group  insurance  or  other
     employee benefit, incentive or welfare contract, or plan or arrangement, or
     any trust agreement  related  thereto,  in respect to any of its directors,
     officers, or other employees;

(r)  not merge with or into,  or  consolidate  with, or be purchased or acquired
     by, any other  corporation,  financial  institution,  entity, or person (or
     agree  to  any  such  merger,  consolidation,   affiliation,   purchase  or
     acquisition)  or  permit  (or  agree  to  permit)  any  other  corporation,
     financial institution, entity or person to be merged with it or consolidate
     or affiliate with any other corporation,  financial institution,  entity or
     person;  acquire  control  over  any  other  firm,  financial  institution,
     corporation or organization or create any subsidiary;  acquire,  liquidate,
     sell or dispose  (or agree to acquire,  liquidate,  sell or dispose) of any
     assets other than in the Ordinary  Course of Business and  consistent  with
     prior practice;

(s)  not solicit or encourage  inquiries or proposals  with respect to,  furnish
     any  information  relating  to,  or  participate  in  any  negotiations  or
     discussions  concerning any acquisition or purchase of all or a substantial
     equity  interest  or  portion  of the  assets in or of  Farmers  Bancorp or
     Farmers  National  or any  business  combination  with  Farmers  Bancorp or
     Farmers National other than as contemplated by this Agreement, or authorize
     or permit any officer,  director, agent or affiliate of it to do any of the
     above;  or fail  to  notify  ACNB  immediately  if any  such  inquiries  or
     proposals are received by, any such  information is requested  from, or any
     such  negotiations  are  sought to be  initiated  with  Farmers  Bancorp or
     Farmers National;

(t)  not change any method, practice or principle of accounting except as may be
     required by generally  accepted  accounting  principles  or any  applicable
     regulation  or take any action  that  would  preclude  satisfaction  of the
     condition  to closing  contained  in Section  6.2(d)  relating to financial
     accounting treatment of the Merger;

                                       31

<PAGE>


(u)  not make any loan or other credit facility commitment in excess of $100,000
     (including  without  limitation,  lines of credit and letters of credit) to
     any affiliate or compromise,  expand,  renew or modify any such outstanding
     commitment;

(v)  not enter into any swap or similar  commitment,  agreement  or  arrangement
     which is not consistent  with past practice and which  increases the credit
     or interest rate risk over the levels existing at December 31, 1997;

(w)  not  enter  into  any  derivative,  cap or  floor  or  similar  commitment,
     agreement or  arrangement,  except in the  Ordinary  Course of Business and
     consistent with past practices;

(x)  not enter into any participation arrangements or approvals of extensions of
     credit in excess of  $250,000  or renew,  expand or modify any  outstanding
     participation arrangements or approvals;

(y)  not take any action  which would result in any of the  representations  and
     warranties  of  Farmers  Bancorp  or  Farmers  National  set  forth in this
     Agreement becoming untrue as of any date after the date hereof;

(z)  not sell,  exchange or otherwise  dispose of any  investment  securities or
     loans that are held for sale,  prior to  scheduled  maturity and other than
     pursuant to policies agreed upon from time to time by the parties;

     (aa) not purchase any security for its  investment  portfolio not rated "A"
          or higher by either Standard & Poor's  Corporation or Moody's Investor
          Services, Inc.;

     (bb) not waive, release, grant or transfer any rights of value or modify or
          change in any material respect any existing agreement to which Farmers
          Bancorp or Farmers  National  is a party,  other than in the  Ordinary
          Course of Business consistent with past practice;

     (cc) not  knowingly  take  any  action  that  would,   under  any  statute,
          regulation  or  administrative  practice  of  any  regulatory  agency,
          materially  or  adversely  affect  the  ability  of any  party to this
          Agreement to obtain any required  approvals  for  consummation  of the
          transaction; and

     (dd) not agree to any of the foregoing items (i) through (cc).


SECTION 4.2 Best Efforts.

     Farmers  Bancorp and Farmers  National  shall  cooperate with ACNB and ACNB
North and each  shall use its best  efforts to do or cause to be done all things
necessary  or  appropriate  on its  part in  order  to  fulfill  the  conditions
precedent set forth in Article VI of this Agreement and to

                                       32

<PAGE>

consummate this Agreement. In particular, without limiting the generality of the
foregoing sentence, Farmers Bancorp and Farmers National shall:

(a)  cooperate  with  ACNB and ACNB  North in the  preparation  of all  required
     applications for regulatory  approval of the  transactions  contemplated by
     this  Agreement and in the  preparation of the  Registration  Statement (as
     defined in Section 5.1(b) of this Agreement);

(b)  call a special or annual  meeting  of its  shareholders  and take,  in good
     faith,  all actions which are necessary or appropriate on its part in order
     to secure the approval and adoption of this  Agreement by its  shareholders
     at that meeting,  including  recommending the approval of such agreement by
     the shareholders of Farmers Bancorp and Farmers National;

(c)  suspend any dividend  reinvestment and/or stock repurchase plan, as soon as
     practicable; and

(d)  modify the Articles of  Incorporation  or Bylaws or any other  documents of
     Farmers Bancorp or Farmers National reasonably  requested by ACNB necessary
     to effectuate the transactions contemplated hereby.

SECTION 4.3 Access to Properties and Records.

     Farmers  Bancorp and Farmers  National  shall give to ACNB,  ACNB North and
their authorized  representatives  (including  without limitation their counsel,
accountants,   economic  and  environmental  consultants  and  other  designated
representatives)   reasonable   access  during  normal  business  hours  to  all
properties,  books,  contracts,  documents  and  records of  Farmers  Bancorp or
Farmers  National as ACNB or ACNB North may reasonably  request,  subject to the
obligations of ACNB, ACNB North and their authorized representatives to maintain
the confidentiality of all non-public  information concerning Farmers Bancorp or
Farmers National obtained by reason of such access.

SECTION 4.4  Subsequent Financial Statements.

     Between the date of execution of this  Agreement  and the  Effective  Date,
Farmers  Bancorp  shall  promptly  prepare and deliver to ACNB and ACNB North as
soon as practicable  all internal  monthly and quarterly  financial  statements,
reports to shareholders and reports to regulatory authorities prepared by or for
Farmers  Bancorp,  including all audit reports  submitted to Farmers  Bancorp by
independent auditors in connection with each annual, interim or special audit of
the books of Farmers Bancorp made by such  accountants.  In particular,  without
limiting the generality of the foregoing sentence, Farmers Bancorp shall deliver
to ACNB and ACNB  North as soon as  practicable  a balance  sheet as of June 30,
1998 and a related  statement of income for the six (6) months then ended (which
financial statements are hereinafter referred to as the "June 30, 1998 Financial
Statements"). The representations and warranties set forth in Section 3.1(hh) of
this Agreement shall apply to the June 30, 1998 Financial Statements.

                                       33

<PAGE>

SECTION 4.5 Board and Committee Minutes.

     Farmers Bancorp and Farmers National shall provide to ACNB,  within 15 days
after any meeting of the Board of Directors,  or any committee  thereof,  or any
senior or executive management committee, a copy of the minutes of such meeting.

SECTION 4.6 Update Schedule.

     Farmers  Bancorp and Farmers  National shall promptly  disclose to ACNB and
ACNB North in writing any change,  addition,  deletion or other  modification to
the information set forth in the Annexes to this Agreement.  Notwithstanding the
foregoing,  disclosures  made subsequent to the date of this Agreement shall not
relieve  Farmers  Bancorp or Farmers  National from any and all  liabilities for
prior statements and disclosures to ACNB and ACNB North.

SECTION 4.7  Notice.

     Farmers  Bancorp and Farmers  National shall promptly  notify ACNB and ACNB
North in writing of any actions,  claims,  investigations,  proceedings or other
developments  which,  if pending or in existence on the date of this  Agreement,
would  have been  required  to be  disclosed  to ACNB and ACNB North in order to
ensure the  accuracy of the  representations  and  warranties  set forth in this
Agreement or which otherwise could materially and adversely affect the condition
(financial or otherwise),  assets,  liabilities,  business  operations or future
prospects of Farmers Bancorp or Farmers National.

SECTION 4.8 Other Proposals.

     Farmers  Bancorp and Farmers  National  shall not, nor shall either of them
permit any officer,  director,  employee,  agent,  consultant,  counsel or other
representative  to,  directly or  indirectly,  solicit,  encourage,  initiate or
engage  in  discussions  or  negotiations  with,  or  respond  to  requests  for
information,  inquiries or other communications from any persons other than ACNB
or ACNB  North  concerning  the fact of, or the terms and  conditions  of,  this
Agreement, or concerning any acquisition of Farmers Bancorp or Farmers National,
or any assets or business  thereof  (except  that Farmers  Bancorp  officers may
respond to  inquiries  from  analysts,  regulatory  authorities  and  holders of
Farmers  Bancorp Common Stock in the Ordinary  Course of Business);  and Farmers
Bancorp shall notify ACNB  immediately if any such  discussions or  negotiations
are sought to be initiated  with  Farmers  Bancorp by any such person other than
ACNB  or  if  any  such  requests  for  information,   inquiries,  proposals  or
communications are received from any person other than ACNB.

SECTION 4.9  Dividends.

     Between the date of this Agreement and the Effective Date,  Farmers Bancorp
shall only declare and pay cash dividends as provided  herein.  Farmers  Bancorp
shall only pay regular  quarterly  cash  dividends in an amount not in excess of
$.17 per share during each of the third and fourth calendar quarters of 1998.


                                       34

<PAGE>

SECTION 4.10 Core Deposits.

     Farmers  National  shall use  commercially  reasonable  efforts to maintain
deposits.

SECTION 4.11 Affiliate Letters.

     Farmers  Bancorp  shall  deliver or cause to be  delivered  to ACNB or ACNB
North,  at or  before  the  Closing  (as  defined  in  Section  1.1(b)  of  this
Agreement), a letter or agreement from each officer, director and shareholder of
Farmers  Bancorp who may be deemed to be an "affiliate" (as that term is defined
for purposes of Rules 145 and 405  promulgated by the SEC under the 1933 Act) of
Farmers  Bancorp,  in form and  substance  satisfactory  to ACNB and ACNB North,
under the terms of which each such officer, director or shareholder acknowledges
and agrees to abide by all limitations imposed by the 1933 Act and by all rules,
regulations  and  releases  promulgated  thereunder  with respect to the sale or
other  disposition  of the shares of ACNB  Common  Stock to be  received by such
person pursuant to this Agreement.

SECTION      4.12 No  Purchases  or  Sales of ACNB  Common  Stock  During  Price
             Determination Period.

     Neither  Farmers  Bancorp,  Farmers  National nor any executive  officer or
director of Farmers  Bancorp or Farmers  National nor any shareholder of Farmers
Bancorp  who may be deemed to be an  "affiliate"  (as that term is  defined  for
purposes  of Rules  145 and 405  promulgated  by the SEC  under the 1933 Act) of
Farmers  Bancorp shall purchase or sell, or submit a bid to purchase or an offer
to sell, directly or indirectly, any shares of ACNB Common Stock or any options,
rights or other  securities  convertible into shares of ACNB Common Stock during
the Price Determination Period.

SECTION 4.13 Accounting Treatment.

     Farmers  Bancorp  acknowledges  that ACNB  presently  intends  to treat the
business combination  contemplated by this Agreement as a "pooling of interests"
for financial reporting  purposes.  Neither Farmers Bancorp nor Farmers National
shall take (and shall use its best  efforts not to permit any of its  directors,
officers, employees,  shareholders, agents, consultants or other representatives
to take) any action  which  would  preclude  ACNB from  treating  such  business
combination as a "pooling of interests" for financial reporting purposes.

SECTION 4.14 Press Releases.

     Neither Farmers Bancorp nor Farmers  National shall issue any press release
related to this Agreement or the  transactions  contemplated  hereby as to which
ACNB has not given its prior written consent,  and shall consult with ACNB as to
the form and substance of other public  disclosures  related thereto;  provided,
however, that nothing contained herein shall prohibit Farmers Bancorp or Farmers
National  from  making  any  disclosure   which  its  counsel  deems  reasonably
necessary.


                                       35

<PAGE>


SECTION 4.15 Phase I Environmental Audit.

     Farmers Bancorp and Farmers National shall permit,  if ACNB elects to do so
at its own  expense,  a "phase I  environmental  audit" to be  performed  at any
physical  location  owned or occupied  on the date hereof by Farmers  Bancorp or
Farmers National.


                                    ARTICLE V
                        COVENANTS OF ACNB AND ACNB NORTH

     From the date of this  Agreement  until the  Effective  Date (as defined in
Section 1.1(c) of this Agreement),  ACNB and ACNB North covenant and agree to do
the following:

SECTION 5.1 Best Efforts.

     ACNB and ACNB North  shall  cooperate  with  Farmers  Bancorp  and  Farmers
National  and shall use their best  efforts to do or cause to be done all things
necessary  or  appropriate  on their  part in order to  fulfill  the  conditions
precedent  set forth in  Article VI of this  Agreement  and to  consummate  this
Agreement.  In  particular,  without  limiting the  generality  of the foregoing
sentence, ACNB and ACNB North agree to do the following:

(a)  Applications  for Regulatory  Approval.

     ACNB and ACNB North shall promptly  prepare and file,  with the cooperation
     and  assistance  of Farmers  Bancorp and  Farmers  National,  all  required
     applications for regulatory  approval of the  transactions  contemplated by
     this Agreement.

(b)  Registration  Statement.

     ACNB shall promptly prepare, with the cooperation and assistance of Farmers
     Bancorp, and file with the SEC, a registration statement under the 1933 Act
     (the "Registration Statement") for the purpose of registering the shares of
     ACNB Common Stock to be issued under the provisions of this Agreement. ACNB
     may rely upon all  information  provided  to it by Farmers  Bancorp in this
     connection  and ACNB  shall not be liable  for any  untrue  statement  of a
     material fact or any omission to state a material fact in the  Registration
     Statement  or  in  the  proxy   statement   and   prospectus   (the  "Proxy
     Statement/Prospectus")  which  is  prepared  as a  part  thereof,  if  such
     statement is made by ACNB in reliance upon any information provided to ACNB
     by Farmers Bancorp or by its agents and  representatives.  ACNB will advise
     Farmers  Bancorp,  after it receives notice  thereof,  of the time when the
     Registration Statement or any Pre- or Post-Effective  Amendment thereto has
     become effective or any supplement or amendment has been filed.

(c)  State Securities Laws.

     ACNB and ACNB North,  with the  cooperation of Farmers  Bancorp and Farmers
     National,  shall  promptly  take all such  actions as may be  necessary  or
     appropriate in order to comply with all applicable  securities  laws of any
     state  having  jurisdiction  over  the  transactions  contemplated  by this
     Agreement.


                                       36

<PAGE>


SECTION 5.2 Access to Properties and Records.

     ACNB and ACNB North shall give to Farmers Bancorp and Farmers  National and
to  its  authorized   representatives  (including  without  limitation  counsel,
accountants,   economic  and  environmental  consultants  and  other  designated
representatives)   reasonable   access  during  normal  business  hours  to  all
properties,  books,  contracts,  documents  and records of ACNB,  ACNB North and
Adams County  National  Bank as they may  reasonably  request,  subject to their
obligation and the obligation of their  authorized  representatives  to maintain
the confidentiality of all non-public information concerning ACNB, ACNB North or
Adams County National Bank obtained by reason of such access.

SECTION 5.3  Subsequent Financial Statements.

     Between the date of execution of this  Agreement  and the  Effective  Date,
ACNB  shall  promptly  prepare  and  deliver  to  Farmers  Bancorp  as  soon  as
practicable each Quarterly  Report to ACNB's  shareholders and any Annual Report
to ACNB's  shareholders  normally  prepared  by ACNB.  The  representations  and
warranties  set  forth in  Sections  3.2 of this  Agreement  shall  apply to the
financial statements set forth in the foregoing Quarterly Reports and any Annual
Report to ACNB's shareholders.

SECTION 5.4 Update Schedule.

     ACNB and ACNB North shall promptly  disclose to Farmers Bancorp and Farmers
National in writing any change, addition,  deletion or other modification to the
information set forth in its Annexes to this Agreement.

SECTION 5.5  Notice.

     ACNB and ACNB North  shall  promptly  notify  Farmers  Bancorp  and Farmers
National in writing of any actions, claims, investigations or other developments
which, if pending or in existence on the date of this Agreement, would have been
required  to be  disclosed  to them in  order  to  ensure  the  accuracy  of the
representations  and warranties  set forth in this Agreement or which  otherwise
could  materially and adversely  affect the condition  (financial or otherwise),
assets, liabilities,  business,  operations or future prospects of ACNB and ACNB
North.

SECTION     5.6  No  Purchase  or  Sale  of  ACNB  Common   Stock  During  Price
            Determination Period.

     Neither  ACNB nor any  subsidiary  of ACNB,  nor any  executive  officer or
director of ACNB or any subsidiary of ACNB, nor any  shareholder of ACNB who may
be deemed to be an  "affiliate"  (as that term is defined for  purposes of Rules
145 and 405  promulgated by the SEC under the 1933 Act) of ACNB,  shall purchase
or  sell,  or  submit  a bid to  purchase  or an  offer  to  sell,  directly  or
indirectly,  any shares of ACNB  Common  Stock or any  options,  rights or other
securities  convertible  into  shares  of ACNB  Common  Stock  during  the Price
Determination Period;  provided,  however, that ACNB may purchase shares of ACNB
Common Stock in the Ordinary Course of Business during

                                       37

<PAGE>


the Price Determination  Period pursuant to ACNB's employee benefit plans, stock
option plans or ACNB's dividend reinvestment and stock purchase plan.

SECTION 5.7 Publicity.

     ACNB shall provide to Farmers  Bancorp,  for review and comment,  copies of
any  public  disclosure  or press  releases  related to this  Agreement  and the
transactions   contemplated   hereby,  prior  to  any  public  release  of  such
disclosure.

SECTION 5.8 Indemnification.

     On and after the Effective Time, ACNB shall indemnify and hold harmless all
former and present directors,  officers, employees and agents of Farmers Bancorp
and  Farmers  National  for  all  losses,  claims,   damages,  costs,  expenses,
liabilities  or  judgments  or  amounts  that are paid in  settlement  (with the
approval  of  ACNB,  which  approval  shall  not be  unreasonably  withheld)  in
connection with any claim,  action,  suit,  proceeding or investigation based in
whole or in part on the operation of the business of Farmers  Bancorp or Farmers
National prior to the Effective Time, to the fullest extent  permitted under the
articles of incorporation of Farmers Bancorp,  the charter of Farmers  National,
and the  bylaws of each,  as in effect as of the date of the  execution  of this
Agreement.


                                   ARTICLE VI
                           CONDITIONS TO CONSUMMATION

SECTION 6.1 Common Conditions.

     The  respective  obligations  of the parties to effect the Merger  shall be
subject  to the  satisfaction  or  waiver  prior  to the  Effective  Time of the
following conditions:

(a)  The  Agreement  and the  transactions  contemplated  hereby shall have been
     approved by the requisite vote of the  shareholders  of Farmers Bancorp and
     ACNB (if applicable) in accordance with applicable law.

(b)  All approvals,  consents or waivers  required by any of the Farmers Bancorp
     Regulatory  Agencies or the ACNB  Regulatory  Agencies with respect to this
     Agreement  (including the Merger) and the transactions  contemplated hereby
     including,  without  limitation,  the  approvals,  notices to,  consents or
     waivers of (i) the Board, and (ii) the  Pennsylvania  Department of Banking
     (the Farmers Bancorp Regulatory Agencies and the ACNB Regulatory  Agencies,
     are,  collectively the "Regulatory  Agencies") shall have been obtained and
     shall remain in full force and effect, and all applicable statutory waiting
     periods  (including  without  limitation all applicable  statutory  waiting
     periods  relating to the Merger) shall have expired;  and the parties shall
     have  procured  all other  regulatory  approvals,  consents  or  waivers of
     governmental authorities or other persons that are necessary or appropriate
     to the

                                       38

<PAGE>


     consummation  of the  transactions  contemplated  by this Agreement  except
     those  approvals,  consents or waivers,  if any, of which failure to obtain
     would not, individually or in the aggregate, have a Material Adverse Effect
     on ACNB,  ACNB North,  Farmers  Bancorp or Farmers  National  (after giving
     effect to the transaction contemplated hereby); provided,  however, that no
     such approval shall have imposed any condition or requirement  which in the
     opinion  of  the  board  of  directors  of  ACNB  or  ACNB  North   renders
     consummation of the Merger inadvisable.

(c)  All  other  requirements  prescribed  by law  which  are  necessary  to the
     consummation of the transactions  contemplated by this Agreement shall have
     been satisfied.

(d)  No party hereto shall be subject to any order,  decree or  injunction  of a
     court or agency of competent  jurisdiction  which  enjoins or prohibits the
     consummation  of the Merger or any other  transaction  contemplated by this
     Agreement,  and no litigation or proceeding shall be pending against any of
     the parties herein or any of their subsidiaries brought by any governmental
     agency seeking to prevent  consummation  of the  transactions  contemplated
     hereby.

(e)  No statute, rule, regulation,  order,  injunction or decree shall have been
     enacted,  entered,  promulgated or enforced by any  governmental  authority
     which prohibits,  restricts or makes illegal  consummation of the Merger or
     any other transaction contemplated by this Agreement.

(f)  The  Registration  Statement  shall  have been  filed (the date of which is
     referred  to  herein as the  "Filing  Date") by ACNB with the SEC under the
     1933 Act,  and shall  have been  declared  effective  prior to the time the
     Proxy Statement/  Prospectus is first mailed to the shareholders of Farmers
     Bancorp,  and no  stop  order  with  respect  to the  effectiveness  of the
     Registration  Statement shall have been issued; the ACNB Common Stock to be
     issued  pursuant to this  Agreement  shall be duly  registered or qualified
     under the  securities or "blue sky" laws of all states in which such action
     is required  for  purposes  of the initial  issuance of such shares and the
     distribution  thereof to the  shareholders of Farmers  Bancorp  entitled to
     receive such shares.

(g)  A ruling from the IRS or an opinion of Shumaker Williams,  P.C., or from an
     accounting firm acceptable to ACNB to the effect that:

     (i)  The Merger  will  constitute  a  reorganization  within the meaning of
          Section  368(a) of the Code and Farmers  Bancorp,  ACNB and ACNB North
          will each be a "party  to a  reorganization"  within  the  meaning  of
          Section 368(b) of the Code;

     (ii) No gain or loss will be  recognized by Farmers  Bancorp,  ACNB or ACNB
          North by reason of the Merger;


                                       39

<PAGE>


     (iii)Except  for  cash  received  in lieu of  fractional  shares  and  cash
          received  by  Farmers   Bancorp   Shareholders   who  exercise   their
          dissenter's  rights,  no  gain  or  loss  will  be  recognized  by the
          shareholders  of Farmers  Bancorp who receive solely ACNB Common Stock
          upon the exchange of their shares of Farmers  Bancorp Common Stock for
          shares of ACNB Common Stock;

     (iv) The tax basis of the ACNB  Common  Stock to be received by the Farmers
          Bancorp shareholders will be, in each instance,  the same as the basis
          of the Farmers Bancorp Common Stock surrendered in exchange therefor;

     (v)  The  holding  period of the ACNB  Common  Stock  received by a Farmers
          Bancorp  shareholder  receiving  ACNB  Common  Stock will  include the
          period during which the Farmers  Bancorp  Common Stock  surrendered in
          exchange therefor was held;

     (vi) Cash received by a Farmers Bancorp shareholder in lieu of a fractional
          share  interest of ACNB Common Stock or upon  exercise of  dissenter's
          rights will be treated as having been  received as a  distribution  in
          full payment in exchange  for the  fractional  share  interest of ACNB
          Common Stock, or the tax basis in the shares surrendered,  as the case
          may be,  which he would  otherwise  be  entitled  to receive  and will
          qualify as capital gain or loss; and

     (vii)Subject to any  limitations  imposed under Sections 381 and 382 of the
          Code, ACNB North,  as the survivor to the Merger,  will carry-over and
          take into account all  accounting  items and tax attributes of Farmers
          Bancorp,  including but not limited to earning and profits, methods of
          accounting, and tax basis and holding periods of Farmers Bancorp.

          In case a ruling  from the IRS is  sought,  Farmers  Bancorp  and ACNB
          shall  cooperate  and each  shall  furnish to the other and to the IRS
          such  information  and  representations  as shall,  in the  opinion of
          counsel for ACNB and Farmers  Bancorp,  be  necessary  or advisable to
          obtain such ruling.

SECTION 6.2 Conditions to Obligations of ACNB and ACNB North.

     The  obligations  of ACNB and ACNB  North to  effect  the  Merger  shall be
subject  to the  satisfaction  or  waiver  prior  to the  Effective  Time of the
following additional conditions:

(a)  Each of the  representations  and warranties of Farmers Bancorp and Farmers
     National  contained  in this  Agreement  shall be true and  correct  in all
     material  respects as of the Effective  Date as if made on such date (or on
     the date  when made in the case of any  representation  or  warranty  which
     specifically  relates to an earlier  date);  each of  Farmers  Bancorp  and
     Farmers  National shall have performed each of its covenants and agreements
     contained in this  Agreement;  and ACNB and ACNB North shall have  received
     certificates signed by the President and the Cashier of Farmers

                                       40

<PAGE>

     National and the President and  Secretary of Farmers  Bancorp,  dated as of
     the date of the Closing, to the foregoing effect.

(b)  Greenawalt & Company, or such other accounting firm as is acceptable to the
     parties,  shall have furnished to ACNB an "agreed upon procedures"  letter,
     dated the Effective Date, in form and substance satisfactory to ACNB to the
     effect that, based upon a procedure performed with respect to the financial
     condition of Farmers  Bancorp,  Farmers  National and  affiliates,  for the
     period from  December  31, 1997 to a specified  date not more than five (5)
     days prior to the date of such  letter,  including  but not  limited to (a)
     their inspection of the minute books of Farmers  Bancorp,  Farmers National
     and affiliates,  (b) inquiries made by them of officers and other employees
     of  Farmers  Bancorp,  Farmers  National  and  affiliates  responsible  for
     financial and accounting  matters as to transaction,  and events during the
     period,  as to consistency of accounting  procedures with prior periods and
     as to the existence and disclosure of any material contingent  liabilities,
     and (c) of other  specified  procedures  and  inquiries  performed by them,
     nothing has come to their attention that would indicate that (A) during the
     period from  December  31, 1997 to a specified  date not more than five (5)
     days  prior  to the  date of such  letter,  there  was  any  change  in the
     capitalization  of Farmers  Bancorp or Farmers  National on a  consolidated
     basis,  or (B) any  material  adjustments  would be required to the audited
     financial  statements  for the period ended  December 31, 1997 in order for
     them to be in conformity  with  generally  accepted  accounting  principles
     applied on a consistent basis with that of prior periods.

(c)  There  shall  not have  occurred  any  change in the  financial  condition,
     properties,  assets, business or results of operation of Farmers Bancorp or
     Farmers National which,  individually or in the aggregate, has had or might
     reasonably  be expected to result in a Material  Adverse  Effect on Farmers
     Bancorp or Farmers National.

(d)  The Merger  shall as of the date of the Closing meet the  requirements  for
     pooling-of-interests   accounting   treatment  under   generally   accepted
     accounting  principles and under the accounting  rules of the SEC, and ACNB
     shall  have  received  a  letter  from  Stambaugh-Ness,  P.C.  in form  and
     substance  reasonably  satisfactory to ACNB as to the matters  specified in
     Section 6.2 (d).

(e)  ACNB shall have  received  from each of the persons  identified  by Farmers
     Bancorp  pursuant  to Section  4.11 hereof an  executed  counterpart  of an
     affiliate's agreement in the form contemplated by such Section.

(f)  Except as  otherwise  provided in this  Agreement,  prior to  Closing,  all
     issued and  outstanding  options,  warrants  or rights to  acquire  Farmers
     Bancorp  Common Stock or any capital  stock of Farmers  National  ("Farmers
     National Common Stock") shall have been canceled.  No compensation or other
     rights will be payable or exchangeable in the Merger in respect of any such
     rights which remain unexercised at the Effective Time.

                                       41

<PAGE>


(g)  Dissenting  Shareholders.  Holders of no more than seven percent  (7.0%) of
     the issued and outstanding  shares of Farmers Bancorp (17,360 shares) shall
     have exercised their statutory appraisal or Dissenters' Rights.

(h)  Environmental Matters. No environmental problem of the kind contemplated in
     Section  3.1(q)  of  Article  III of  this  Agreement  and  not  previously
     disclosed on Annex 3.1(q) shall have been discovered  which would, or which
     potentially could, materially and adversely affect the condition (financial
     or  otherwise),   assets,  liabilities,   business,  operations  or  future
     prospects  of  Farmers  Bancorp  or Farmers  National;  provided,  that for
     purposes of determining  the  materiality  of an undisclosed  environmental
     problem or problems,  the definition of "material" shall be governed by the
     proviso  to  Section  9.1 of this  Agreement.  The  result of any  "phase I
     environmental  audit"  conducted  pursuant to Section  4.15 with respect to
     owned or occupied bank premises shall be reasonably satisfactory to ACNB.

(i)  Benefit  Plans.  ACNB shall have  determined  within sixty (60) days of the
     execution  of this  Agreement  that the  medical,  health,  insurance,  and
     employee  benefit  plans or  programs  of Farmers  Bancorp  and/or  Farmers
     National do not contain any  provision or term which,  upon  assumption  by
     ACNB on the Effective Date, would require ACNB to provide benefits or incur
     cost in  excess  of those  provided  or paid by ACNB to or on behalf of its
     existing employees.

(j)  Financial  Confirmation.  Within  sixty (60) days of the  execution of this
     Agreement, ACNB (and their accountants if the advice of such accountants is
     deemed  necessary  or desirable  by ACNB) shall have  established  to their
     satisfaction  that Farmers  Bancorp's  Balance  Sheet  fairly  presents the
     financial  condition,  assets and liabilities of Farmers Bancorp as at June
     30, 1998, and that, since June 30, 1998 there has not been any material and
     adverse  change  in  the  condition   (financial  or  otherwise),   assets,
     liabilities, business, operations or future prospects of Farmers Bancorp or
     Farmers National.

(k)  Litigation.  All  litigation  pending  against  Farmers  Bancorp or Farmers
     National  which,  individually  or in the aggregate,  would have a Material
     Adverse  Effect on  Farmers  Bancorp's  consolidated  operations  or future
     prospects,   shall  have  been  settled  or  otherwise  resolved  on  terms
     satisfactory to ACNB.

SECTION       6.3 Conditions to the  Obligations of Farmers  Bancorp and Farmers
              National.

     The obligations of Farmers Bancorp to effect the Merger shall be subject to
the  satisfaction  or  waiver  prior  to the  Effective  Time  of the  following
additional conditions:

(a)  Each of the  representations,  warranties  and  covenants  of ACNB and ACNB
     North contained in this Agreement shall be true and correct in all material
     respects on the Effective Date as if made on such date (or on the date when
     made in the  case of any  representation  or  warranty  which  specifically
     relates to an earlier date); ACNB and

                                       42

<PAGE>

     ACNB North shall have performed each of its covenants and agreements, which
     are material to its operations and prospects,  contained in this Agreement;
     and  Farmers  Bancorp  shall  have  received  certificates  signed  by  the
     President  and Secretary or Vice  President or Assistant  Secretary of ACNB
     and ACNB North.

(b)  There  shall  not have  occurred  any  change in the  financial  condition,
     properties,  assets or  business or results of  operation  of ACNB and ACNB
     North which,  individually or in the aggregate, has had or might reasonably
     be expected to result in a Material  Adverse Effect on ACNB or the Material
     Subsidiaries taken as a whole.

(c)  The status of all pending  litigation that might  reasonably be expected to
     result in a Materially Adverse Effect to ACNB or the Material  Subsidiaries
     taken as a whole, shall be satisfactory to Farmers Bancorp.

(d)  Farmers  Bancorp  shall have  received  an  updated  opinion  from  Garland
     McPherson  &  Associates,  Inc.  as of a date no later than the date of the
     Proxy  Statement/Prospectus  mailed to the Farmers Bancorp  shareholders in
     connection with the Merger to the effect that the Merger  consideration  is
     fair to Farmers Bancorp's shareholders from a financial point of view.

(e)  A certificate for the required number of whole shares of ACNB Common Stock,
     as determined in accordance with Section  2.1(a),  and cash payable for the
     fractional  shares  interests  shall have been  delivered  to the  Exchange
     Agent, subject to Section 2.2 of this Agreement.


                                   ARTICLE VII
                                   TERMINATION

SECTION 7.1  Termination.

     This Agreement may be terminated,  and the Merger  abandoned,  prior to the
Effective  Date,  either  before or after its  approval by the  shareholders  of
Farmers Bancorp:

(a)  by the mutual,  written consent of Farmers Bancorp and ACNB if the board of
     directors of each so  determines  by a vote of a majority of the members of
     the entire Board;

(b)  by Farmers  Bancorp if (i) by written  notice to ACNB that there has been a
     material  breach  by  ACNB of any  representation,  warranty,  covenant  or
     agreement  contained  herein  and such  breach is not cured or not  curable
     within  thirty  (30) days after  written  notice of such breach is given to
     ACNB by  Farmers  Bancorp  or (ii)  by  written  notice  to ACNB  that  any
     condition  precedent  to  Farmers  Bancorp's  obligations  as set  forth in
     Article VI of this Agreement has not been met or waived by Farmers  Bancorp
     at

                                       43

<PAGE>


     such time as such condition can no longer be satisfied  through no fault of
     Farmers Bancorp or Farmers National, on June 30, 1999.

(c)  by ACNB by  written  notice  to the  other  parties,  in the event (i) of a
     material   breach  by  Farmers   Bancorp  or   Farmers   National   of  any
     representation,  warranty,  covenant or agreement contained herein and such
     breach is not cured or not curable  within  thirty (30) days after  written
     notice  of such  breach  is given to  Farmers  Bancorp  by ACNB or (ii) any
     condition  precedent  to ACNB's  obligations  as set forth in Article VI of
     this  Agreement  has not been met or  waived  by ACNB at such  time as such
     condition  can no longer  be  satisfied,  through  no fault of ACNB or ACNB
     North, on June 30, 1999.

(d)  by ACNB or Farmers  Bancorp by  written  notice to the other,  in the event
     that the Merger is not consummated by June 30, 1999,  unless the failure to
     so  consummate  by such time is due to the  breach  of any  representation,
     warranty or covenant  contained in this  Agreement by the party  seeking to
     terminate, provided, however, that such date may be extended by the written
     agreement of the parties hereto.

(e)  within  thirty  (30)  days of the date of this  Agreement,  by ACNB or ACNB
     North by giving written notice to Farmers  Bancorp,  if any matter or thing
     has come to the  attention of ACNB or ACNB North in the course of their due
     diligence investigation,  or otherwise,  with respect to Farmers Bancorp or
     Farmers National that lead them to believe that it would be inadvisable for
     ACNB or ACNB North, in their sole and exclusive  judgment,  to proceed with
     the transactions contemplated by this Agreement.

(f)  within thirty (30) days of the date of this  Agreement,  by Farmers Bancorp
     or Farmers  National  by giving  written  notice to ACNB,  if any matter or
     thing has come to the attention of Farmers  Bancorp or Farmers  National in
     the course of their due diligence investigation, or otherwise, with respect
     to ACNB  or  ACNB  North  that  lead  them to  believe  that  it  would  be
     inadvisable  for  Farmers  Bancorp or Farmers  National,  in their sole and
     exclusive judgment,  to proceed with the transactions  contemplated by this
     Agreement.

SECTION 7.2 Effect of Termination.

     In the event of the termination of this Agreement as provided  above,  this
Agreement  shall  thereafter  become  void and have no effect,  except  that the
provisions  of  Section  3.1(p)  (Fees),  Sections  4.3  and  5.2  (relating  to
confidentiality  and return of  documents),  Sections  4.14 (Press  Releases and
Publicity) and Sections 7.3 and 9.10  (Expenses) of this Agreement shall survive
any such termination and abandonment.

                                       44

<PAGE>

SECTION 7.3  Expenses.

     Any  termination  of this Agreement  pursuant to Sections  7.1(a) or 7.l(d)
hereof shall be without  cost,  expense or liability on the part of any party to
the others.  Any  termination  of this  Agreement  pursuant to Section 7.1(b) or
7.1(c)  hereof shall also be without  cost,  liability or expense on the part of
any party to the others,  unless the breach of a  representation  or warranty or
covenant is caused by the willful conduct or gross  negligence of a party or the
circumstances of, in which event said party shall be liable to the other parties
for  all  out-of  pocket  costs  and  expenses,  including  without  limitation,
reasonable legal, accounting and investment banking fees and expenses,  incurred
by such other party in connection  with their  entering into this  Agreement and
their carrying out of any and all acts contemplated hereunder ("Expenses").  Any
termination  of this  Agreement  pursuant to Section  7.1(e) or (f) hereof shall
also be  without  cost,  liability  or  expense  on the part of any party to the
others,  unless the termination is caused by willful  misrepresentation or fraud
of, in the case of Section 7.1(e), Farmers Bancorp or Farmers National, in which
event  Farmers  Bancorp shall be liable to ACNB and ACNB North for all Expenses,
and in the case of Section 7.1(f), ACNB or ACNB North, in which event ACNB shall
be liable to Farmers Bancorp and Farmers National for all Expenses.


                                  ARTICLE VIII
                             POST MERGER AGREEMENTS

SECTION 8.1   Employees.

(a)  Farmers National's employees who are employed in good standing and actively
     at work as of the  Effective  Date (the  "Continuing  Employees")  shall be
     employed and retained in their current  positions with compensation no less
     than current levels of compensation, with such changes in the future as may
     be  appropriate,  as determined by Farmers  National's  Board of Directors.
     Notwithstanding the foregoing, ACNB shall retain the right to terminate any
     of the  Continuing  Employees at any time  following the Effective Date for
     "Good Reason", as that term shall be defined by ACNB.

(b)  After the Effective Date, all benefits of the Continuing  Employees will be
     maintained  at a level not less than equal to the  benefits  enjoyed by the
     employees  of  Farmers  National  prior to the  Effective  Date,  with such
     changes  in the  future as may be  appropriate,  as  determined  by Farmers
     National's Board of Directors.

(c)  After the Effective Date,  Continuing  Employees shall be eligible to apply
     for any positions available at ACNB, or any of its subsidiaries.

SECTION 8.2   Officers.

     Farmers National's  officers who are employed in good standing and actively
at work as of the Effective Date (the  "Continuing  Officers") shall be employed
and retained in their current

                                       45

<PAGE>


management positions with compensation at least equal to their current levels of
compensation,  with  such  changes  in the  future  as may  be  appropriate,  as
determined  by  Farmers  National's  Board  of  Directors.  Notwithstanding  the
foregoing,  ACNB  shall  retain  the right to  terminate  any of the  Continuing
Officers at any time  following the Effective  Date for "Good  Reason",  as that
term shall be defined by ACNB.

SECTION 8.3   Directors.

     On the Effective Date, two (2) persons who are mutually agreed upon by ACNB
and Farmers  Bancorp and who previously  served as directors of Farmers  Bancorp
shall be appointed  to the board of directors of ACNB,  one person to serve as a
Class 1  Director,  one  person to serve as a Class 2  Director,  and each shall
serve until such time as his  successor  has been duly  elected,  qualified,  or
appointed.  ACNB agrees to waive any mandatory retirement requirements contained
in its by-laws so far as such requirement pertains to such two persons.

SECTION 8.4   Farmers National Board of Directors.

(a)  Composition;  Term; Duties.  Immediately  following the Effective Time, the
     Board of Directors of Farmers  National shall consist of the members of the
     board  immediately  preceding the Effective  Time, with the addition of Ms.
     Carolyn H. Kough and Mr. Ronald L. Hankey.  Following  the Effective  Date,
     ACNB,  consistent with its fiduciary duties, shall continue to recommend on
     an annual basis that the then current  members of the Board of Directors of
     Farmers National be re-elected.

(b)  Compensation.  Following  the  Effective  Date,  each member of the Farmers
     National  board of  directors  shall  receive  an  annual  retainer  of two
     thousand  eight hundred and fifty  dollars  ($2,850) for each year in which
     such director attends at least 10 meetings of the Farmers National board of
     directors,  a monthly fee of two hundred and sixty-five  dollars  ($265.00)
     for each  meeting of the board of  directors  attended,  committee  fees of
     eighty  dollars  ($80) per hours,  a seminar  fee of two  hundred and fifty
     dollars  ($250) per half day and four hundred  dollars  ($400) per full day
     seminar, plus applicable expenses, as compensation for services rendered in
     their capacity as a Director.

SECTION 8.5 Certain Matters.

     ACNB shall continue the separate corporate existence of Farmers National as
an operating  subsidiary,  with the  corporate  name  "Farmers  National Bank of
Newville", with such changes in the future as may be appropriate,  as determined
by Farmers  National's  Board of  Directors.  ACNB shall use its best efforts to
maintain  the level of customer  service and  community  support as has been the
custom of Farmers Bancorp and Farmers National.

SECTION 8.6 NASDAQ Listing.

     Within one hundred and eighty (180) days following the Effective Date, ACNB
shall use its best efforts to apply to the National  Association  of  Securities
Dealers ("NASD") and qualify for

                                       46

<PAGE>


quotation of ACNB Common Stock on the National Association of Securities Dealers
Automatic  Quotations  ("NASDAQ")  National  Market  System or NASDAQ  Small Cap
Stocks,  as applicable.  Notwithstanding  the foregoing,  ACNB shall be under no
obligation to make  application  to the NASD for listing of ACNB Common Stock on
NASDAQ if such application  and/or listing is deemed  impractical or inadvisable
by ACNB's financial and/or legal advisors.


                                   ARTICLE IX
                                 OTHER MATTERS

SECTION 9.1 Certain Definitions; interpretation.

     As used in this  Agreement,  the  following  terms shall have the  meanings
indicated:

          "Material"  means  material to the party in question  (as the case may
          be) and its respective subsidiaries, taken as a whole.

          "Material  Adverse  Effect,"  with  respect  to a  person,  means  any
          condition,  event,  change or  occurrence  that has or  results  in an
          effect which is material and adverse to (A) the  financial  condition,
          properties,  assets,  business or results of operations of such person
          and its  subsidiaries,  taken as a whole,  or (B) the  ability of such
          person  to  perform  its  obligations  under,  and to  consummate  the
          transactions  contemplated by, this Agreement.  In the case of Farmers
          National,  receipt of a CAMELS rating in connection  with a safety and
          soundness  examination which is lower than the rating given to Farmers
          National in connection with the safety and soundness  examination most
          recently  reported prior to the date of this Agreement shall be deemed
          to have a "Material Adverse Effect" on Farmers National.

          "Person"   includes   an   individual,    corporation,    partnership,
          association, trust or unincorporated organization.

          "Subsidiary,"  with  respect  to a  person,  means  any  other  person
          controlled by such person.

When a reference is made in this  Agreement to  Exhibits,  Sections,  Annexes or
Schedules,  such  reference  shall be to a Section of, or Annex or Schedule  to,
this Agreement unless otherwise indicated.  The table of contents, tie sheet and
headings  contained in this  Agreement are for ease of reference  only and shall
not affect the meaning or interpretation  of this Agreement.  Whenever the words
"include," "includes," or "including" are used in this Agreement,  they shall be
deemed  followed by the words  "without  limitation".  Any singular term in this
Agreement  shall be  deemed to  include  the  plural,  and any  plural  term the
singular.

                                       47

<PAGE>

SECTION 9.2  Survival.

     The representations,  warranties and agreements of the parties set forth in
this Agreement shall not survive the Effective Time, and shall be terminated and
extinguished  at the Effective  Time, and from and after the Effective Time none
of the parties  hereto  shall have any  liability to the other on account of any
breach or failure of any of those  representations,  warranties and  agreements;
provided,  however,  that the foregoing clause shall not (i) apply to agreements
of the parties which by their terms are intended to be performed either in whole
or in part after the  Effective  Time,  and (ii) shall not relieve any person of
liability for fraud, deception or intentional misrepresentation.

SECTION 9.3 Parties in Interest.

     This  Agreement  shall be binding  upon and inure  solely to the benefit of
each party hereto and their respective  successors and assigns,  and, other than
the right to receive the consideration payable in the Merger pursuant to Article
II hereof,  is not  intended to and shall not confer  upon any other  person any
rights, benefits or remedies of any nature whatsoever under or by reason of this
Agreement.

SECTION 9.4  Captions.

     The captions  contained in this  Agreement are for reference  purposes only
and are not part of this Agreement.

SECTION 9.5  Severability.

     If any provision of this Agreement or the application  thereof to any party
or circumstance  shall be invalid or unenforceable to any extent,  the remainder
of this  Agreement and the  application  of such  provisions to other parties or
circumstances  shall  not be  affected  thereby  and  shall be  enforced  to the
greatest extent permitted by law.

SECTION 9.6 Access; Confidentiality.

     The parties  hereby  agree to conduct the  investigations  and  discussions
contemplated  by Section 4.3 and Section 5.2 of this Agreement in a manner so as
to not interfere  unreasonably  with normal operations and customer and employee
relationships.  If the  transactions  contemplated  by  this  Agreement  are not
consummated,  the parties  hereby agree to destroy or return all  documents  and
records obtained from the other or their respective  representatives  during the
course of any  investigation  and will cause all information with respect to the
other party obtained  pursuant to this Agreement or preliminarily  thereto to be
kept confidential,  except to the extent such information becomes public through
no  fault  of the  party  which  has  obtained  such  information  or any of its
respective  representatives or agents and except to the extent disclosure of any
such information is legally required. Each party hereby agrees to give the other
party prompt notice of any  contemplated  disclosure where such disclosure is so
legally required.


                                       48

<PAGE>


SECTION 9.7 Waiver and Amendment.

     Prior to the Effective  Time,  any provision of this  Agreement may be: (i)
waived by the party benefitted by the provision;  or (ii) amended or modified at
any time (including the structure of the transaction) by an agreement in writing
between the parties  hereto  approved by their  respective  boards of directors,
except that no amendment or waiver may be made that would change the form or the
amount of the merger  consideration  or otherwise have the effect of prejudicing
the Farmers Bancorp shareholders' interest in the merger consideration following
the Farmers Bancorp Shareholders' Meeting.

SECTION 9.8  Counterparts.

     This  Agreement  may be  executed in  counterparts,  each of which shall be
deemed to constitute an original, but all of which together shall constitute one
and the same instrument.

SECTION 9.9 Governing Law.

     This Agreement  shall be governed by, and  interpreted in accordance  with,
the laws of the Commonwealth of Pennsylvania,  or, to the extent it may control,
federal law, without reference to the choice of law principles thereof.

SECTION 9.10  Expenses.

     Subject to the  provisions  of Section 7.3 hereof,  each party  hereto will
bear all  Expenses  incurred by it in  connection  with this  Agreement  and the
transactions  contemplated hereby; provided,  however, that all filing and other
fees (other  than  federal and state  income  taxes)  required to be paid to any
governmental  agency or authority in  connection  with the  consummation  of the
transactions contemplated hereby shall be paid by ACNB.

SECTION 9.11  Notices.

     All notices,  requests,  acknowledgments and other communications hereunder
to a party  shall be in writing and shall be deemed to have been duly given when
delivered by hand,  telecopy,  telegram or telex  (confirmed in writing) to such
party at its  address  set forth  below or such other  address as such party may
specify by notice to the other party hereto.

         If to Farmers Bancorp, to:

                  Farmers National Bancorp, Inc.
                  1 W. Big Spring Avenue
                  P.O. Box 156
                  Newville, PA 17241-0156
                  Attention:        Mr. Edgar S. Heberlig
                                    Chairman of the Board of Directors


                                       49

<PAGE>




         If to Farmers National, to:

                  Farmers National Bank of Farmers National
                  1 W. Big Spring Avenue
                  P.O. Box 156
                  Newville, PA 17241-0156
                  Attention:        Mr. Mervin J. Morrison
                                    President

         If to ACNB, to:

                  ACNB Corporation
                  P. O. Box 3129
                  Gettysburg, PA 17325
                  Attention:        Mr. Ronald L. Hankey
                                    President and Chief Executive Officer

         If to ACNB North, to:

                  ACNB North, Inc.
                  c/o ACNB Corporation
                  P. O. Box 3129
                  Gettysburg, PA 17325
                  Attention:        Mr. Ronald L. Hankey
                                    President and Chief Executive Officer

SECTION 9.12  Entire Agreement; Etc.

     This Agreement,  together with such other agreements as are executed by the
parties  in  connection  herewith,  on the date  hereof,  represents  the entire
understanding   of  the  parties  hereto  with  reference  to  the  transactions
contemplated  hereby and supersedes any and all other oral or written agreements
heretofore made. All terms and provisions of this Agreement,  together with such
other agreements as are executed by the parties in connection  herewith,  on the
date hereof, shall be binding upon and shall inure to the benefit of the parties
hereto and their respective successors and assigns. Nothing in this Agreement is
intended  to confer  upon any other  person any rights or remedies of any nature
whatsoever under or by reason of this Agreement except as expressly provided.


                                       50

<PAGE>


     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Agreement to be
executed  by their duly  authorized  officers as of the day and year first above
written.

                                           ACNB CORPORATION



/s/ John W. Krichten                      /s/ Ronald L. Hankey
- --------------------------                ----------------------------
John W. Krichten, Secretary           By: Ronald L. Hankey
                                   Title: President and Chief Executive Officer

                                          ACNB NORTH, INC.


/s/ John W. Krichten                      /s/ Ronald L. Hankey
- --------------------------                -----------------------------
John W. Krichten, Secretary           By: Ronald L. Hankey
                                   Title: President and Chief Executive Officer


                                          FARMERS NATIONAL BANCORP, INC.



/s/ W. Irvin Nelson                        /s/ Edgar S. Heberlig
- --------------------------                ---------------------------------
W. Irvin Nelson, Secretary            By: Edgar S. Heberlig
                                   Title: Chairman of the Board of Directors


                                         FARMERS NATIONAL BANK OF NEWVILLE



/s/ James E. Showvaker                    /s/ Mervin J. Morrison
- -------------------------                ----------------------------------
James E. Showvaker, Cashier           By: Mervin J. Morrison
                                   Title: President



<PAGE>
                                    ANNEX B

                OPINION OF GARLAND MCPHERSON & ASSOCIATES, INC.

<PAGE>

               [GARLAND McPHERSON & ASSOCIATES, INC. LETTERHEAD]


_______________, 1998


The Board of Directors
Farmers National Bancorp, Inc.
1 West Big Spring Avenue
Newville, PA 17241

Members of the Board:

You have  requested  our opinion as to the fairness,  from a financial  point of
view, to the  shareholders  of Farmers  National  Bancorp,  Inc.  ("FNB") of the
Agreement and Plan of  Reorganization  (the  "Agreement")  pursuant to which FNB
will combine with and into ACNB Corporation ("ACNB") by means of a merger. Under
the terms of the Agreement,  each outstanding  share of FNB common stock will be
converted into 2.266 shares of ACNB common stock.

Garland McPherson & Associates, Inc., as part of its investment banking and bank
consulting  business,  is  engaged in the  valuation  of  financial  institution
securities for a variety of purposes,  including mergers and  acquisitions,  and
the determination of adequate consideration in such transactions.

For purposes of this opinion, we reviewed and analyzed information pertaining to
the financial and operating condition of FNB and ACNB. This review included, but
was not limited to: (i) the Agreement and Plan of Reorganization; (ii) financial
and other information which was publicly  available or provided to us by FNB and
ACNB; (iii) certain  financial  information  relating to the banking industry in
general;  (iv) the respective history of dividends paid by the two institutions;
(v) our evaluation of future  prospects for the merged  institution;  (vi) terms
and conditions of comparable merger  transactions and (vii) such other financial
reviews, analyses, and investigations as we deemed appropriate.

In  rendering  our  opinion,  we  conducted  discussions  with members of senior
management of FNB and ACNB concerning their respective  businesses and prospects
and  have  relied  on  the  accuracy  and   completeness   of  information   and
representations  delivered to us by FNB and ACNB and their officers,  directors,
counsel,  and other agents. We have not  independently  verified the information
reviewed  by us (either  publicly  available  or provided to us by FNB and ACNB)
and, in  rendering  our  opinion,  have relied  upon such  information  as being
complete and accurate in all material respects.

We have assumed  that the  allowances  for loan losses  indicated on the balance
sheets of FNB and ACNB as of June 30, 1998 are adequate to cover such losses. We
have not reviewed the loan files

<PAGE>
The Board of Directors                                 _______________, 1998
Farmers National Bancorp, Inc.                                        Page 2


of FNB or ACNB,  nor did we make an  independent  valuation  or appraisal of the
assets and liabilities of FNB and ACNB.

We assumed that in the course of obtaining  the necessary  regulatory  approvals
for the  Merger,  no  restrictions  will be  imposed  on ACNB that  would have a
material  adverse effect on the  contemplated  benefits of the Merger to FNB. We
further  assumed that no change would occur in applicable law or regulation that
would cause a material  adverse  change in the  prospects or  operations of ACNB
after the Merger. We express no opinion as to the tax consequences of the merger
to FNB and its shareholders.

Our conclusion is based on the market,  economic and other conditions prevailing
as of the date hereof and the current  conditions and prospects of FNB and ACNB.
Events occurring subsequent to this date could materially affect the assumptions
and conclusions  contained in our opinion.  We express no opinion as to what the
value of ACNB common  stock will be at the time the Merger is  consummated.  Our
opinion pertains only to the financial  consideration of the Merger and does not
constitute a recommendation  to the Board of FNB nor a recommendation  as to how
FNB shareholders should vote with regard to the Merger.

Based  upon and  subject  to the  foregoing,  it is our  opinion  as of the date
hereof,  that the  exchange and the ACNB  consideration  to be received is fair,
from a financial point of view, to the shareholders of Farmers National Bancorp,
Inc.

Sincerely,


Garland McPherson & Associates, Inc.


<PAGE>

                                    ANNEX C

            PENNSYLVANIA BUSINESS CORPORATION LAW OF 1988, AS AMENDED
                          EXCERPTS FROM SUBCHAPTER 19C
<PAGE>

            PENNSYLVANIA BUSINESS CORPORATION LAW OF 1988, AS AMENDED
                          EXCERPTS FROM SUBCHAPTER 19C

Section 1930. Dissenters rights

     (a)  General rule. If any  shareholder of a domestic  business  corporation
          that is to be a party to a merger or consolidation  pursuant to a plan
          of  merger  or  consolidation   objects  to  the  plan  of  merger  or
          consolidation  and complies  with the  provisions  of  Subchapter D of
          Chapter 15 (relating to dissenters  rights),  the shareholder shall be
          entitled to the rights and remedies of dissenting shareholders therein
          provided,  if any. See also section  1906(c)  (relating to  dissenters
          rights upon special treatment).


                                 SUBCHAPTER 15D

                                Dissenters Rights

Section:

1571. Application and effect of subchapter.

1572. Definitions.

1573. Record and beneficial holders and owners.

1574. Notice of intention to dissent.

1575. Notice to demand payment.

1576.Failure to comply  with notice to demand  payment,  etc.  1577.  Release of
     restrictions  or payment for shares.  1578.  Estimate by  dissenter of fair
     value of shares. 1579.  Valuation  proceedings  generally.  1580. Costs and
     expenses of valuation proceedings.


Section 1571. Application and effect of Subchapter.

     (a)  General  rule.  Except as otherwise  provided in  subsection  (b), any
          shareholder of a business  corporation shall have the right to dissent
          from,  and to obtain  payment  of the fair  value of his shares in the
          event of, any corporate  action, or to otherwise obtain fair value for
          his shares,  where this part  expressly  provides  that a  shareholder
          shall have the rights and remedies provided in this subchapter. See:

          Section   1906(c)   (relating  to   dissenters   rights  upon  special
          treatment).

          Section 1930 (relating to dissenters rights).

          Section 1931(d) (relating to dissenters rights in share exchanges).

          Section 1932(c) (relating to dissenters rights in asset transfers).

          Section 1952(d) (relating to dissenters rights in division).

          Section 1962(c) (relating to dissenters rights in conversion).


<PAGE>
          Section 2104(b) (relating to procedure).

          Section 2324  (relating to  corporation  option where a restriction on
          transfer of a security is held invalid).

          Section 2325(b) (relating to minimum vote requirement).

          Section 2704(c) (relating to dissenters rights upon election).

          Section  2705(d)  (relating  to  dissenters  rights  upon  renewal  of
          election).

          Section  2907(a)  (relating  to  proceedings  to  terminate  breach of
          qualifying conditions).

          Section 7104(b)(3) (relating to procedure).

     (b)  Exceptions.

          (1)  Except as otherwise provided in paragraph (2), the holders of the
               shares of any class or series of shares that,  at the record date
               fixed to determine the shareholders  entitled to notice of and to
               vote at the meeting at which a plan  specified  in any of section
               1930, 1931(d), 1932(c) or 1952(d) is to be voted on, are either:

               (i)  listed on a national securities exchange; or

               (ii) held of record by more than 2,000 shareholders;

               shall not have the right to obtain  payment  of the fair value of
               any such shares under this subchapter.

          (2)  Paragraph (1) shall not apply to and  dissenters  rights shall be
               available  without  regard  to the  exception  provided  in  that
               paragraph in the case of:

               (i)  Shares  converted by a plan if the shares are not  converted
                    solely into shares of the acquiring, surviving, new or other
                    corporation  or solely into such shares and money in lieu of
                    fractional shares.

               (ii) Shares  of  any   preferred  or  special  class  unless  the
                    articles,  the plan or the terms of the transaction  entitle
                    all  shareholders  of the class to vote  thereon and require
                    for the  adoption  of the  plan or the  effectuation  of the
                    transaction the affirmative  vote of a majority of the votes
                    cast by all shareholders of the class.

               (iii)Shares  entitled to dissenters  rights under section 1906(c)
                    (relating to dissenters rights upon special treatment).

     (3)  The  shareholders of a corporation  that acquires by purchase,  lease,
          exchange or other  disposition all or substantially all of the shares,
          property or assets of another  corporation  by the issuance of shares,
          obligations or otherwise,  with or without assuming the liabilities of
          the other  corporation and with or without the intervention of another
          corporation or other person, shall not be


<PAGE>

          entitled  to  the  rights  and  remedies  of  dissenting  shareholders
          provided in this subchapter regardless of the fact, if it be the case,
          that the acquisition was accomplished by the issuance of voting shares
          of the corporation to be outstanding immediately after the acquisition
          sufficient  to  elect  a  majority  or more  of the  directors  of the
          corporation.

     (c)  Grant of optional dissenters rights. The bylaws or a resolution of the
          board of directors  may direct that all or a part of the  shareholders
          shall have dissenters  rights in connection with any corporate  action
          or  other   transaction   that  would   otherwise   not  entitle  such
          shareholders to dissenters rights.

     (d)  Notice of dissenters rights.  Unless otherwise provided by statute, if
          a proposed  corporate action that would give rise to dissenters rights
          under  this   subpart  is   submitted  to  a  vote  at  a  meeting  of
          shareholders,  there shall be included in or enclosed  with the notice
          of meeting:

          (1)  a  statement  of the  proposed  action and a  statement  that the
               shareholders  have a right to dissent  and obtain  payment of the
               fair value of their  shares by  complying  with the terms of this
               subchapter; and

          (2) a copy of this subchapter.

     (e)  Other  statutes.  The  procedures  of this  subchapter  shall  also be
          applicable to any transaction described in any statute other than this
          part that  makes  reference  to this  subchapter  for the  purpose  of
          granting dissenters rights.

     (f)  Certain provisions of articles ineffective. This subchapter may not be
          relaxed by any provision of the articles.

     (g)  Cross  references.  See  sections  1105  (relating to  restriction  on
          equitable  relief),  1904 (relating to de facto  transaction  doctrine
          abolished) and 2512 (relating to dissenters rights procedure).

Section 1572. Definitions.

The  following  words and phrases  when used in this  subchapter  shall have the
meanings  given to them in this  section  unless the context  clearly  indicates
otherwise:

     "Corporation."  The  issuer of the  shares  held or owned by the  dissenter
     before the  corporate  action or the  successor  by merger,  consolidation,
     division,  conversion  or otherwise of that issuer.  A plan of division may
     designate which of the resulting  corporations is the successor corporation
     for the  purposes  of  this  subchapter.  The  successor  corporation  in a
     division  shall have sole  responsibility  for payments to  dissenters  and
     other liabilities under this subchapter except as otherwise provided in the
     plan of division.

<PAGE>


     "Dissenter." A shareholder or beneficial  owner who is entitled to and does
     assert  dissenters rights under this subchapter and who has performed every
     act required up to the time involved for the assertion of those rights.

     "Fair value." The fair value of shares  immediately before the effectuation
     of the corporate action to which the dissenter objects, taking into account
     all relevant  factors,  but excluding any  appreciation  or depreciation in
     anticipation of the corporate action.

     "Interest."  Interest from the effective date of the corporate action until
     the date of payment at such rate as is fair and equitable  under all of the
     circumstances,  taking into account all  relevant  factors,  including  the
     average rate currently paid by the corporation on its principal bank loans.

Section 1573. Record and beneficial holders and owners.

     (a)  Record  holders  of  shares.  A record  holder of shares of a business
          corporation may assert  dissenters  rights as to fewer than all of the
          shares  registered in his name only if he dissents with respect to all
          the shares of the same class or series  beneficially  owned by any one
          person and  discloses the name and address of the person or persons on
          whose  behalf  he  dissents.  In  that  event,  his  rights  shall  be
          determined as if the shares as to which he has dissented and his other
          shares were registered in the names of different shareholders.

     (b)  Beneficial  owners  of  shares.  A  beneficial  owner of  shares  of a
          business   corporation  who  is  not  the  record  holder  may  assert
          dissenters  rights with respect to shares held on his behalf and shall
          be  treated  as a  dissenting  shareholder  under  the  terms  of this
          subchapter if he submits to the corporation not later than the time of
          the  assertion of  dissenters  rights a written  consent of the record
          holder.  A  beneficial  owner may not dissent with respect to some but
          less than all shares of the same  class or series  owned by the owner,
          whether or not the shares so owned by him are registered in his name.

Section 1574. Notice of intention to dissent.

     If the  proposed  corporate  action is  submitted to a vote at a meeting of
     shareholders  of a business  corporation,  any person who wishes to dissent
     and  obtain  payment  of the fair  value of his  shares  must file with the
     corporation,  prior to the vote,  a written  notice of  intention to demand
     that he be paid the fair  value for his  shares if the  proposed  action is
     effectuated,  must  effect  no change in the  beneficial  ownership  of his
     shares from the date of such filing continuously through the effective date
     of the proposed  action and must refrain from voting his shares in approval
     of such action.  A dissenter who fails in any respect shall not acquire any
     right to payment of the fair  value of his  shares  under this  subchapter.
     Neither a proxy nor a vote  against the  proposed  corporate  action  shall
     constitute the written notice required by this section.


<PAGE>

Section 1575. Notice to demand payment.

     (a)  General  rule.  If the  proposed  corporate  action is approved by the
          required vote at a meeting of shareholders of a business  corporation,
          the corporation shall mail a further notice to all dissenters who gave
          due notice of intention  to demand  payment of the fair value of their
          shares and who refrained from voting in favor of the proposed  action.
          If the  proposed  corporate  action  is to be taken  without a vote of
          shareholders,  the corporation  shall send to all shareholders who are
          entitled  to  dissent  and  demand  payment of the fair value of their
          shares a notice of the adoption of the plan or other corporate action.
          In either case, the notice shall:

          (1)  State  where  and  when a  demand  for  payment  must be sent and
               certificates for  certificated  shares must be deposited in order
               to obtain payment.

          (2)  Inform holders of  uncertificated  shares to what extent transfer
               of  shares  will be  restricted  from the time  that  demand  for
               payment is received.

          (3)  Supply a form for  demanding  payment that includes a request for
               certification of the date on which the shareholder, or the person
               on whose behalf the  shareholder  dissents,  acquired  beneficial
               ownership of the shares.

          (4) Be accompanied by a copy of this subchapter.

     (b)  Time for  receipt of demand for  payment.  The time set for receipt of
          the demand and deposit of  certificated  shares shall be not less than
          30 days from the mailing of the notice.

Section 1576. Failure to comply with notice to demand payment, etc.

     (a)  Effect of failure of  shareholder  to act. A shareholder  who fails to
          timely demand payment,  or fails (in the case of certificated  shares)
          to timely deposit  certificates,  as required by a notice  pursuant to
          section 1575 (relating to notice to demand payment) shall not have any
          right under this  subchapter  to receive  payment of the fair value of
          his shares.

     (b)  Restriction  on   uncertificated   shares.   If  the  shares  are  not
          represented by  certificates,  the business  corporation  may restrict
          their  transfer  from the time of receipt of demand for payment  until
          effectuation  of the  proposed  corporate  action  or the  release  of
          restrictions  under the terms of section 1577(a)  (relating to failure
          to effectuate corporate action).

     (c)  Rights retained by  shareholder.  The dissenter shall retain all other
          rights  of  a   shareholder   until  those   rights  are  modified  by
          effectuation of the proposed corporate action.

<PAGE>

Section 1577. Release of restrictions or payment for shares.

     (a)  Failure to effectuate corporate action.  Within 60 days after the date
          set for demanding payment and depositing certificates, if the business
          corporation  has not  effectuated the proposed  corporate  action,  it
          shall return any  certificates  that have been  deposited  and release
          uncertificated shares from any transfer restrictions imposed by reason
          of the demand for payment.

     (b)  Renewal of notice to demand payment.  When uncertificated  shares have
          been released from transfer  restrictions  and deposited  certificates
          have been returned,  the  corporation may at any later time send a new
          notice  conforming to the  requirements  of section 1575  (relating to
          notice to demand payment), with like effect.

     (c)  Payment of fair value of shares.  Promptly after  effectuation  of the
          proposed  corporate  action,  or upon  timely  receipt  of demand  for
          payment if the  corporate  action has already  been  effectuated,  the
          corporation  shall either remit to dissenters who have made demand and
          (if their shares are certificated)  have deposited their  certificates
          the amount that the corporation  estimates to be the fair value of the
          shares,  or give written notice that no remittance  under this section
          will be made. The remittance or notice shall be accompanied by:

          (1)  The closing  balance  sheet and statement of income of the issuer
               of the shares  held or owned by the  dissenter  for a fiscal year
               ending not more than 16 months  before the date of  remittance or
               notice  together  with the  latest  available  interim  financial
               statements.

          (2)  A statement  of the  corporation's  estimate of the fair value of
               the shares.

          (3)  A notice  of the right of the  dissenter  to  demand  payment  or
               supplemental  payment,  as the case may be, accompanied by a copy
               of this subchapter.

     (d)  Failure to make payment.  If the corporation does not remit the amount
          of its  estimate  of the  fair  value of the  shares  as  provided  by
          subsection  (c),  it shall  return  any  certificates  that  have been
          deposited  and  release   uncertificated   shares  from  any  transfer
          restrictions  imposed  by  reason  of  the  demand  for  payment.  The
          corporation  may make a  notation  on any such  certificate  or on the
          records of the corporation relating to any such uncertificated  shares
          that such  demand  has been  made.  If shares  with  respect  to which
          notation has been so made shall be  transferred,  each new certificate
          issued   therefor   or  the  records   relating  to  any   transferred
          uncertificated shares shall bear a similar notation, together with the
          name of the  original  dissenting  holder or owner of such  shares.  A
          transferee  of such  shares  shall not  acquire by such  transfer  any
          rights in the corporation other than those that the original dissenter
          had after making demand for payment of their fair value.


<PAGE>

Section 1578. Estimate by dissenter of fair value of shares.

     (a)  General rule. If the business corporation gives notice of its estimate
          of the fair value of the shares,  without  remitting  such amount,  or
          remits  payment of its  estimate  of the fair  value of a  dissenter's
          shares as  permitted by section  1577(c)  (relating to payment of fair
          value of shares) and the dissenter  believes that the amount stated or
          remitted is less than the fair value of his shares, he may send to the
          corporation  his own  estimate of the fair value of the shares,  which
          shall be deemed a demand for payment of the amount or the deficiency.

     (b)  Effect of failure to file estimate.  Where the dissenter does not file
          his own estimate under subsection (a) within 30 days after the mailing
          by the corporation of its remittance or notice, the dissenter shall be
          entitled  to no more than the amount  stated in the notice or remitted
          to him by the corporation.

Section 1579. Valuation proceedings generally.

     (a) General rule. Within 60 days after the latest of:

          (1)  effectuation of the proposed corporate action;

          (2)  timely  receipt of any  demands for payment  under  Section  1575
               (relating to notice to demand payment); or

          (3)  timely  receipt  of  any  estimates   pursuant  to  section  1578
               (relating to estimate by dissenter of fair value of shares);

          if any demands for payment remain unsettled,  the business corporation
          may file in court an application  for relief  requesting that the fair
          value of the shares be determined by the court.

     (b)  Mandatory joinder of dissenters.  All, dissenters,  wherever residing,
          whose  demands  have not been  settled  shall be made  parties  to the
          proceeding  as in an  action  against  their  shares.  A  copy  of the
          application shall be served on each such dissenter.  If a dissenter is
          a nonresident, the copy may be served on him in the manner provided or
          prescribed  by or pursuant to 42 Pa.C.S.  Ch. 53 (relating to bases of
          jurisdiction and interstate and international procedure).

     (c)  Jurisdiction  of the court.  The  jurisdiction  of the court  shall be
          plenary and  exclusive.  The court may appoint an appraiser to receive
          evidence  and  recommend a decision  on the issue of fair  value.  The
          appraiser  shall have such power and  authority as may be specified in
          the order of appointment or in any amendment thereof.


<PAGE>
     (d)  Measure  of  recovery.  Each  dissenter  who is made a party  shall be
          entitled  to recover  the amount by which the fair value of his shares
          is found to exceed  the  amount,  if any,  previously  remitted,  plus
          interest.

     (e)  Effect  of  corporation's   failure  to  file   application.   If  the
          corporation  fails to file an  application  as provided in  subsection
          (a), any dissenter  who made a demand and who has not already  settled
          his  claim  against  the  corporation  may  do so in the  name  of the
          corporation  at any time  within 30 days after the  expiration  of the
          60-day period. If a dissenter does not file an application  within the
          30-day period, each dissenter entitled to file an application shall be
          paid the corporation's estimate of the fair value of the shares and no
          more,  and may bring an action to recover  any  amount not  previously
          remitted.

Section 1580. Costs and expenses of valuation proceedings.

     (a)  General rule. The costs and expenses of any  proceeding  under section
          1579  (relating to valuation  proceedings  generally),  including  the
          reasonable compensation and expenses of the appraiser appointed by the
          court,  shall be  determined  by the court and  assessed  against  the
          business  corporation  except that any part of the costs and  expenses
          may be apportioned and assessed as the court deems appropriate against
          all or some of the  dissenters  who are  parties  and whose  action in
          demanding   supplemental  payment  under  section  1578  (relating  to
          estimate by  dissenter  of fair value of shares) the court finds to be
          dilatory, obdurate, arbitrary, vexatious or in bad faith.

     (b)  Assessment  of counsel  fees and expert  fees where lack of good faith
          appears.  Fees  and  expenses  of  counsel  and  of  experts  for  the
          respective  parties may be  assessed  as the court  deems  appropriate
          against the  corporation  and in favor of any or all dissenters if the
          corporation  failed to comply  substantially  with the requirements of
          this subchapter and may be assessed  against either the corporation or
          a dissenter,  in favor of any other party, if the court finds that the
          party  against whom the fees and  expenses  are assessed  acted in bad
          faith or in a dilatory,  obdurate,  arbitrary or  vexatious  manner in
          respect to the rights provided by this subchapter.

     (c)  Award of fees for  benefits  to other  dissenters.  If the court finds
          that the  services of counsel for any  dissenter  were of  substantial
          benefit  to other  dissenters  similarly  situated  and  should not be
          assessed  against  the  corporation,  it may  award to  those  counsel
          reasonable  fees  to be  paid  out  of  the  amounts  awarded  to  the
          dissenters who were benefitted.

<PAGE>

                                   PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 20. Indemnification of Directors and Officers.

     Subchapter D of Chapter 17 of the Pennsylvania  Business Corporation Law of
1988, as amended (15 Pa. C.S.  ss.ss.1101-4162) ("BCL") provides that a business
corporation  shall have the power under certain  circumstances  to indemnify its
directors,  officers,  employees and agents against certain expenses incurred by
them in connection with any  threatened,  pending or completed  action,  suit or
proceeding.

     Articles  9 and 10 of the  Bylaws  of  ACNB  Corporation  provide  for  the
indemnification of its directors,  officers,  employees and agents in accordance
with, and to the maximum extent  permitted by, the provisions of Subchapter D of
Chapter 17 of the BCL.

Item 21. Exhibits and Financial Statement Schedules.

     (a)  Exhibits:

          2.1  Agreement and Plan of  Reorganization  dated July 28, 1998, among
               the Farmers  National  Bancorp,  Inc.,  Farmers  National Bank of
               Newville,  ACNB  Corporation  and ACNB North,  Inc.  (Included as
               Annex  A  to  the  Joint  Proxy  Statement/Prospectus   contained
               herein.)

          3(i) Articles of Incorporation of ACNB  Corporation.  (Incorporated by
               reference to Exhibit 3 to ACNB's  Annual  Report on Form 10-K for
               the year ended  December 31, 1994,  filed with the  Commission on
               March 25, 1995.)

          3(ii)Bylaws   of  ACNB   Corporation,   as   amended   and   restated.
               (Incorporated  by  reference to Exhibit  3(ii) to ACNB's  Current
               Report on Form 8-K filed with the Commission on March 25, 1998.)

          4.1  Articles  of  Incorporation  of ACNB  Corporation.  (Included  at
               Exhibit 3(i) hereto.)

          4.2  Bylaws of ACNB Corporation, as amended and restated. (Included at
               Exhibit 3(ii) hereto.)

          5    Opinion of  Shumaker  Williams,  P.C.  re:  legality  of the ACNB
               Corporation Common Stock being registered.

          8    Form of Opinion of Shumaker Williams, P.C. re: Tax Matters.

                                      II-1

<PAGE>
          10   Executed  Employment  Agreement  dated  as of  January  1,  1998,
               between Adams County National Bank,  ACNB  Corporation and Ronald
               L.  Hankey.  (Incorporated  by  reference  to  Exhibit 99 of ACNB
               Corporation's   Current   Report  on  Form  8-K  filed  with  the
               Commission on March 25, 1998.)

          11   Statement re:  Computation  of Per Share  Earnings.  (Included at
               page  [11]  of the  Joint  Proxy  Statement/Prospectus  contained
               herein.)

          12   Statement re:  Computation of Ratios.  (Incorporated by reference
               to Exhibit 11 to Registrant's  Quarterly  Report on Form 10-Q for
               the quarter  ended June 30, 1998,  filed with the  Commission  on
               August 6, 1998.)

          13   Annual Report of ACNB  Corporation  (Incorporated by reference to
               Exhibit 13, of  Registrant's  Annual Report on Form 10-K, for the
               year ended December 31, 1997,  filed with the Commission on March
               27, 1998.)

          21   Subsidiaries of Registrant.

          23.1 Consent of Shumaker Williams, P.C. (included in Exhibit 5).

          23.2 Consent of Garland McPherson & Associates, Inc.

          23.3 Consent of Greenawalt & Company, P.C.

          23.4 Consent of Stambaugh o Ness, P.C.

          24   Power of Attorney. (Included on Signature Page.)

          99.1 Form of Farmers Bancorp, Inc. Proxy.

          99.2 Letter to  Shareholders  of Farmers  Bancorp,  Inc.  (Included in
               Proxy Statement contained herein.)

          99.3 Notice  of  Meeting.   (Included  in  Proxy  Statement  contained
               herein.)

          99.4 Statute Relating to Dissenters'  Rights.  (Included as Annex C to
               the Proxy Statement contained herein.)

     (b)  Financial Statement Schedules:

          None required.

     (c)  Opinion of Financial Advisor:

          None.


                                      II-2

<PAGE>

Item 22. Undertakings.

     (a)  1. The undersigned Registrant hereby undertakes as follows:

          (A) To file,  during  any  period  in which  offers or sales are being
     made, a post-effective  amendment to this  registration  statement:  (i) to
     include any  prospectus  required by Section  10(a)(3) of 1933 Act; (ii) to
     reflect in the  prospectus  any facts or events arising after the effective
     date of the  registration  statement  (or the  most  recent  post-effective
     amendment  thereof) which,  individually  or in the aggregate,  represent a
     fundamental  change  in the  information  set  forth  in  the  registration
     statement;  (iii) to include any material  information  with respect to the
     plan of distribution not previously disclosed in the registration statement
     or any material change to such information in the registration statement;

          Provided,  however,  that paragraphs (1)(A)(i) and (1)(A)(ii) above do
     not apply if the registration  statement is on Form S-3 or Form S-8 and the
     information required to be included in a post-effective  amendment by those
     paragraphs  is  contained  in periodic  reports  filed by the  Registration
     pursuant to Section 13 or Section 15(d) of the  Securities  Exchange Act of
     1934 that are incorporated by reference in the registration statement.

          (B) That, for the purpose of determining  any liability under the 1933
     Act,  each  such  post-effective  amendment  shall  be  deemed  to be a new
     registration  statement relating to the securities offered therein, and the
     offering of such  securities at that time shall be deemed to be the initial
     bona fide offering thereof.

          (C) To remove from registration by means of a post-effective amendment
     any  of  the  securities  being  registered  which  remain  unsold  at  the
     termination of the offering.

     2. The  undersigned  registrant  hereby  undertakes  that,  for purposes of
determining  any liability  under the 1933 Act, each filing of the  registrant's
annual  report  pursuant  to Section  13(a) or Section  15(d) of the  Securities
Exchange Act of 1934 (and, where applicable,  each filing of an employee benefit
plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of
1934) that is incorporated by reference in the  registration  statement shall be
deemed to be a new  registration  statement  relating to the securities  offered
therein,  and the offering of such  securities at the time shall be deemed to be
the initial bona fide offering thereof.

     3. The undersigned  registrant hereby undertakes as follows:  that prior to
any public  reoffering of the securities  registered  hereunder through use of a
prospectus  which is a part of this  registration  statement,  by any  person or
party who is deemed to be an underwriter  within the meaning of Rule 145(c), the
issuer  undertakes that such reoffering  prospectus will contain the information
called for by the applicable  registration  form with respect to the reofferings
by persons who may be deemed underwriters, in addition to the information called
for by the other items of the applicable form.

     The registrant  undertakes that every prospectus (i) that is filed pursuant
to the preceding  paragraph,  or (ii) that purports to meet the  requirements of
Section  10(a)(3)  of the  Act and is used in  connection  with an  offering  of
securities subject to Rule 415, will be filed as a part of an

                                      II-3

<PAGE>

amendment  to the  registration  statement  and  will  not be  used  until  such
amendment is  effective,  and that,  for purposes of  determining  any liability
under the 1933 Act, each such  post-operative  amendment shall be deemed to be a
new registration  statement relating to the securities offered therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

     4. Insofar as  indemnification  for liabilities  arising under the 1933 Act
may  be  permitted  to  directors,  officers  and  controlling  persons  of  the
registrant  pursuant  to  the  bylaws  of  the  registrant,  or  otherwise,  the
registrant  has been advised that in the opinion of the  Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore,  unenforceable. In the event that a claim for indemnification
against such  liabilities  (other than the payment by the registrant of expenses
incurred or paid by a director,  officer or controlling person of the registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director,  officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

     (b) The undersigned registrant hereby undertakes to respond to requests for
information  that is incorporated  by reference into the prospectus  pursuant to
Items 4, 10(b),  11, or 13 of this Form,  within one (1) business day of receipt
of such request,  and to send the incorporated  documents by first class mail or
other equally  prompt means.  This includes  information  contained in documents
filed subsequent to the effective date of the registration statement through the
date of responding to the request.

     (c) The undersigned  registrant hereby undertakes to supplement by means of
a  post-effective  amendment all information  concerning a transaction,  and the
company  being  acquired  involved  therein,  that  was not the  subject  of and
included in the registration statement when it became effective.

                                      II-4

<PAGE>

                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the Registrant
has duly caused this  registration  statement  to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Gettysburg,  Commonwealth
of Pennsylvania on October 13, 1998.

                                                ACNB CORPORATION
                    
                                       By:      /s/ Ronald L. Hankey
                                                ----------------------------  
                                                Ronald L. Hankey
                                                President and Chief Executive
                                                   Officer

                                POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS,  that each person whose  signature  appears
below  constitutes and appoints Ronald L. Hankey and John W. Krichten,  and each
of them, his true and lawful  attorneys-in-fact  and agents,  with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all capacities, to sign any and all amendments (including post-effective
amendments)  to this  registration  statement,  and to file the  same,  with all
exhibits  thereto,  and  other  documents  in  connection  therewith,  with  the
Securities and Exchange  Commission,  granting unto said  attorneys-in-fact  and
agents,  and each of them,  full power and  authority to do and perform each and
every act and thing  requisite and necessary to be done, as fully to all intents
and purposes as he might or could do in person,  hereby ratifying and confirming
all that said  attorneys-in-fact  and agents or either of them,  or their or his
substitutes, may lawfully do or cause to be done by virtue thereof.

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.

                                Capacity                           Date
                                --------                           ----   

/s/ Ronald L. Hankey        President, Chief Executive      October 13, 1998 
- ------------------------    Officer and Director               
Ronald L. Hankey            


/s/ John W. Krichten        Senior Vice President           October 14, 1998
- ------------------------    and Cashier, Chief Financial
John W. Krichten            Officer/Financial Accounting          
          


/s/ Philip P. Asper
- ------------------------    Director                         October 13, 1998
Philip P. Asper



- ------------------------    Director                         October __, 1998
Guy F. Donaldson

                                      II-5

<PAGE>


- ------------------------    Director                         October __, 1998
Frank Elsner, Jr.


/s/ Richard L. Galusha      Director                         October 13, 1998
- ------------------------
Richard L. Galusha


/s/ D. Richard Guise        Director and Vice Chairman       October 13, 1998
- ------------------------    of the Board
D. Richard Guise                             


- ------------------------    Director                         October __, 1998
Philip M. Jones


- ------------------------    Director                         October __, 1998
Wayne E. Lau


/s/ William B. Lower        Director                         October 13, 1998
- ------------------------
William B. Lower


/s/ Paul G. Pitzer          Director                         October 13, 1998
- ------------------------
Paul G. Pitzer


/s/ Thomas A. Ritter        Director                         October 13, 1998
- ------------------------
Thomas A. Ritter


- ------------------------    Director                         October __, 1998
Ralph S. Sandoe


/s/ Marian B. Schultz       Director                         October 13, 1998
- ------------------------
Marion B. Schultz


- ------------------------    Director                         October __, 1998
L. Robert Snyder


/s/ Jennifer L. Weaver      Director                         October 13, 1998
- ------------------------
Jennifer L. Weaver

                                      II-6

<PAGE>

                                  EXHIBIT INDEX

                                                                  Page Number
                                                                 In Sequential
  Number     Title                                               Number System
  ------     -----                                               -------------

   2.1    Agreement  and Plan of  Reorganization  dated  July
          28,  1998, among the Farmers  National  Bancorp,  Inc.,
          Farmers National Bank of  Newville,  ACNB  Corporation
          and  ACNB  North,  Inc. (Included  as Annex A to the
          Joint Proxy  Statement/Prospectus contained herein.)

  3(i)    Articles of Incorporation of ACNB  Corporation.
          (Incorporated by reference to Exhibit 3 to ACNB's
          Annual Report on Form 10-K for  the  year  ended
          December  31,  1994,   filed  with  the Commission on
          March 25, 1995.)

  3(ii)   Bylaws  of  ACNB   Corporation,   as  amended  and  
          restated. (Incorporated  by reference to Exhibit 3(ii)
          to ACNB's Current Report  on Form 8-K  filed  with the
          Commission  on March 25, 1998.)

   4.1    Articles of  Incorporation of ACNB  Corporation.
          (Included at Exhibit 3(i) hereto.)

   4.2    Bylaws of ACNB Corporation, as amended and restated.
          (Included at Exhibit 3(ii) hereto.)

   5      Opinion of Shumaker  Williams,  P.C. re:  legality of
          the ACNB Corporation Common Stock being registered.

   8      Form of Opinion of Shumaker Williams, P.C. re: Tax Matters.

  10      Executed  Employment  Agreement  dated as of 
          January 1, 1998, between  Adams County  National  Bank,
          ACNB  Corporation  and Ronald L. Hankey.
          (Incorporated by reference to Exhibit 99 of
          ACNB  Corporation's  Current Report on Form 8-K filed
          with the Commission on March 25, 1998.)

  11      Statement re: Computation of Per Share Earnings.
          (Included at page [11] of the Joint  Proxy  Statement/
          Prospectus  contained herein.)

  12      Statement  re:   Computation  of  Ratios.   (Incorporated
          by reference to Exhibit 11 to  Registrant's  Quarterly
          Report on Form 10-Q for the quarter ended June 30, 1998,
          filed with the Commission on August 6, 1998.)

  13      Annual Report of ACNB  Corporation  (Incorporated by
          reference to Exhibit 13, of Registrant's Annual Report on
          Form 10-K, for the year ended December 31, 1997, filed with
          the Commission on March 27, 1998.)


                                      II-7

<PAGE>


  21      Subsidiaries of Registrant.

  23.1    Consent of Shumaker Williams, P.C. (included in Exhibit 5).

  23.2    Consent of Garland McPherson & Associates, Inc.

  23.3    Consent of Greenawalt & Company, P.C.

  23.4    Consent of Stambaugh o  Ness, P.C.

  24      Power of Attorney.  (Included on Signature Page.)

  99.1    Form of Farmers Bancorp, Inc. Proxy.

  99.2    Letter to Shareholders of Farmers Bancorp,
          Inc.  (Included in Proxy Statement contained herein.)

  99.3    Notice of  Meeting.  (Included in Proxy Statement
          contained herein.)

  99.4   Statute Relating to Dissenters'  Rights. 
         (Included as Annex C to the Proxy Statement contained
         herein.)


                            SHUMAKER WILLIAMS, P.C.
                            3425 SIMPSON FERRY ROAD
                         CAMP HILL, PENNSYLVANIA 17108
                                 (717) 763-1121


                                                 November 11, 1998


Board of Directors
ACNB Corporation
675 Old Harrisburg Road
Gettysburg, PA 17325

                  RE:      Registration Statement on Form S-4
                           Our File No. 742-98

Ladies/Gentlemen:

         In  connection  with the proposed  offering of up to 561,968  shares of
common  stock,  par  value  $2.50  per  share  (the  "Common  Stock"),  by  ACNB
Corporation (the "Company"),  covered by the Company's Registration Statement on
Form S-4 (the  "Registration  Statement") filed with the Securities and Exchange
Commission  under the  Securities  Act of 1933, as amended,  with respect to the
Common Stock, we, as special counsel to the Company, have reviewed:

         1.       Articles of Incorporation of the Company;

         2.       The Bylaws of the Company;

         3.       Resolutions  adopted by the Board of  Directors of the Company
                  relating  to  the  Registration  Statement,  certified  by the
                  Secretary of the Company;

         4.       The Registration Statement; and

         5.       Copies of the certificates representing shares of the 
                  Common Stock.


<PAGE>

         Based on our review of the foregoing, it is our opinion that:

          a.   The  Company  has been  duly  incorporated  under the laws of the
               Commonwealth of Pennsylvania  and is validly existing and in good
               standing under the laws of the Commonwealth; and

          b.   The Common Stock covered by the  Registration  Statement has been
               duly  authorized and, when issued pursuant to the terms described
               in the  Registration  Statement,  will be  legally  issued by the
               Company and fully paid and non-assessable.

     We consent to the filing of this opinion as an exhibit to the  Registration
Statement and the reference to us in the related Proxy Statement/Prospectus.  In
giving this consent, we do not thereby admit that we come within the category of
persons whose consent is required under Section 7 of the Securities Act of 1933,
as  amended,  or the  rules  and  regulations  of the  Securities  and  Exchange
Commission thereunder.

                                             Very truly yours,



                                             /s/Shumaker Williams, P.C.
                                             --------------------------
                                             SHUMAKER WILLIAMS, P.C.





Board of Directors                               Board of Directors
ACNB Corporation                                 Farmers National Bancorp, Inc.
675 Old Harrisburg Road                          One West Big Spring Avenue
Gettysburg, Pennsylvania 17325                   Newville, Pennsylvania 17241


                  Re:      Merger of ACNB North, Inc., a Subsidiary of
                           ACNB Corporation, Inc., with and into
                           Farmers National Bancorp, Inc.

Dear Members of the Boards:

     You have  asked  for our  opinion  regarding  certain  federal  income  tax
consequences of the merger of ACNB North, Inc. (the "Corporation") with and into
Farmers National Bancorp, Inc. (the "Surviving  Corporation")  pursuant to which
the  shareholders of the Surviving  Corporation will receive voting common stock
of the Corporation's parent, ACNB Corporation (the "Holding Company").

     In rendering our opinion, we have examined and relied upon the accuracy and
completeness of the facts, information, covenants, and representations contained
in originals or copies,  certified or otherwise  identified to our satisfaction,
of the Agreement and Plan of  Reorganization,  dated as of July 28, 1998,  among
Holding Company,  Corporation,  Surviving Corporation, and Farmers National Bank
of Newville (the "Plan of  Reorganization"),  the ACNB Corporation  Registration
Statement,  Form S-4,  filed with the  Securities  and  Exchange  Commission  on
_________,  1998,  and such  other  documents  as we have  deemed  necessary  or
appropriate  as a basis for the opinion set forth below.  In  addition,  we have
relied upon the facts contained in certain statements and  representations  made
by executives  of Holding  Company and Surviving  Corporation,  including  facts
contained in written  representations  made by executives of Holding Company and
Surviving  Corporation dated as of the date of this opinion. The transactions to
be effected pursuant to the Plan of Reorganization  are hereinafter  referred to
as the "merger transaction".

     In rendering our opinion,  we have  assumed:  (a) that all parties have the
legal  right,  power,  capacity  and  authority to enter into and to perform all
obligations under the Plan of  Reorganization;  (b) the due and proper execution
and delivery of all relevant or necessary  instruments  and  documents;  (c) the
receipt of all federal and state  regulatory  approvals  necessary to consummate
the merger  transaction;  and (d) the satisfaction or proper waiver of any other
conditions under the Plan of Reorganization  so that the merger  transaction may
be consummated. All statements in this letter


<PAGE>


regarding the federal income tax  consequences  of this merger  transaction  are
based upon the Internal  Revenue  Code of 1986,  as amended  (the  "Code"),  the
Treasury  Regulations  promulgated  by the United States  Department of Treasury
(the  "Regulations"),  current  positions of the Internal  Revenue  Service (the
"IRS") as  contained  in  published  Revenue  Rulings  and  Procedures,  current
published administrative positions of the IRS, and existing court decisions, all
as in effect as of this date and each of which is subject to change at any time.

     Our opinion is based upon and assumes the following Factual  Background and
Assumptions relating to the merger transaction:

I.       Factual Background

          A.   Surviving Corporation is a business corporation organized,  under
               the laws of the  Commonwealth of  Pennsylvania,  to engage in the
               business and activities  associated with bank holding  companies.
               Surviving  Corporation  currently  owns  stock  in one  operating
               subsidiary, Farmers National Bank of Newville, a national banking
               association (the "Operating  Subsidiary").  Operating  Subsidiary
               conducts  a  general   commercial   banking  business   embracing
               substantially   all  of  the  traditional   lending  and  deposit
               functions of a nationally  chartered  commercial  bank located in
               Pennsylvania.   Surviving  Corporation  is  authorized  to  issue
               1,000,000  shares of common  stock,  par value Fifty Cents ($.50)
               per share,  of which on December  31, 1997,  248,000  shares were
               issued  and  outstanding  (the  "Surviving   Corporation   Common
               Stock"). The Surviving Corporation Common Stock is the only class
               of security, authorized or outstanding, of Surviving Corporation.
               Surviving Corporation has approximately _______ shareholders. The
               Surviving  Corporation Common Stock is not publicly traded in any
               established  market and,  therefore,  no price quotes are readily
               available. Recent sales of the Surviving Corporation Common Stock
               have  occurred  solely  between  individuals  in limited over the
               counter   transactions  and  in  direct,   privately   negotiated
               transactions.   The  most   recent   sale  prior  to  the  public
               announcement  of  the  merger  on  July  28,  1998,  as to  which
               management of Surviving  Corporation is aware of the sales price,
               occurred on July 27, 1998,  at a price  of___________  Dollars ($
               .00) per share.

          B.   Corporation is a business corporation organized under the laws of
               the Commonwealth of Pennsylvania. Corporation is organized solely
               to engage in the merger transaction. Corporation is authorized to
               issue  10,000,000  shares of common  stock,  par value One Dollar
               ($1.00)  per  share  (the   "Corporation   Common  Stock").   The
               Corporation   Common   Stock  is  the  only  class  of  security,
               authorized or outstanding, of Corporation.

          C.   Holding Company is a business  corporation  organized,  under the
               laws  of the  Commonwealth  of  Pennsylvania,  to  engage  in the
               business and activities  associated with bank holding  companies.
               Holding  Company  is  authorized  to issue  20,000,000  shares of
               common  stock,  par value Two Dollars and Fifty Cents ($2.50) per
               share


<PAGE>

               (the "Holding Company Common Stock").  The Holding Company Common
               Stock is the only class of security,  authorized or  outstanding,
               of Holding Company.  Holding Company will issue 561,968 shares of
               Holding  Company  Common Stock to be exchanged for 248,000 shares
               of  Surviving  Corporation  Common Stock on a 2.266 to 1 basis in
               connection with the merger transaction pursuant to Section 2.1 of
               the Plan of Reorganization.

          D.   In accordance with the Plan of  Reorganization,  Corporation will
               merge with and into  Surviving  Corporation.  Upon the  effective
               date of the  merger:  (a) the  separate  corporate  existence  of
               Corporation will terminate; (b) Surviving Corporation will change
               its name to that of  Corporation;  and (c) Surviving  Corporation
               will  continue,  through  Operating  Subsidiary,  to carry on the
               banking business previously carried on by Surviving  Corporation.
               The approval of  shareholders  owning at least  two-thirds of the
               outstanding stock of Surviving Corporation is required to approve
               the merger.

          E.   Pursuant  to  Section  2.2 of the  Plan  of  Reorganization,  the
               shareholders of Surviving Corporation will be entitled to receive
               2.266 shares of Holding Company Common Stock in exchange for each
               share  of  Surviving   Corporation   Common  Stock  held  by  the
               shareholder on the effective date of the merger.

          F.   Shareholders of Surviving  Corporation who dissent to the merger,
               if any,  will  receive  fair  value for their  shares of stock in
               Surviving  Corporation,  provided they exercise their dissenters'
               rights  as  required  under  the  laws  of  the  Commonwealth  of
               Pennsylvania.

          G.   After  the  consummation  of the  merger  transaction,  Surviving
               Corporation and Holding  Company will file a consolidated  return
               for federal income tax purposes.


II.      Assumptions

          A.   The merger of  Corporation  into Surviving  Corporation,  and the
               operation of Operating Subsidiary as a second-tier  subsidiary of
               Holding Company,  will enable Surviving Corporation to compete in
               the  marketplace  more  effectively as a part of a larger banking
               organization  with more  resources  and a wider range of products
               and services.

          B.   The fair market value of Holding  Company  Common Stock and other
               consideration   received  by  each   shareholder   of   Surviving
               Corporation will be approximately  equal to the fair market value
               of  Surviving   Corporation   Common  Stock  surrendered  in  the
               exchange.

          C.   There is no plan or  intention by the  shareholders  of Surviving
               Corporation who own


<PAGE>

               one percent (1%) or more of Surviving  Corporation  Stock, and to
               the  best  of  the  knowledge  of  the  management  of  Surviving
               Corporation,  there  is no plan or  intention  of the part of the
               remaining shareholders of Surviving Corporation to sell, exchange
               or  otherwise  dispose of a number of shares of  Holding  Company
               Common Stock  received in the  transaction  that would reduce the
               Surviving Corporation  shareholders' ownership of Holding Company
               Common  Stock to a number  of  shares  having a value,  as of the
               effective  date of the  merger  transaction,  of less than  fifty
               percent  (50%) of the  value of all of the  formerly  outstanding
               Surviving  Corporation  Common  Stock  as of the same  date.  For
               purposes  of this  assumption,  shares of  Surviving  Corporation
               Common Stock exchanged for cash or other property, surrendered by
               dissenters or exchanged for cash in lieu of fractional  shares of
               Holding  Company  Common  Stock will be  treated  as  outstanding
               Surviving  Corporation  Common Stock on the effective date of the
               merger  transaction.  Moreover,  shares of Surviving  Corporation
               Common Stock and shares of Holding  Company  Common Stock held by
               Surviving Corporation  shareholders and otherwise sold, redeemed,
               or disposed of prior or  subsequent  to the  transaction  will be
               considered in making this representation.

          D.   Following the merger transaction, Surviving Corporation will hold
               at least ninety percent (90%) of the fair market value of its net
               assets  and at least  seventy  percent  (70%) of the fair  market
               value of its gross assets,  and at least ninety  percent (90%) of
               the fair market  value of  Corporation's  net assets and at least
               seventy  percent (70%) of the fair market value of  Corporation's
               gross assets held  immediately  prior to the merger  transaction.
               For  purposes  of this  assumption,  amounts  paid  by  Surviving
               Corporation  or  Corporation  to  dissenters,   amounts  paid  by
               Surviving  Corporation or Corporation to shareholders who receive
               cash or other property,  amounts used by Surviving Corporation or
               Corporation to pay reorganization  expenses,  and all redemptions
               and distributions (except for regular,  normal dividends) made by
               Surviving  Corporation  will be included  as assets of  Surviving
               Corporation or Corporation,  respectively,  immediately  prior to
               the merger  transaction.  Surviving  Corporation has not redeemed
               any  Surviving   Corporation  Common  Stock,  has  not  made  any
               distribution  with respect to any  Surviving  Corporation  Common
               Stock,  and has not disposed of any of its assets in anticipation
               of or as a part of a plan for the merger transaction.

          E.   Prior  to the  merger  transaction,  Holding  Company  will be in
               control of Corporation within the meaning of Code Section 368(c).

          F.   Surviving   Corporation   has  no  plan  or  intention  to  issue
               additional  shares of its stock that would  result in the Holding
               Company  losing  control  of  Surviving  Corporation  within  the
               meaning of Code Section 368(c).

          G.   Holding  Company has no plan or  intention to redeem or otherwise
               reacquire any of its stock issued in the merger transaction.


<PAGE>

          H.   Holding  Company has no plan or intention to liquidate  Surviving
               Corporation;  to merge Surviving Corporation with or into another
               corporation;  to  sell  or  otherwise  dispose  of the  stock  of
               Surviving   Corporation   except  for   transfers   of  stock  to
               corporations controlled by Holding Company; or to cause Surviving
               Corporation to sell or otherwise  dispose of any of its assets or
               of any of the  assets  acquired  from  Corporation  in the merger
               transaction,  except for dispositions made in the ordinary course
               of business or transfers of assets to a corporation controlled by
               Surviving Corporation.

          I.   Corporation  will  have  no  liabilities   assumed  by  Surviving
               Corporation,  and will not transfer to Surviving  Corporation any
               assets subject to liabilities, in the merger transaction.

          J.   Following  the merger  transaction,  Surviving  Corporation  will
               continue its historic  business or use a  significant  portion of
               its historic business assets in a business.

          K.   Holding  Company,  Corporation,  Surviving  Corporation,  and the
               shareholders of Surviving  Corporation  will pay their respective
               expenses,   if  any,  incurred  in  connection  with  the  merger
               transaction.

          L.   There is no intercorporate  indebtedness existing between Holding
               Company and  Surviving  Corporation  or between  Corporation  and
               Surviving  Corporation  that was issued or  acquired,  or will be
               settled at a discount.

          M.   No two parties to the merger transaction are investment companies
               as defined in Code Section 368(a)(2)(F).

          N.   Surviving Corporation is not under the jurisdiction of a court in
               a Title 11 or similar  case  within the  meaning of Code  Section
               368(a)(3)(A).

          O.   On the  effective  date of the merger  transaction,  the adjusted
               basis  and  fair  market   value  of  the  assets  of   Surviving
               Corporation  will  exceed  the sum of its  liabilities,  plus the
               amount of liabilities, if any, to which the assets are subject.

          P.   In  the  merger  transaction,  shares  of  Surviving  Corporation
               representing  control of  Surviving  Corporation  , as defined in
               Code Section 368(c), will be exchanged solely for voting stock of
               Holding  Company.  For  purposes  of this  assumption,  shares of
               Surviving  Corporation stock exchanged for cash or other property
               originating  with Holding  Company will be treated as outstanding
               Surviving   Corporation   Common   Stock   on  the  date  of  the
               transaction.

          Q.   At the time of the merger transaction, Surviving Corporation will
               not  have   outstanding   any  warrants,   options,   convertible
               securities,  or any  other  type of right  pursuant  to which any
               person could acquire stock in Surviving Corporation that, if


<PAGE>

               exercised   or   converted,   would  affect   Holding   Company's
               acquisition or retention of control of Surviving Corporation,  as
               defined in Code Section 368(c).

          R.   Holding  Company  does not own,  nor has it owned during the past
               five  years,  either  directly or  indirectly,  any shares of the
               stock of Surviving Corporation.

          S.   There is no larger  integrated  transaction  of which the  merger
               transaction constitutes only one step.

          T.   The expenses of the merger  transaction and the amount to be paid
               to  dissenters,  if any, will not exceed ten percent (10%) of the
               fair market value of the net assets of Surviving Corporation.

          U.   There are no fractional  shares of Surviving  Corporation  Common
               Stock  outstanding  and no  fractional  shares  will be issued or
               redeemed in the merger transaction.

          V.   None of the compensation received by any  shareholder-employee of
               Surviving  Corporation  will be  separate  consideration  for, or
               allocable  to, any of their shares of the  Surviving  Corporation
               Common Stock;  none of the shares of the Holding  Company  Common
               Stock  received  by any  shareholder-employee  will  be  separate
               consideration for, or allocable to, any employment agreement; and
               the  compensation  paid to any  shareholder-employee  will be for
               services  actually rendered and will be commensurate with amounts
               paid to third  parties  bargaining  at  arm's-length  for similar
               services.

          W.   There  is no  present  plan  or  intention  to  issue  any of the
               authorized  common  stock of  Holding  Company  in  excess of the
               amounts described in this letter in the merger transaction.

          X.   The  payment  of cash in lieu of  fractional  shares  of  Holding
               Company  Common  Stock is solely for the purpose of avoiding  the
               expense  and  inconvenience  to the  Holding  Company  of issuing
               fractional shares and does not represent separately bargained-for
               consideration.

     Based on the  foregoing  and subject to and  specifically  relying upon the
aforesaid  Factual  Background and Assumptions and other matters herein referred
to, it is our opinion that:

     1.   Provided the merger of Corporation with and into Surviving Corporation
          qualifies as a merger under the applicable federal and state laws, the
          merger of Corporation into Surviving Corporation and the corresponding
          receipt of Holding  Company  Common  Stock by former  shareholders  of
          Surviving  Corporation  will  qualify as a  reorganization  within the
          meaning of Code Section  368(a).  The Holding  Company,  the Surviving
          Corporation,   and  the  Corporation  will  each  be  "a  party  to  a
          reorganization" within the meaning of Code Section 368(b).


<PAGE>

     2.   No  gain or  loss  will  be  recognized  to  either  Holding  Company,
          Surviving  Corporation  or  Corporation  as a result of the  merger of
          Corporation into Surviving  Corporation and the corresponding  receipt
          of Holding  Company Common Stock by former  shareholders  of Surviving
          Corporation.

     3.   No gain or loss will be  recognized to the  shareholders  of Surviving
          Corporation  upon the exchange of their Surviving  Corporation  Common
          Stock solely for the Holding Company Common Stock pursuant to the Plan
          of  Reorganization,  except for that gain or loss which is  recognized
          due to the receipt of cash which is  received in lieu of the  issuance
          of fractional shares of Holding Company Common Stock.

     4.   In  the  case  of  cash  received  by  any  shareholder  of  Surviving
          Corporation  in lieu of the issuance of a fractional  share of Holding
          Company  Common  Stock,  gain  or  loss  will  be  recognized  by such
          shareholder  to the extent of the  difference  between  the amount the
          cash  received  and the adjusted  tax basis of such  fractional  share
          interest.

     5.   The basis of the shares of Holding Company Common Stock to be received
          by the  shareholders of Surviving  Corporation will be the same as the
          basis of the shares of Surviving  Corporation  Common Stock  exchanged
          therefor   (reduced  by  any  amount  allocable  to  fractional  share
          interests for which cash is received).

     6.   The holding  period of the shares of the Holding  Company Common Stock
          to be received  by the  shareholders  of  Surviving  Corporation  will
          include the period during which  Surviving  Corporation  Common Stock,
          surrendered  in exchange  therefor,  was held by the  shareholders  of
          Surviving Corporation, provided the Surviving Corporation Common Stock
          was held as a capital  asset in the hands of the  shareholders  of the
          Corporation at the time of the exchange.

     7.   Subject to conditions  and  limitations  under Code Sections 381, 382,
          383  and  384,   Regulations   corresponding   thereto,   and  certain
          Regulations  promulgated  under Code Section 1502,  where  applicable,
          Surviving  Corporation,  as the acquiring  corporation  in the merger,
          will  carry-over  and take into account all  accounting  items and tax
          attributes, if any, of Corporation.

     Except  as  set  forth  above,   we  express  no  opinion  as  to  the  tax
consequences,  whether  Federal,  state,  local or foreign,  to any party of the
merger  transaction.  The  opinions set forth in this letter are given and based
upon  the  factual  background  and  the  existence  of  the  assumed  facts  as
hereinabove  set forth,  all as of the date of this letter.  Should any facts or
assumptions be otherwise than as hereinabove  set forth or change after the date
of this letter,  no opinion is made or expressed  with respect  thereto or as to
the  legal,  tax or other  consequences  thereof.  We make no and  disclaim  any
opinion  as to any facts  occurring  after the date of this  letter or as to the
legal,  tax  or  other  consequences   thereof.   We  assume  no  obligation  to
investigate,  research  or  determine  any facts or laws,  rules or  regulations
occurring,  existing  or in  effect  after  the date  hereof,  or to  update  or
supplement  any of the  opinions  herein  expressed  to  reflect  any  facts  or
circumstances  or  changes  in law  that  hereafter  may  occur  or  come to our
attention.


<PAGE>


     Holding Company,  Corporation and Surviving  Corporation may rely upon this
opinion letter.  No other person,  whether  natural or otherwise,  may rely upon
this opinion  letter,  and it may not be disclosed to any other persons  without
our prior written consent.

                                                Sincerely,

                                                SHUMAKER WILLIAMS, P.C.


                                                  Jurisdiction
                                                       of
      Subsidiary                                  Incorporation
     -----------                                  -------------

     Adams County National Bank              United States of America

     ACNB North, Inc.                        Pennsylvania



                CONSENT OF GARLAND McPHERSON & ASSOCIATES, INC.

     We hereby  consent to the  inclusion of our opinion  letter to the Board of
Directors of Farmers  National  Bancorp,  Inc. (the "Company") as Annex B to the
Joint Proxy Statement/Prospectus  relating to the proposed merger of the Company
with and into ACNB North,  Inc., a subsidiary of ACNB Corporation,  contained in
the Registration  Statement on Form S-4, dated as of the date hereof, and to the
references to our firm and such opinion in the Joint Proxy Statement/Prospectus.
In giving our  consent,  we do not admit that we come  within  the  category  of
persons whose consent is required under Section 7 of the Securities Act of 1933,
as amended (the  "Act"),  or the rules and  regulations  of the  Securities  and
Exchange Commission thereunder (the "Regulations"),  nor do we admit that we are
experts  with  respect  to any part of the  Registration  Statement  within  the
meaning of the term "experts" as used in the Act or the Regulations.


                                           /s/ Garland McPherson & Associates  
                                           -----------------------------------  
October 15, 1998                           Garland McPherson & Associates, Inc.
Hatfield, Pennsylvania



                                                                Exhibit 23.3

                           GREENAWALT & COMPANY, P.C.
                          Certified Public Accountants
                                  P. O. Box 6
                                400 West Street
                       Mechanicsburg, Pennsylvania 17055
                                 (717) 766-4763
                              Fax: (717) 766-2731


                         INDEPENDENT AUDITORS' CONSENT
                         -----------------------------

     We hereby  consent to the inclusion in the  Registration  Statement on Form
S-4 of ACNB  Corporation,  filed with the  Commission  in  connnection  with the
registration  of 561,968 shares of common stock,  par value $2.50 per share,  of
our report,  dated January 8, 1998,  except for Note 20, as to which the date is
September  23,  1998,  relating to the  consolidated  balance  sheets of Farmers
National Bancorp,  Inc. and subsidiary as of December 31, 1997 and 1996, and the
related consolidated  statements of income,  changes in shareholders' equity and
cash flows for each of the three years in the period ended December 31, 1997. We
also  consent to the  reference  to our firm under the caption  "Experts" in the
Proxy Statement/Prospectus.



                                        /s/ Greenawalt & Company, P.C.
                                        --------------------------------
                                        GREENAWALT & COMPANY, P.C.

October 12, 1998
Mechanicsburg, Pennsylvania



                          INDEPENDENT AUDITOR'S CONSENT


         We hereby consent to the incorporation by reference in the Registration
Statement on Form S-4 of ACNB  Corporation  (the  "Registrant"),  filed with the
Commission  in  connection  with the  registration  of 561,968  shares of common
stock,  par value  $2.50 per share,  of our  report,  dated  January  12,  1998,
relating to the  consolidated  statements  of  condition of the  Registrant  and
subsidiary  as of  December  31,  1997 and 1996,  and the  related  consolidated
statements of income,  stockholders' equity and cash flows for each of the years
in the three  year  period  ended  December  31,  1997.  We also  consent to the
reference   to  our   firm   under   the   caption   "Experts"   in  the   Proxy
Statement/Prospectus.



October 12, 1998                                    Stambaugh Ness, P.C.
York, Pennsylvania




FARMERS BANCORP, INC.

                                      PROXY

         SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 15, 1998
           THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

     The undersigned  hereby  constitutes  and appoints Lynn E. Zeigler,  and J.
Glenn Glesner,  and each or any of them,  proxies of the undersigned,  with full
power of substitution,  to vote all of the shares of Farmers Bancorp,  Inc. (the
"Company")  that the  undersigned may be entitled to vote at the Special Meeting
of  Shareholders  of  the  Company  to  be  held  at  One  West  Spring  Avenue,
Pennsylvania on Tuesday,  December 15, 1998, commencing at 2:00 p.m., prevailing
time, and at any adjournment or postponement thereof, as follows:

1.       PROPOSAL TO APPROVE AND ADOPT THE AGREEMENT AND PLAN OF
         REORGANIZATION.

         [  ] FOR          [  ] AGAINST             [  ] ABSTAIN

         The Board of Directors recommends a vote FOR this proposal.


2.       PROPOSAL TO POSTPONE OR ADJOURNM  THE SPECIAL  MEETING TO ANOTHER  TIME
         AND/OR PLACE FOR THE PURPOSE OF SOLICITING  ADDITIONAL  PROXIES, IN THE
         EVENT THAT THERE ARE NOT  SUFFICIENT  VOTES AT THE TIME OF THE  SPECIAL
         MEETING TO APPROVE AND ADOPT THE AGREEMENT  AND PLAN OF  REORGANIZATION
         OR TO CONSTITUTE A QUORUM.

         [  ] FOR          [  ] AGAINST             [  ] ABSTAIN

         The Board of Directors recommends a vote FOR this proposal.


<PAGE>

3.       In their discretion, the proxies are authorized to vote upon such other
         business as may properly come before the meeting and any adjournment or
         postponement thereof.

     THIS PROXY,  WHEN  PROPERLY  SIGNED,  WILL BE VOTED IN THE MANNER  DIRECTED
HEREIN BY THE UNDERSIGNED SHAREHOLDER.  IF NO DIRECTION IS MADE, THIS PROXY WILL
BE VOTED FOR PROPOSAL 1 AND FOR PROPOSAL 2.

                                                     Dated:             , 1998



                                                     Signature of Shareholder



                                                     Signature of Shareholder


Number of Shares Held of Record on ____ __, 1998:


     THIS PROXY MUST BE DATED,  SIGNED BY THE SHAREHOLDER AND RETURNED  PROMPTLY
TO THE  CORPORATION  IN THE  ENCLOSED  ENVELOPE.  WHEN  SHARES ARE HELD BY JOINT
TENANTS,  BOTH SHOULD SIGN. WHEN SIGNING AS ATTORNEY,  EXECUTOR,  ADMINISTRATOR,
TRUSTEE OR GUARDIAN,  PLEASE GIVE FULL TITLE AS SUCH.  IF MORE THAN ONE TRUSTEE,
ALL SHOULD SIGN.  IF A  CORPORATION,  PLEASE SIGN IN  FULLCORPORATE  NAME BY THE
PRESIDENT OR AUTHORIZED  OFFICER.  IF A PARTNERSHIP,  PLEASE SIGN IN PARTNERSHIP
NAME BY AUTHORIZED PERSON.



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