DONALDSON CO INC
DEF 14A, 1998-10-14
INDUSTRIAL & COMMERCIAL FANS & BLOWERS & AIR PURIFING EQUIP
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                                  SCHEDULE 14A
                                 (RULE 14a-101)
                     INFORMATION REQUIRED IN PROXY STATEMENT
                            SCHEDULE 14A INFORMATION

                PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE
                SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )

Filed by the registrant [X]

Filed by a party other than the registrant [ ]

Check the appropriate box: 
[ ]  Preliminary proxy statement 
[X]  Definitive proxy statement 
[ ]  Definitive additional materials 
[ ]  Soliciting material pursuant to Rule 14a-11(c) or Rule 14a-12 
[ ]  Confidential, for Use of the Commission Only (as permitted by Rule 
     14a-6(e)(2))

                             DONALDSON COMPANY, INC.
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified in Its Charter)


                                      
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):  

[X] No fee required
[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11. 

     (1)  Title of each class of securities to which transaction applies:

     (2)  Aggregate number of securities to which transactions applies:

     (3)  Per unit price or other underlying value of transaction computed
          pursuant to Exchange Act Rule 0-11. (Set forth the amount on which the
          filing fee is calculated and state how it was determined.)

     (4)  Proposed maximum aggregate value of transaction:

     (5)  Total fee paid: 

[ ]  Fee paid previously with preliminary materials.
[ ]  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2) and identify the filing for which the offsetting fee was paid
     previously. Identify the previous filing by registration statement number,
     or the Form or Schedule and the date of its filing.

     (1)  Amount previously paid:

     (2)  Form, Schedule or Registration Statement No.:

     (3)  Filing party:

     (4)  Date filed:

<PAGE>


                                   [LOGO](TM)
                                  DONALDSON(R)


                             DONALDSON COMPANY, INC.


                                    NOTICE OF
                         ANNUAL MEETING OF STOCKHOLDERS


TIME:           10:00 a.m., central time, Friday, November 20, 1998

PLACE:          The Conference Center at Atrium Center, 3105 E. 80th Street,
                Bloomington, Minnesota.

ITEMS OF        (1) Election of three directors;
BUSINESS:
                (2) Approval of appointment of Ernst & Young LLP as independent
                    auditors of the Company;

                (3) Amendment of the Company's 1991 Master Stock Compensation
                    Plan; and

                any other business that properly comes before the meeting.

RECORD DATE:    Stockholders of record at the close of business on September 25,
                1998 are entitled to notice of and to vote at the meeting or any
                adjournment. A list of such stockholders will be available prior
                to the meeting at the office of the Company, 1400 West 94th
                Street, Minneapolis, Minnesota for examination by any such
                stockholder for any purpose germane to the meeting.


                                              By Order of the Board of Directors

                                              Norman C. Linnell
                                              SECRETARY

                Dated: October 14, 1998


- --------------------------------------------------------------------------------
                                    IMPORTANT

STOCKHOLDERS ARE ENCOURAGED TO VOTE THEIR PROXY BY TELEPHONE AS DESCRIBED IN THE
ENCLOSED TELEPHONE VOTING INSTRUCTIONS OR DATE, SIGN AND RETURN THE ENCLOSED
PROXY IN THE ENCLOSED ENVELOPE, TO WHICH NO POSTAGE NEED BE AFFIXED IF MAILED IN
THE UNITED STATES.

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

<PAGE>


                             DONALDSON COMPANY, INC.
                              1400 WEST 94TH STREET
                          MINNEAPOLIS, MINNESOTA 55431


                          -----------------------------
                                 PROXY STATEMENT
                          MAILING DATE OCTOBER 14, 1998
                          -----------------------------

SOLICITATION OF PROXIES

     The enclosed proxy is solicited by and on behalf of the Board of Directors
of Donaldson Company, Inc. (the "Company") for use at the Annual Meeting of
Stockholders to be held on November 20, 1998, and at any adjournments thereof.
The person signing a proxy may revoke it any time before it is exercised. Each
valid proxy received prior to the meeting will be voted according to the
stockholder's directions. If no direction is given, such proxies will be voted
in favor of (1) the nominees for directors identified herein, (2) approving the
auditors named herein, and (3) approving the amendment to the 1991 Master Stock
Compensation Plan described herein.

     The cost of this solicitation of proxies will be borne by the Company. In
addition to solicitation of proxies by the use of the mails, there may be
incidental personal solicitations by telephone, special communications or in
person, by officers, directors and regular employees of the Company who will not
receive additional compensation therefor. The Company will reimburse banks,
brokerage firms and other nominees, custodians and fiduciaries for reasonable
expenses incurred by them in sending proxy materials and annual reports to the
beneficial owners of stock. The Company has engaged Morrow & Co., Inc. to assist
in proxy solicitation for an estimated fee of $5,000 plus out-of-pocket
expenses. This proxy statement and the accompanying proxy are first being mailed
to stockholders on or about October 14, 1998.

VOTING SECURITIES

     Stockholders of record as of the close of business on September 25, 1998
will be entitled to vote at the meeting. The Company then had approximately
47,587,174 shares of Common Stock outstanding, each of which entitles its holder
to one vote. Representation at the meeting of a majority of the outstanding
shares is required for a quorum.

     If an executed proxy card is returned and the stockholder has abstained
from voting on any matter or, in the case of the election of directors has
withheld authority to vote with respect to any or all of the nominees, the
shares represented by such proxy will be considered present at the meeting for
purposes of determining a quorum and for purposes of calculating the vote, but
will not be considered to have been voted in favor of such matter or, in the
case of the election of directors, in favor of such nominee or nominees. If an
executed proxy is returned by a broker holding shares in street name which
indicates that the broker does not have discretionary authority as to certain
shares to vote on one or more matters, such shares will be considered present at
the meeting for purposes of determining a quorum, but will not be considered to
be represented at the meeting for purposes of calculating the vote with respect
to such matter.

     Shares of Common Stock credited to the accounts of participants in the
Automatic Dividend Reinvestment Program of the Company have been added to the
participants' other holdings and included in the enclosed proxy. Participants in
the Company's employee benefit plans are entitled to instruct the plan trustee
as to how to vote all shares of Donaldson Common Stock allocated to their
accounts under the plans as of the record date, and will receive a separate
voting instruction card for directing the plan trustee to vote such shares.


                                        1

<PAGE>


                               SECURITY OWNERSHIP

     Set forth below is information regarding persons known by the Company to
own beneficially more than 5% of the outstanding Common Stock of the Company
based on the number of shares of Common Stock outstanding on September 25, 1998:

      NAME AND ADDRESS                             AMOUNT AND NATURE    PERCENT
      OF BENEFICIAL OWNER                       OF BENEFICIAL OWNERSHIP OF CLASS
      -------------------                       ----------------------- --------

      Donaldson Company, Inc.
      Employee Stock Ownership Plan ...........      5,831,138(1)        12.3%
       c/o Fidelity Management Trust Company
       82 Devonshire Street
       Boston, MA 02109

      Pioneering Management Corporation .......      4,942,200(2)        10.4%
       60 State Street
       Boston, MA 02109

- ------------------
(1)  These shares are held in trust for the benefit of participants in the
     Company's ESOP for which Fidelity Management Trust Company is the trustee
     and claims no voting or investment power over the indicated shares.

(2)  Pioneering Management Corporation is a registered investment adviser with
     sole voting power with respect to all 4,942,200 shares and shared
     investment power with respect to all 4,942,200 shares. Information is based
     solely on a Schedule 13G filed with the Securities and Exchange Commission
     by Pioneering Management Corporation with respect to shares held as of
     December 31, 1997.

The following table sets forth information as of July 31, 1998, regarding the
beneficial ownership of the Company's Common Stock by each director, each of the
Named Officers (as hereinafter defined) and all executive officers and directors
of the Company as a group. Except as otherwise indicated, the named beneficial
owner has sole voting and investment power with respect to the shares held by
such beneficial owner.

                                                 TOTAL     PERCENT   EXERCISABLE
      NAME OF INDIVIDUAL OR GROUP              SHARES(1)   OF CLASS   OPTIONS(1)
      ---------------------------              ---------   --------  -----------

      William G. Van Dyke ...................    821,062      1.7      454,736
      Nickolas Priadka ......................    244,077       *       119,011
      William M. Cook .......................     99,937       *        50,017
      James R. Giertz .......................    138,463       *        61,324
      Lowell F. Schwab ......................     76,454       *        36,808
      Kendrick B. Melrose ...................     43,128       *        20,000
      S. Walter Richey ......................     44,233       *        20,000
      Stephen W. Sanger .....................     36,379       *        20,000
      Jack W. Eugster .......................     31,209       *        16,000
      F. Guillaume Bastiaens ................     13,572       *         8,000
      Paul B. Burke .........................      8,843       *         4,000
      Janet M. Dolan ........................      7,608       *         4,000
      John Grundhofer .......................      3,228       *             0
      Directors and Officers as a Group .....  1,744,646      3.7      914,584

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

*    Less than 1%

(1)  Includes restricted shares, shares held in trust and the shares underlying
     options exercisable within 60 days, as listed under the Exercisable Options
     column. The total shares for Mr. Van Dyke includes 8,256 shares held by his
     spouse.


                                        2

<PAGE>


                              ELECTION OF DIRECTORS

     The Bylaws of the Company provide that the Board of Directors shall consist
of not less than three nor more than 15 directors and that the number of
directors may be fixed from time to time by the affirmative vote of a majority
of the directors. At its meeting of November 21, 1997, the Board of Directors
fixed the number of directors constituting the entire Board at nine. Vacancies
and newly created directorships resulting from an increase in the number of
directors may be filled by a majority of the directors then in office and the
directors so chosen will hold office until the next election of the class for
which such directors shall have been chosen and until their successors are
elected and qualified. Directors are elected for a term of three years with
positions staggered so that approximately one-third of the directors are elected
at each annual meeting of the stockholders. The terms of Paul B. Burke, Kendrick
B. Melrose and Stephen W. Sanger expire at the annual meeting. Mr. Burke was
elected by the Board in 1996, Mr. Melrose in 1991 and Mr. Sanger in 1992. It is
intended that proxies received will be voted, unless authority is withheld, FOR
the election of the nominees presented on Page 4, namely Paul B. Burke, Kendrick
B. Melrose and Stephen W. Sanger. The election of each nominee requires the
affirmative vote of the holders of a plurality of the shares cast in the
election of directors.

     The Board of Directors meets on a regularly scheduled basis. During the
past fiscal year, the Board held six meetings. Each director attended at least
75% of the aggregate of the Board meetings and meetings of Board committees on
which each served, with the exception of Mr. Burke who attended 67%.

     The Board of Directors has assigned certain responsibilities to standing
committees. The Audit Committee is composed of directors F. Guillaume Bastiaens,
Janet M. Dolan, Kendrick B. Melrose, S. Walter Richey (Chairperson) and Stephen
W. Sanger, all of whom are non-employee directors. The Audit Committee held
three meetings during the past fiscal year. Functions of the Audit Committee
include: recommending to the Board of Directors independent public auditors for
the Company, reviewing the scope and results of the auditors' examination, and
reviewing the internal audit program, adequacy of internal controls, and
adherence to applicable legal, ethical and regulatory requirements.

     The Human Resources Committee is composed of directors Paul B. Burke, Jack
W. Eugster, John F. Grundhofer, Kendrick B. Melrose and Stephen W. Sanger
(Chairperson), all of whom are non-employee directors. This Committee held two
meetings during the past fiscal year. The functions of this committee include
review of management development, approval of compensation arrangements for
senior management and the directors and administration of the Company's stock
compensation plans.

     The Committee on Directors' Affairs is composed of directors Paul B. Burke,
Janet M. Dolan, Jack W. Eugster (Chairperson), John F. Grundhofer and S. Walter
Richey, all of whom are non-employee directors. This Committee held one meeting
during the past fiscal year. The Committee's duties are to review the
organization of the Board and its committees, propose to the Board a slate of
directors for election by the stockholders at each Annual Meeting and propose
candidates to fill vacancies on the Board. The Committee will consider nominees
for director recommended by stockholders. Recommendations should be addressed to
the Secretary, Donaldson Company, Inc., P.O. Box 1299, Minneapolis, MN 55440.
Any proposal by a stockholder for the nomination of a candidate for director at
the annual meeting for the election of directors is required by the Company's
Bylaws to be submitted in writing to the Secretary and received at the principal
executive offices of the Company not less than 60 days nor more than 90 days
prior to the date of the annual meeting.

     The Board of Directors has no reason to believe that any nominees will be
unavailable or unable to serve, but in the event any nominee is not a candidate
at the meeting, the persons named in the enclosed proxy intend to vote in favor
of the remaining nominees and of such other person, if any, as they may
determine.


                                        3

<PAGE>


     The table below and on the following page sets forth additional information
with respect to each nominee for election as a director and each other person
whose term of office as a director will continue after the meeting.

                              NOMINEES FOR ELECTION

<TABLE>
<CAPTION>
NAME                                       PRINCIPAL OCCUPATION AND BUSINESS EXPERIENCE
- ----                      -------------------------------------------------------------------------------
<S>                       <C>                                                             
FOR A TERM EXPIRING IN 2001:

 Paul B. Burke            Chairman (1995), President and Chief Executive Officer of BMC Industries,
   Age - 42               Inc. (manufacturer of precision imaged and optical products).
   Director Since 1996

 Kendrick B. Melrose      Chairman and Chief Executive Officer of The Toro Company (manufacturer
   Age - 58               of outdoor maintenance products). Also, a director of Jostens, Inc., SurModics,
   Director since 1991    Inc. and The Valspar Corporation.

 Stephen W. Sanger        Chairman and Chief Executive Officer of General Mills, Inc. (1995) (consumer
   Age - 52               products and services). Previously, an executive officer of various groups
   Director since 1992    and divisions of General Mills, Inc. Also, a director of The Dayton Hudson
                          Corporation.

<CAPTION>
                         DIRECTORS CONTINUING IN OFFICE

FOR A TERM EXPIRING IN 2000:

 Jack W. Eugster          Chairman, President and Chief Executive Officer of The Musicland Group,
   Age - 53               Inc. (retail consumer products). Also, a director of Damark, Inc., Jostens,
   Director since 1993    Inc., MidAmerican Energy Company and Shopko Stores, Inc.

 William G. Van Dyke      Chairman and Chief Executive Officer (1996) and President (1994) of the
   Age - 53               Company. Previously, Executive Vice President. Also, a director of Graco
   Director since 1994    Inc.

 John F. Grundhofer       Chief Executive Officer and President of U.S. Bancorp (financial services).
   Age - 59               Also, a director of U.S. Bancorp, a trustee of Minnesota Mutual Life
   Director since 1997    Insurance Company and a trustee of Irvine Apartment Communities, Inc.

<CAPTION>
                         DIRECTORS CONTINUING IN OFFICE

NAME                                       PRINCIPAL OCCUPATION AND BUSINESS EXPERIENCE
- ----                      -------------------------------------------------------------------------------

TERMS EXPIRING IN 1999:

 F. Guillaume Bastiaens   Vice Chairman (1997) and President, Food Sector of Cargill, Inc.
   Age - 55               (Agribusiness). Previously, Executive Vice President of Cargill, Inc.
   Director Since 1995

 Janet M. Dolan           President and Chief Operating Officer (1998) of Tennant Company
   Age - 49               (manufacturer of floor maintenance equipment and coating products).
   Director Since 1996    Previously, Executive Vice President of Tennant Company. Also, a director
                          of William Mitchell College of Law.

 S.Walter Richey          Retired Chairman, President and Chief Executive Officer of Meritex, Inc.
   Age - 62               and its predecessor corporation Space Center Company (owns and manages
   Director Since 1991    business properties and distribution centers). Also, a director of U.S.
                          Bancorp and a member of the Board of Overseers of the Curtis L. Carlson
                          School of Management at the University of Minnesota.
</TABLE>


                                        4

<PAGE>


DIRECTOR COMPENSATION

     Directors who are not employees receive a retainer fee of $20,000 annually
and are paid $1,000 for each Board or Committee meeting attended. Committee
Chairs receive an additional annual retainer of $2,500. Pursuant to the
Company's Compensation Plan for Non-Employee Directors, any non-employee
director may elect, prior to each year of their term, to defer all or part of
his or her director compensation received during the upcoming year. Each
participating director is entitled to a Company credit on the balance in his or
her deferral account at the ten-year Treasury Bond rate plus 2%. The deferral
election must also specify the manner for distribution of the deferral balance.

     The 1991 Master Stock Compensation Plan, as amended (the "Plan"), provides
for non-employee directors to be credited with shares to a deferred stock
account in lieu of 30% of the annual retainer for services as a Director to be
rendered in the following service year. The Plan also allows a director to elect
to receive a credit of shares to a deferred stock account in lieu of all or part
of the remaining retainer and meeting fees. The Company contributes an amount
equal to the deferred stock accounts to a trust and the trust purchases shares
of Donaldson Common Stock. Each director is entitled to direct the trustee to
vote all shares allocated to the director's account in the trust. The Common
Stock will be distributed to each director following the director's retirement
from the Board pursuant to the director's deferral payment election. The trust
assets remain subject to the claims of the Company's creditors. The trust
becomes irrevocable in the event of a "Change in Control" as defined under the
Plan.

     The Company's Non-Qualified Stock Option Program for Non-employee Directors
provides for the automatic grant of a non-qualified stock option for 3,600
shares of Common Stock to each non-employee Director of the Company who is a
member of the Board on December 1 each year. The exercise price of such options
is the closing price of Common Stock in consolidated trading on the first
business day of December in the respective year. The options vest annually
beginning on the first anniversary in three equal installments and have a term
of ten years. The option also includes a "reload option" granted at the time of
exercise of the original option for the number of shares equal to the shares
used in payment of the purchase price. The one-time reload option feature is
similar to that included in the option grants to officers.

     Donaldson's non-qualified pension plan for non-employee director's was
eliminated effective May 21, 1998. When the plan was eliminated, each director
continuing in office received a credit of shares to a deferred stock account
under the 1991 Master Stock Compensation Plan equal to 115% of the dollar value
of the amount accrued by the Company for each director's pension benefit. The
Board of Directors considered the value of the annual benefits eliminated
through the termination of the pension plan in its approval of an increase in
the annual retainer from $18,000 to $20,000, the increase in the annual stock
option grant from 2,000 shares to 3,600 shares together with the addition of the
one time "reload option" feature, as described above.

     Restricted stock awards and shares credited to deferred stock accounts to
non-employee directors under the 1991 Master Stock Compensation Plan in fiscal
1998, including the one-time grant for the termination of the pension plan, were
as follows: Bastiaens, 2,052 shares, Burke, 1,489 shares, Dolan, 1,978 shares,
Eugster, 3,853 shares, Grundhofer, 1,228 shares, Melrose, 4,534 shares, Richey,
4,781 shares, and Sanger, 4,203 shares.


                                        5

<PAGE>


                              INDEPENDENT AUDITORS

     Upon recommendation of its Audit Committee, the Board of Directors has
appointed Ernst & Young LLP as independent public accountants to audit the books
and accounts of the Company for the fiscal year ending July 31, 1999, such
appointment to continue at the pleasure of the Board of Directors and subject to
ratification by the stockholders. Ernst & Young LLP has audited the books and
accounts of the Company since 1951. Representatives of Ernst & Young LLP are
expected to be present at the meeting with the opportunity to make a statement
and to respond to appropriate questions. In the event this appointment is not
ratified, the Board will appoint other independent auditors for the subsequent
fiscal year.

     The Board of Directors recommends that stockholders vote FOR ratification
of the appointment of Ernst & Young LLP as independent auditors for the fiscal
year ending July 31, 1999.

            PROPOSAL TO AMEND THE 1991 MASTER STOCK COMPENSATION PLAN

     The Board of Directors recommends stockholder approval of the proposed
amendment to the Donaldson Company, Inc. Master Stock Compensation Plan (the
"Plan") under which the Company offers shares of its Common Stock and options to
purchase shares of its Common Stock to key employees of the Company.

PROPOSAL

     In July of 1998, the Board of Directors approved an amendment to the Plan,
subject to shareholder approval, relating to Section 162(m) of the Internal
Revenue Code of 1986, as amended (the "Code"). Section 162(m) of the Code
generally disallows a tax deduction to publicly held companies for compensation
exceeding $1 million paid to a corporation's Chief Executive Officer and four
other most highly compensated executive officers. Qualifying performance-based
compensation will not be subject to the deduction limit if certain requirements
are met. A large part of the Company's executive officers' compensation which
could exceed the $1 million limitation is associated with stock options. The
Company proposes to amend the Plan by adding a new Section 2.10 as follows:

          SECTION 2.10 OPTION AND AWARD LIMITATIONS UNDER THE PLAN. No
          Participant under this Plan may be granted an option or
          Award (or options or Awards), the value of which is based
          solely on an increase in the value of the Common Stock after
          the date or dates of grant of such option or Award (or
          options or Awards), for more than 500,000 shares of Common
          Stock (subject to adjustment as provided in Section 1.05),
          in the aggregate, in any single calendar year. The foregoing
          annual limitation specifically includes the grant of any
          options or Awards representing qualified performance-based
          compensation within the meaning of Section 162(m) of the
          Internal Revenue Code.

     If certain other requirements are satisfied, limiting the number of options
and awards that may be granted in any calendar year will allow the Company to
continue to deduct the compensation attributable to options granted under the
Plan in calculating its tax liability.

     The amendment to limit the number of options and certain other awards under
the Plan that may be made to any employee in any calendar year is necessary in
order to allow the Company to deduct fully certain compensation to executive
officers attributable to such options or awards. Under Section 162(m) of the
Code, one of the requirements for certain executive compensation related to
options or certain other awards under the Plan to be "qualified
performance-based compensation" not subject to the $1,000,000 cap, is that the
Company must place a shareholder approved limit on the number of shares subject
to awards that may be granted to an employee during any calendar year under the
Plan. The Board of Directors believes that it is important for the Company to
take all steps reasonably necessary to ensure that the Company will be able to
take all available tax deductions with respect to compensation resulting from
stock options and certain other awards made under the Plan.

     The full text of the Plan appears as Exhibit A to this Proxy Statement. The
summary of the principal features which follows is qualified entirely by
reference to the full text.

GENERAL

     The Plan permits the granting of a variety of stock based awards to
facilitate formulation of effective incentive arrangements. The Plan became
effective on November 15, 1991 and will remain in full force and


                                        6

<PAGE>


effect until December 31, 2001, unless earlier terminated. The Plan is not
subject to the provisions of the Employee Retirement Income Security Act of
1974.

     The Plan contemplates granting awards under two separate parts to separate
groups of participants. Employee Awards are limited to employees of the Company
or its majority owned subsidiaries (including officers and employee directors).
Nonemployee Director Awards are limited to members of the Board of Directors of
the Company who are not full time employees. The selection of participants is
solely within the discretion of a subcommittee of the Human Resources Committee
of the Board of Directors (the "Committee").

     Subject to adjustment as described below, the number of shares of the
Company's Common Stock available for granting awards under the Plan in any
calendar year shall not exceed 1.5 percent (the "Limitation Amount") of the
outstanding shares of the Company's Common Stock, Common Stock equivalents and
treasury shares as of the end of the fiscal year ending in such calendar year.

     If certain events occur, the Committee may adjust awards to prevent the
dilution or enlargement of the benefits available under the Plan. These events
include, but are not limited to the following: dividend or other distribution;
recapitalization; stock split or reverse stock split; reorganization; merger;
consolidation; spin-off; repurchase or exchange of shares or other securities of
the Company; the exercisability of stock purchase rights issued under the Rights
Plan; the issuance of warrants or other rights to purchase shares or other
securities of the Company and other similar events.

EMPLOYEE AWARDS

     Employee Awards are in the form of grants of options to purchase Common
Stock, SARs, restricted stock, other stock-based awards and dollar-denominated
awards. In addition, dividend equivalents may be awarded in respect of all
employee awards.

     The exercise price per share of Common Stock purchasable under any stock
option, the exercise price of any SAR, and the purchase price of any other stock
based award shall not be less than 100% of the fair market value (the "Market
Value") of the shares on the date of the grant of such option, SAR or other
stock based award, or, if the Committee so determines, in the case of certain
awards retroactively granted in tandem with or in substitution for other awards
under the Plan or for any outstanding awards granted under any other plan of the
Company, on the date of grant of such other awards. Options and other purchase
rights shall be exercised by payment in full of the purchase price, at the
discretion of the Committee, by any one or a combination of the following
methods: (a) in cash or (b) by the tendering of shares with a fair market value
equal to all or a portion of the option price for the total number of options
being exercised. In the discretion of the Committee any option may be
accompanied by a "reload option" representing an additional option to acquire
the same number of shares as are tendered in payment of the purchase price. Fair
market value under the Plan shall be the closing sales price of the shares as
reported on the New York Stock Exchange or otherwise in accordance with methods
and procedures established by the Committee. The term of a stock option, SAR or
other stock-based award shall be established by the Committee and set forth in a
written award agreement at time of the award except that all rights to exercise
an Incentive Stock Option ("ISO") shall expire not more than ten years after the
date of grant.

     Restricted stock may be granted either at no cost to the grantee or for
such cost as specified by the award agreement. Restricted stock may not be sold,
transferred, assigned, pledged or otherwise encumbered or disposed of during the
period of restrictions determined by the Committee. Restrictions, as determined
by the Committee, may be based on a period of continuous employment, on
obtaining specific business objective or on other quantitative or qualitative
criteria. The Committee may also, in its sole discretion, shorten or terminate
the period for the lapsing of restrictions or waive any conditions for the
lapsing or termination of restrictions as regards all or any portion of the
restricted stock. Regardless of the manner in which the restricted stock may be
evidenced, the grantee shall generally have the rights and privileges of a
shareholder as to the restricted shares including the right to vote, the right
to receive cash or stock dividends, unless otherwise specified in the award
agreement.

     The Committee is also authorized to establish the terms and conditions of
other stock-based awards, subject to the terms of the Plan and the requirements
of Rule 16b-3 under the Securities Exchange Act of 1934 ("Rule 16b-3"). The
Committee may grant other stock-based awards that do not require the payment of


                                        7

<PAGE>


consideration (other than services previously rendered, or as may be permitted
by applicable law, services to be rendered). If a purchase is required, the
purchase price must be at least equal to the Market Value on date of grant.

     No employee award granted under the Plan may be assigned or transferred
except by will or the laws of descent and distribution, provided, however, that
transferability of stock option grants is permitted with the approval of the
Committee.

NEW PLAN BENEFITS

     Regulations of the Securities and Exchange Commission call for a table
setting forth the amounts that will be received by (i) the CEO and four other
executive officers named in this proxy statement, (ii) the Company's executive
officers as a group, (iii) directors who are not executive officers as a group,
and (iv) all employees, including officers who are not executive officers, as a
group, under the Plan being submitted to the stockholders for approval, if such
amounts are determinable. If such amounts are not determinable, which is the
case for the Plan, the Company is required to set out the amounts which would
have been received for the last fiscal year if the Plan had been in effect, as
amended.

     The amounts which would have been received for fiscal 1998 in the case of
the Plan are the amounts actually granted in fiscal year 1998 under the same
plan. These amounts are reflected (i) under the tables and footnotes in the
Executive Compensation Section for the CEO and four other executive officers
named in the proxy statement, and those tables and footnotes have been extended
to provide the required information for the Company's executive officers as a
group and for all employees, including officers who are not executive officers,
as a group; and (ii) under the "DIRECTOR COMPENSATION" section. On September 30,
1998, the closing sale price of a share of Common Stock of the Company on the
New York Stock Exchange was $16.00.

NONEMPLOYEE DIRECTOR AWARDS

     Each member of the Board of Directors who is not a full time employee of
the Company shall have, in lieu of cash payment, 30% of the annual retainer
payable for services to be rendered on the Board during the following service
year (for convenience determined as December 1 through November 30) credited to
a deferred stock account. The number of shares to be credited shall be
determined by dividing such installments by the Market Value of Common Stock on
the first business day of December. The participant may also elect to defer up
to 100% of his or her annual retainer and meeting fees into the deferred stock
account.

CHANGE IN CONTROL

     The Plan provides that upon a Change in Control all stock options and SARs
shall immediately become exercisable in full. In addition, all forfeitable
awards and a pro rata portion of all performance-based awards will immediately
become non-forfeitable. Furthermore, on or after a Change in Control, the
Committee may not under any circumstances change any determination of the basis
on which any previously granted award shall be measured or paid or change any
other terms, conditions or provisions affecting any previously granted awards,
if the change would adversely affect any such award or the participant's rights
thereto.

AMENDMENT OR TERMINATION

     The Board may terminate, amend or revise the Plan at any time provided that
the Board may not amend the Plan in any manner or by any procedure that would
result in noncompliance with Rule 16b-3 or any applicable law.

FEDERAL INCOME TAX CONSEQUENCES

     The principal Federal income tax consequences of awards under the Plan,
based on the current provisions of the Internal Revenue Code and the regulations
thereunder, are as follows.

     Generally, the grant of an option or SAR to an employee is not expected to
result in income to the employee or in a deduction for the Company.

     In general, upon the exercise of an ISO, the employee will not recognize
income, and the Company will not be entitled to a tax deduction. (However, the
excess of the acquired shares' fair market value on the exercise date over the
option price is included in the employee's income for purposes of the
alternative minimum tax.) When an employee disposes of ISO shares, the
difference between the option price and the


                                        8

<PAGE>


amount realized by the employee will, in general, constitute a long-term capital
gain or loss, as the case may be. However, if the employee fails to hold the ISO
shares for more than one year after exercising the ISO and for more than two
years after the grant of the ISO, the portion of any gain realized by the
employee upon the disposition of the shares that does not exceed the excess of
the fair market value of the shares on the exercise date over the option price
generally will be treated as ordinary income, the balance of any gain or any
loss will be treated as a capital gain or loss (long-term or short-term,
depending on whether the shares have been held for more than one year), and the
Company will be entitled to a tax deduction equal to the amount of ordinary
income recognized by the employee.

     In general, upon the exercise of an option other than an ISO (a
"nonqualified option"), the employee will recognize ordinary income equal to the
excess of the acquired shares' fair market value on the exercise date over the
option price, and, assuming that the grants qualify under Section 162(m) of the
Code, the Company will be entitled to a tax deduction in the same amount. Upon
the exercise of a SAR, the employee will recognize as ordinary income any cash
received and the fair market value on the exercise date of any shares received,
and the Company will be entitled to a tax deduction in the same amount.

     With respect to other awards granted under the Plan (including Nonemployee
Director Awards) that are settled either in cash or in shares that are
transferable or are not subject to a substantial risk of forfeiture, the grantee
will recognize ordinary income equal to the excess of (a) the cash or the fair
market value of any shares received (determined as of the date of settlement)
over (b) the amount, if any, paid for the shares by the grantee, and the Company
will be entitled to a tax deduction in the same amount. In the case of an award
that is settled in shares that are nontransferable and subject to a substantial
risk of forfeiture, the grantee will generally recognize ordinary income equal
to the excess of (a) the fair market value of the shares received (determined as
of the date on which the shares become transferable or not subject to a
substantial risk of forfeiture, whichever occurs first) over (b) the amount, if
any, paid for the shares, and the Company will be entitled to a tax deduction in
the same amount. A grantee may elect to recognize income when the shares are
received, rather than upon the expiration of the transfer restriction or risk of
forfeiture and the amount of ordinary income will be determined as of the date
of receipt rather than upon expiration of the applicable restriction and the
Company's tax deduction will be determined at the same time.

     The affirmative vote of a majority of the shares represented at the meeting
will be required to approve the amendment to the Plan. In the event this
Proposal 3 does not receive the required affirmative vote, the amendment will
not be put into effect.

     THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" THE FOREGOING PROPOSAL.


                                        9

<PAGE>


                             EXECUTIVE COMPENSATION

     The following table sets forth as to each person who was at the end of
fiscal 1998, the Chief Executive Officer and the other four most-highly
compensated executive officers of the Company information concerning the cash
and noncash compensation for services rendered to the Company for each of the
last three fiscal years (the "Named Officers").

                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                                                                          LONG TERM COMPENSATION
                                                                 --------------------------------------
                                        ANNUAL COMPENSATION(1)            AWARDS             PAYOUTS
                                        ----------------------   ------------------------  ------------
                                                                              SECURITIES
                                                                              UNDERLYING
                                                                 RESTRICTED     STOCK
                                                                   STOCK     OPTIONS/SARs                 ALL OTHER
                               FISCAL                             AWARD(S)     (SHARES)    LTIP PAYOUTS  COMPENSATION
NAME AND PRINCIPAL POSITION     YEAR    SALARY($)     BONUS($)     ($)(5)        (2)          ($)(3)        ($)(4)
- ---------------------------    ------   ---------     --------   ----------  ------------  ------------  ------------
<S>                             <C>      <C>          <C>         <C>          <C>            <C>        <C>   
WILLIAM G. VAN DYKE .........   1998     483,846      606,000           0       78,000        322,734        27,373
 Chairman, Chief                1997     450,000      540,000           0      131,704        525,586       173,520
 Executive Officer and          1996     385,000      462,000           0      108,724        190,125       121,960
 President

JAMES R. GIERTZ .............   1998     219,769      133,896           0       57,964        147,133         6,672
 Senior Vice President and      1997     199,808      151,639           0       61,360        766,480        61,582
 Chief Financial Officer        1996     220,000      181,229     315,625       30,600              0        50,434

NICKOLAS PRIADKA ............   1998     207,154      140,713           0       42,631        117,990         5,803
 Senior Vice President,         1997     187,808      133,739           0       61,400        186,462        56,340
 OE Engine                      1996     169,117      108,165           0       20,600        129,050        37,174

LOWELL F. SCHWAB ............   1998     183,462      151,069           0       24,000         99,664         5,477
 Senior Vice President,         1997     168,450      152,491           0       26,474        481,787        56,243
 Operations                     1996     148,808       88,911           0       16,296              0        32,546

WILLIAM M. COOK .............   1998     196,539      164,441           0       26,000         59,333         3,796
 Senior Vice President,         1997     178,154       85,260           0       43,484         91,248        46,214
 Commercial and Industrial      1996     160,425       72,883           0       25,666         39,715        29,190
</TABLE>

- ------------------
(1)  Includes any portion deferred under the Management Compensation Plan.

(2)  Shares adjusted for stock splits.

(3)  Earned under the Company's 1991 Master Stock Compensation Plan during the
     three-year period ending in the fiscal year in which the payout is listed.
     Payout is made in the form of the Company's common stock and delivered
     during the following fiscal year.

(4)  Amounts in this column for 1998 represent the dollar value of share
     allocations (i) under the Company's match for bonus and salary under the
     Company's ESOP and 401k benefit plans; and (ii) under the Company's match
     for deferred bonus and salary and salary in excess of the limits
     established by Section 415 of the Internal Revenue Code contributed by the
     Company to an unqualified supplemental plan. The amounts for fiscal 1998
     are:

<TABLE>
<CAPTION>
                                           SALARY        DEFERRED SALARY
         NAME                          AND BONUS MATCH   AND BONUS MATCH   EXCESS MATCH
         ----                          ---------------   ---------------   ------------
<S>                                        <C>              <C>             <C>    
         William G. Van Dyke ........      $5,383           $15,994         $11,379
         James R. Giertz ............       5,541                 0           6,672
         Nickolas Priadka ...........       5,039               408           5,395
         Lowell F. Schwab ...........       5,019                 0           5,477
         William M. Cook ............       5,301             1,559           2,237
</TABLE>

     1997 and 1996 amounts represent the dollar value of share allocations under
     the Company's ESOP and benefits in excess of the limits established by
     Section 415 of the Internal Revenue Code contributed by the Company to an
     unqualified supplemental plan.


                                       10

<PAGE>


(5)  Amounts in the Restricted Stock Award column represent the dollar value of
     grants of restricted stock under the Company's 1991 Master Stock
     Compensation Plan. Regular dividends are paid on the restricted shares. At
     the end of fiscal 1998, the number and value of the aggregate restricted
     stockholdings for the Named Officers were: William G. Van Dyke, 0, $0;
     James R. Giertz, 25,000, $464,063; Nickolas Priadka, 8,400, $155,925;
     Lowell F. Schwab, 8,400, $155,925; and William M. Cook, 0, $0. No
     restricted stock awards were made to Executive Officers as a group and
     grants of 1,000 shares ($17,000) of restricted stock were made to all
     Non-Executive Officer Employees as a Group.

                    OPTION/SARs GRANTED IN LAST FISCAL YEAR

<TABLE>
<CAPTION>
                                        INDIVIDUAL GRANTS(1)
                            -----------------------------------------
                              NUMBER OF      % OF TOTAL                                 POTENTIAL REALIZABLE VALUE AT
                             SECURITIES     OPTIONS/SARs                                ASSUMED ANNUAL RATES OF STOCK
                             UNDERLYING      GRANTED TO    EXERCISE                 PRICE APPRECIATION FOR OPTION TERM(3)
                            OPTIONS/SARs     EMPLOYEES      OR BASE     EXPIRATION  -------------------------------------
NAME                         GRANTED(2)   IN FISCAL YEAR  PRICE/sh($)      DATE       0% ($)       5% ($)        10% ($)
- ----                        ------------  --------------  -----------   ----------  ---------   -----------    ----------
<S>                            <C>             <C>          <C>          <C>         <C>         <C>            <C>      
WILLIAM G. VAN DYKE            78,000          17.7         22.688       12/19/07        0       1,114,314      2,824,703

JAMES R. GIERTZ                29,000           6.6         22.688       12/19/07        0         414,296      1,050,210
                               14,749(4)        3.3         23.250       09/08/04        0         132,126        305,255
                                5,845(4)        1.3         23.250       12/21/05        0          64,493        154,301
                                4,176(4)         .9         23.250       12/05/06        0          52,943        130,107
                                4,194(4)        1.0         21.063       12/05/06        0          44,879        108,754

NICKOLAS PRIADKA               27,000           6.1         22.688       12/19/07        0         385,724        977,782
                                7,931(4)        1.8         22.688       12/21/05        0          85,134        203,572
                                7,700(4)        1.7         22.688       12/05/06        0          94,863        232,929

LOWELL F. SCHWAB               24,000           5.4         22.688       12/19/07        0         342,866        869,139

WILLIAM M. COOK                26,000           5.9         22.688       12/19/07        0         371,438        941,568

ALL EXECUTIVE OFFICERS
 AS A GROUP                   250,595          56.9

ALL NON-EXECUTIVE OFFICER
 EMPLOYEES AS A GROUP         190,000          43.1
</TABLE>

- ------------------
(1)  No stock appreciation rights ("SARs") have been granted.

(2)  All grants (other than as noted in footnote(4)) during the period were
     non-qualified stock options granted at the market value on date of grant
     for a term of ten years, vesting in three equal annual installments
     beginning 12/19/98, and were granted with the right to use shares in lieu
     of the exercise price and to satisfy any tax withholding obligations.

(3)  These amounts represent certain assumed rates of appreciation over the full
     term of the option. The value ultimately realized, if any, will depend on
     the amount by which the market price of the Company's stock exceeds the
     exercise price on date of sale.

(4)  These grants were made to individuals who exercised an option during fiscal
     1998 and made payment of the purchase price using shares of previously
     owned Company stock. This restoration or "reload" grant is for the number
     of shares equal to the shares used in payment of the purchase price or
     withheld for tax withholding. The option price is equal to the market value
     of the Company's stock on the date of exercise and will expire on the same
     date as the original option which was exercised. These options, which are
     the result of such a restoration, do not contain the reload feature.


                                       11

<PAGE>


               AGGREGATED OPTION/SAR EXERCISES IN LAST FISCAL YEAR
                      AND FISCAL YEAR END OPTION/SAR VALUES

<TABLE>
<CAPTION>
                                                        NUMBER OF SECURITIES                VALUE OF UNEXERCISED
                                                       UNDERLYING UNEXERCISED            IN-THE-MONEY OPTIONS/SARs
                                                   OPTIONS/SARs AT FISCAL YEAR-END(2)     AT FISCAL YEAR-END(2)(3)
                                                   ----------------------------------  -----------------------------
                           SHARES        VALUE
                         ACQUIRED ON    REALIZED     EXERCISABLE       UNEXERCISABLE    EXERCISABLE    UNEXERCISABLE
NAME                     EXERCISE(1)      ($)         (SHARES)           (SHARES)           ($)             ($)
- ----                     -----------    ---------  --------------     ---------------  -------------   -------------
<S>                        <C>          <C>            <C>                <C>            <C>              <C>    
WILLIAM G. VAN DYKE        60,000       1,020,000      454,736            161,500        3,439,033        315,156

JAMES R. GIERTZ            36,287         334,935       61,324             63,633           36,680        139,376

NICKOLAS PRIADKA           19,300         164,166      119,011             55,300          726,806        105,356

LOWELL F. SCHWAB                0               0       36,808             47,300          210,273         82,169

WILLIAM M. COOK             1,156          10,838       50,017             53,333          202,690        101,958
</TABLE>

- ------------------
(1)  The number of shares shown in this column is larger than the number of
     shares actually acquired on exercise. The actual number of shares received
     is reduced by the number of shares delivered in payment of the exercise
     price and shares withheld to cover withholding taxes.

(2)  No SARs were exercised in fiscal 1998.

(3)  This value is based on the difference between the exercise price of such
     options and the closing price of Company Common Stock as of fiscal year-end
     1998.


             LONG-TERM INCENTIVE PLANS -- AWARDS IN LAST FISCAL YEAR


<TABLE>
<CAPTION>
                                                                   ESTIMATED FUTURE PAYOUTS
                         NUMBER OF           PERFORMANCE                UNDER NON-STOCK
                       SHARES, UNITS       OR OTHER PERIOD             PRICE-BASED PLAN
                          OR OTHER        UNTIL MATURATION      ------------------------------
NAME                     RIGHTS(1)           OR PAYOUT          THRESHOLD    TARGET    MAXIMUM
- ----                   -------------      ----------------      ---------    ------    -------
<S>                       <C>             <C>                     <C>        <C>       <C>   
WILLIAM G. VAN DYKE       14,200          8/1/97 - 7/31/00        7,100      14,200    39,050

JAMES R. GIERTZ            5,400          8/1/97 - 7/31/00        2,700       5,400    14,850

NICKOLAS PRIADKA           5,100          8/1/97 - 7/31/00        2,550       5,100    14,025

LOWELL F. SCHWAB           4,600          8/1/97 - 7/31/00        2,300       4,600    12,650

WILLIAM M. COOK            4,800          8/1/97 - 7/31/00        2,400       4,800    13,200
</TABLE>

- ------------------
(1)  Awards are of Performance Units, each of which represents the right to
     receive one share of the Company's common stock. Awards are earned only if
     the Company achieves the minimum Performance Objectives and the Award Value
     will be based on a weighting of compound corporate net sales growth and
     after-tax return on investment over the three year period. The amounts
     shown in the table under the headings "Threshold", "Target" and "Maximum"
     are amounts awarded at 50%, 100% and 275% of the targeted award. The award
     may also be adjusted upward by 25% for consistency if earnings per share
     increase in each of the three years in the period by at least 5%.


                                       12

<PAGE>


           HUMAN RESOURCES COMMITTEE REPORT ON EXECUTIVE COMPENSATION

     The Human Resources Committee of the Board of Directors, consisting of five
independent, non-employee directors ("the Committee"), is responsible for
establishing the compensation programs for the Company's executive officers. The
objectives of the Company's executive compensation program are to:

     *    emphasize a pay-for-performance philosophy by placing significant
          portions of pay at risk and requiring outstanding results for payment
          at the threshold level;

     *    attract and retain the best executives available in our industry and
          have their compensation levels keyed to a peer group of companies;

     *    motivate and reward executives responsible for attaining the financial
          and strategic objectives essential to the Company's long-term success
          focusing on earnings per share growth and continued growth in
          stockholder value; and

     *    align the interests of executives with those of the Company's
          stockholders by providing a significant portion of compensation in the
          form of Company common stock. Common stock ownership objectives have
          been established for all executive officers ranging from five to ten
          times base salary.

     BASE SALARIES. Base salaries for all executives are reviewed annually based
on performance and market conditions. A performance appraisal is required for
all executives of the Company. The Committee approves and/or determines the
annual base salary increases for all senior executives based on performance of
the executive and external market data. Our objective is that base salaries
should approximate the mid-point (average) of senior executives of manufacturing
companies of similar size in the United States. The Company uses nationally
known consultant surveys for external market data.

     ANNUAL CASH INCENTIVE. Executive officers are eligible for target awards
under the annual incentive program that range up to 60% of base salary. The size
of the target award is determined by the executive officer's position and
competitive data for similar positions at the peer and cross-industry companies
as presented in the same nationally recognized surveys as are used for the base
salary. The Company sets aggressive performance goals and, in keeping with the
strong performance-based philosophy, the resulting awards decrease or increase
substantially if actual Company performance fails to meet or exceeds targeted
levels. Payments can range from 0% to 200% of the target awards. Executive
officers have up to 100% of their annual cash incentive opportunity linked to
achieving record Earnings Per Share (EPS).

     Consequently, executive officers must obtain record EPS, thereby increasing
stockholder value, to receive a competitive annual cash incentive.

     LONG-TERM INCENTIVE COMPENSATION. The Long-Term Performance Award program
is based on three-year compounded growth in net sales and an after-tax Return on
Investment that exceeds the Company's weighted average cost of capital. Under
this program, the Committee selected eligible executives and established an
incentive opportunity as a percentage of base salary. In order for a participant
to receive a payout, minimum performance must be attained. Payout for the
1996-1998 cycle is listed in the Compensation Table. The Committee occasionally
grants restricted stock with a fixed restriction period, usually five years, to
insure retention of key executives. The Committee also believes that significant
stock option grants encourage the executive officers to own and hold Donaldson
stock and tie their long-term economic interests directly to those of the
stockholders. Stock options are typically granted annually. In determining the
number of shares covered by such options, the Committee takes into account
position levels, base salary, and other factors relevant to individual
performance but does not consider the amount and terms of options and restricted
stock already held by the executive.

     Targets for the incentive portion of compensation are tied to financial
performance in the sixty-fifth percentile of the peer group.

     STOCK OWNERSHIP. Ownership of Donaldson stock is expected of Donaldson
executives. The Committee believes that linking a significant portion of the
executive's current and potential net worth to the Company's success, as
reflected in the stock price, gives the executive a stake similar to the
stockholders. The Committee has established stock ownership guidelines for the
Named Officers and certain other executive officers, which encourage retention
of shares obtained through the exercise of options. The guidelines range from
five to ten


                                       13

<PAGE>


times base salary. The goal of the Chief Executive Officer is ten times annual
base salary. Mr. Van Dyke currently exceeds this ownership goal.

     COMPENSATION OF THE CHIEF EXECUTIVE OFFICER.  Mr. Van Dyke's fiscal 1998
base salary and incentive award were determined by the Committee in accordance
with the methodology described above.

          BASE SALARY. Mr. Van Dyke's base salary for calendar 1998 was
     $505,000, which is below the market mid-point for manufacturing companies
     of similar size.

          ANNUAL BONUS. Mr. Van Dyke's bonus award for fiscal 1998 was $606,000.
     This annual bonus was earned under the annual incentive program based on
     EPS growth of $1.14; up 15% over the previous record earned in fiscal 1997.

          STOCK OPTIONS. Mr. Van Dyke received an annual grant in December 1997
     of options to purchase 39,000 shares of stock.

     POLICY ON QUALIFYING COMPENSATION. The Company's policy is to preserve the
tax deduction for compensation paid to its Chief Executive Officer and other
senior executive officers. In accordance with this policy, in November 1994 the
stockholders approved the material terms of the performance goals for payment of
the cash bonus under the Company's Annual Cash Bonus Plan for Designated
Executives. The 1991 Master Stock Compensation Plan has been amended, subject to
stockholder approval, to limit the number of shares that can be granted in any
one year to any one individual to further the policy of preserving the tax
deduction for compensation paid to executives.

     CONCLUSION. The executive officer compensation program administered by the
Committee provides incentive to attain strong financial performance and an
alignment with stockholder interests. The Committee believes that the Company's
compensation program focuses the efforts of Company executive officers on the
continued achievement of growth and profitability for the benefit of the
Company's stockholders.

      SUBMITTED BY THE HUMAN RESOURCES COMMITTEE OF THE BOARD OF DIRECTORS

                               Stephen W. Sanger, Chairperson
                               Paul B. Burke
                               Jack W. Eugster
                               John F. Grundhofer
                               Kendrick B. Melrose



                               PERFORMANCE GRAPHS

     The following graphs compare the cumulative total stockholder return on the
Company's Common Stock for the last five fiscal years and nine fiscal years with
the cumulative total return of the Standard & Poor's 500 Stock Index and the
Standard & Poor's Index of Manufacturing Companies. The first graph assumes the
investment of $100 in the Company's Common Stock and each of the indexes at the
market close on fiscal year-end 1992 and the reinvestment of all dividends. The
second graph assumes the investment of $100 in the Company's Common Stock and
each of the indexes at the market close on fiscal year-end 1989 and the
reinvestment of all dividends. The Company believes the second graph is useful
in showing the cumulative total stockholder return over the nine-year period of
consecutive double-digit increases in earnings per share.


                                       14

<PAGE>


                 COMPARISON OF FIVE YEAR CUMULATIVE TOTAL RETURN


                               [PLOT POINTS GRAPH]

                           FISCAL YEARS ENDED JULY 31

<TABLE>
<CAPTION>
                           1993       1994       1995       1996       1997       1998
                         --------   --------   --------   --------   --------   --------
<S>                      <C>        <C>        <C>        <C>        <C>        <C>
Donaldson .............  $ 100.00   $ 133.54   $ 147.49   $ 137.36   $ 229.78   $ 211.12
S&P 500 ...............    100.00     105.16     132.62     154.59     235.19     280.54
S&P Manufacturing .....    100.00     116.33     159.39     188.60     294.92     290.24
</TABLE>


                 COMPARISON OF NINE YEAR CUMULATIVE TOTAL RETURN


                               [PLOT POINTS GRAPH]

                           FISCAL YEARS ENDED JULY 31

<TABLE>
<CAPTION>
                           1989       1990       1991       1992       1993       1994       1995       1996       1997       1998  
                         --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
<S>                      <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C> 
Donaldson .............  $ 100.00   $ 181.27   $ 209.85   $ 274.83   $ 341.32   $ 455.80   $ 503.43   $ 468.85   $ 784.29   $ 720.60
S&P 500 ...............    100.00     106.50     158.44     178.70     194.30     204.33     257.68     300.37     456.99     545.09
S&P Manufacturing .....    100.00     109.34     115.50     120.57     139.40     162.16     222.19     262.92     411.13     404.60
</TABLE>


                                       15

<PAGE>


                                PENSION BENEFITS

     The Company maintains the Donaldson Company, Inc. Salaried Employees'
Pension Plan (the "Retirement Plan"), which provides benefits for eligible
employees. Through July 31, 1997 the Retirement Plan was structured as a
traditional, defined benefit plan. Effective August 1, 1997, the Retirement Plan
was amended to provide defined benefits pursuant to a cash balance feature
whereby a participant accumulates a benefit based upon a percentage of current
salary which varies with age, service and interest credits, and the present
value of accrued benefits under the Retirement Plan was converted to an initial
cash balance.

     Under the cash balance formula, each participant has an account, for record
keeping purposes only, to which credits are allocated each payroll period based
upon the following two percentages: The "Applicable Base Percentage" of the
participant's total compensation in the current pay period ("Pensionable
Earnings") and the "Applicable Excess Percentage" of Pensionable Earnings in
excess of the Social Security taxable wage base. The applicable percentages are
determined by the age and years of service of the participant with the Company
and its affiliates as of the end of each plan year. The following table shows
the Applicable Base and Excess Percentages used to determined credits at the age
and years of service indicated.

                                                 APPLICABLE PERCENTAGE
                                                 ---------------------
              SUM OF AGE PLUS YEARS OF SERVICE     BASE        EXCESS
              --------------------------------   --------     --------

                        Less than 40                3.0%        3.0%
                          40 -- 49                  4.0         4.0
                          50 -- 59                  5.0         5.0
                          60 -- 69                  6.5         5.0
                         70 or more                 8.5         5.0

     As of August 1, 1998 the sum of age plus years of service for Messrs. Van
Dyke, Giertz, Priadka, Schwab and Cook were 78, 45, 80, 67 and 62, respectively.

     In addition, all balances in the accounts of participants earn a fixed rate
of interest which is credited annually. The interest rate for a particular plan
year is based on the average of the daily one-year U.S. Treasury Note yields for
the previous June plus one percent. For the 1998 fiscal/plan year, the interest
rate is 6.13%.

     At retirement or other termination of employment, an amount equal to the
vested balance then credited to the account is payable to the participant in the
form of an immediate or deferred, lump sum or annuity for the entire benefit
under the Plan.

     The individuals named in the Summary Compensation Table also are eligible
for benefits under the Donaldson Company Excess Retirement Plan (the "Excess
Retirement Plan"). The Excess Retirement Plan is an unfunded, non-qualified
deferred compensation arrangement that primarily provides benefits that cannot
be payable under a qualified plan like the Retirement Plan because of the
maximum limitations imposed on such plans by the Code. The projections below set
forth the estimated annual benefit payable to each of the individuals named in
the Summary Compensation Table as a single life annuity at age 65 under the
Retirement Plan and the Excess Retirement Plan. The projections are based on the
following assumptions: (1) employment until age 65 assuming no increase in
pensionable earnings after July 31, 1997; (2) interest credits at the actual
rate of 6.35% for 1998, and an assumed rate of 7% for years thereafter; and (3)
the conversion to a straight life annuity at normal retirement age is based on
an interest rate of 7% and the Unisex 1983 Group Annuity Mortality table: Mr.
Van Dyke, $621,918; Mr. Giertz, $267,815; Mr. Priadka, $229,276; Mr. Schwab,
$181,919; and Mr. Cook, $228,193.

     The Company has a supplementary retirement benefit plan which is intended
to assure that Messrs. Van Dyke, Giertz, Priadka, Schwab and Cook will receive
at least 60% of their average (five highest years) compensation upon retirement
at age 65 with 2% reduction for each year in the event of early retirement after
age 55. In determining whether the plan must supplement other retirement
benefits to reach such level, the Company will consider the benefits described
in the previous paragraph, the Pension Plan Table and footnote(5) to the Summary
Compensation Table as well as 50% of primary Social Security and vested pension
benefits from prior employers, if any. Assuming the plan is unchanged and
employment until age 65, based on current compensation and payment levels from
other plans, no payments would be made under the plan to any of the five
participants.


                                       16

<PAGE>


COMPLIANCE WITH SECTION 16(a) OF THE SECURITIES EXCHANGE ACT OF 1934 

     Section 16(a) of the Securities Exchange Act of 1934 requires the Company's
directors and executive officers to file initial reports of ownership and
reports of changes in ownership with the SEC and the New York Stock Exchange. To
the Company's knowledge, based on a review of copies of such forms and written
representations furnished to the Company during fiscal 1998, all Section 16(a)
filing requirements applicable to the Company's directors and executive officers
were satisfied except as follows: a late filing made on behalf of William Cook
of an exempt transaction reporting the vesting of restricted shares in May 1998;
and a late filing made on behalf of Kendrick Melrose reporting an exempt gift of
600 shares in April 1998.

                         CHANGE-IN-CONTROL ARRANGEMENTS

     Each of the Named Officers has a severance agreement with the Company
designed to retain the executive and provide for continuity of management in the
event of an actual or threatened change of control in the Company (as defined in
the agreements). The agreements provide that in the event of a change of
control, each key employee would have specific rights and receive certain
benefits if, within three years after a change in control, the employee is
terminated without cause or the employee terminates voluntarily under
"constructive involuntary" circumstances as defined in the agreement. In such
circumstance the employee will receive a severance payment equal to three times
the employee's annual average compensation calculated over the five years
preceding such termination as well as continued health, disability and life
insurance for three years after termination. The 1980 and 1991 Master Stock
Compensation Plans, the supplementary retirement agreements and deferred income
arrangements also provide for immediate vesting or payment in the event of
termination under circumstances of a change in control.

                           1999 STOCKHOLDER PROPOSALS

     Any stockholder wishing to include a proposal in the Company's Proxy
Statement for its 1999 annual meeting of stockholders must submit such proposal
for consideration in writing to the Secretary of the Company at the address
indicated on the first page of this Proxy Statement no later than June 16, 1999.
Under the Company's Bylaws, a shareholder proposal not included in the Company's
Proxy Statement for its 1999 annual meeting of stockholders is untimely and may
not be presented in any manner at the 1999 annual meeting of stockholders unless
the stockholder wishing to make such proposal follows certain specified notice
procedures set forth in the Company's Bylaws, including delivering notice of
such proposal in writing to the Secretary of the Company at the address
indicated on the first page of this Proxy Statement no earlier than August 21,
1999 and no later than September 20, 1999.

                                  OTHER MATTERS

     The Company is not aware of any matter, other than as stated above, which
will or may properly be presented for action at the meeting. If any other
matters properly come before the meeting, it is the intention of the persons
named in the enclosed form of proxy to vote the shares represented by such
proxies in accordance with their best judgment.

                                      By Order of the Board of Directors

                                      /s/ Norman C. Linnell

                                      Norman C. Linnell
                                      SECRETARY

October 14, 1998


                                       17

<PAGE>


                                                                       EXHIBIT A


                             DONALDSON COMPANY, INC.
                       1991 MASTER STOCK COMPENSATION PLAN


                                   I. GENERAL


SECTION 1.01 PURPOSE OF THE PLAN.

     The purpose of the 1991 Master Stock Compensation Plan is to enhance the
long-term profitability of Donaldson and shareholder value by offering stock
based incentives in addition to current compensation to those individuals who
are key to the growth and success of Donaldson.

SECTION 1.02 DEFINITIONS.

     For all purposes of the Plan, the following terms shall have the meanings
assigned to them, unless the context otherwise requires:

     (a) "Award" means any award described in Parts II and III.

     (b) "Award Agreement" means an agreement entered into between Donaldson and
a Participant setting forth the terms and conditions applicable to the Award
granted to the Participant.

     (c) "Change in Control". A "Change in Control" of Donaldson shall have
occurred if (i) any "person", as such term is used in Sections 13(d) and 14(d)
of the Securities Exchange Act of 1934, as amended (the "Exchange Act") (other
than Donaldson, any trustee or other fiduciary holding securities under an
employee benefit plan of Donaldson or any corporation owned, directly or
indirectly, by the shareholders of Donaldson in substantially the same
proportions as their ownership of stock of Donaldson), either is or becomes the
"beneficial owner" (as defined in Rule 13d-3 under the Exchange Act), directly
or indirectly, of securities of Donaldson representing 30% or more of the
combined voting power of Donaldson's then outstanding securities, (ii) during
any period of two consecutive years (not including any period prior to the
effective date of this Plan), individuals who at the beginning of such period
constitute the Board of Directors of Donaldson (the "Board" ), and any new
director (other than a director designated by a person who has entered into an
agreement with Donaldson to effect a transaction described in clause (i), (iii)
or (iv) of this subparagraph) whose election by the Board or nomination for
election by Donaldson's shareholders was approved by a vote of at least
two-thirds (2/3) of the directors then still in office who either were directors
at the beginning of the period or whose election or nomination for election was
previously so approved, cease for any reason to constitute at least a majority
thereof, unless the approval of the election or nomination for election of such
new directors was in connection with an actual or threatened election or proxy
contest, (iii) the shareholders of Donaldson approve a merger or consolidation
of Donaldson with any other corporation, other than (A) a merger or
consolidation which would result in the voting securities of Donaldson
outstanding immediately prior thereto continuing to represent (either by
remaining outstanding or by being converted into voting securities of the
surviving entity) more than 80% of the combined voting power of the voting
securities of Donaldson or such surviving entity outstanding immediately after
such merger or consolidation or (B) a merger or consolidation effected to
implement a recapitalization of Donaldson (or similar transaction) in which no
"person" (as hereinabove defined) acquires more than 30% of the combined voting
power of Donaldson's then outstanding securities or (iv) the shareholders of
Donaldson approve a plan of complete liquidation of Donaldson or an agreement
for the sale or disposition by Donaldson of all or substantially all of
Donaldson's assets or any transaction having a similar effect (the date upon
which an event described in clause (i), (ii), (iii) or (iv) of this paragraph
(c) occurs shall be referred to herein as an "Acceleration Date").

     (d) "Committee" means the subcommittee (or subcommittees as may be
necessary) of the Human Resources Committee of the Board of Directors (the
"Board") appointed to administer the Plan and constituted so as to satisfy the
legal requirements, including any such requirements for disinterested
administration, imposed by Rule 16b-3 of the Exchange Act ("Rule 16b-3").

     (e) "Common Stock" means the Common Stock of Donaldson, par value $5.00 per
share, including treasury Shares and authorized but unissued Shares or any
security of Donaldson issued in substitution, exchange or in lieu thereof.


                                       A-1

<PAGE>


     (f) "Donaldson" means Donaldson Company, Inc. and its Subsidiaries.

     (g) "Limitation Amount" means with respect to any Plan Year, one and one
half (11/2) percent of the Outstanding Shares.

     (h) "Market Value" of Common Stock as of any date means the closing sales
price on such date on the New York Stock Exchange, or if there was no sale on
that date, then, unless otherwise specifically set forth hereinafter, on the
preceding date on which a sale occurred.

     (i) "Outstanding Shares" means, with respect to any Plan Year, the
outstanding Shares of Common Stock, outstanding Common Stock equivalents (as
determined by Donaldson in the calculation of earnings per share on a fully
diluted basis) and Treasury Shares as reported in the Annual Report on Form 10-K
of Donaldson for the most recent fiscal year that ends during the Plan Year.

     (j) "Participant" means an individual who has been granted an Award
pursuant to the Plan.

     (k) "Plan" means this 1991 Master Stock Compensation Plan.

     (l) "Plan Year" means the calendar year.

     (m) "Shares" means shares of Common Stock.

     (n) "Subsidiary" means any corporation or other entity of which a majority
of the voting power is owned, directly or indirectly, by Donaldson, or which is
otherwise controlled by Donaldson.

SECTION 1.03 SHARES SUBJECT TO THE PLAN.

     (a) Subject to adjustments authorized by Section 1.05 and the provisions of
the remaining subsections of this Section 1.03, the number of Shares with
respect to which Awards may be issued under the Plan in any Plan Year shall not
exceed the Limitation Amount; provided that any Shares with respect to which
Awards may be issued, but are not issued, under the Plan in any Plan Year shall
be carried forward and shall be available to be covered by Awards issued in any
subsequent Plan Year in which Awards may be issued under the Plan.

     (b) In the event any options granted under the Plan shall terminate or
expire for any reason without having been exercised in full, the Shares not
purchased under such options shall again be available under the Plan.

     (c) In the event Shares that are the subject of Awards under the Plan are
subsequently forfeited to Donaldson pursuant to the applicable restrictions or
Award Agreement, such Shares shall again be available under the Plan.

     (d) If a Participant exercises a stock appreciation right, any Shares
covered by the stock appreciation right in excess of the number of Shares issued
(or, in the case of a settlement in cash or any other form of property, in
excess of the number of Shares equal in value to the amount of such settlement,
based on the Market Value of such Shares on the date of such exercise) shall
again be available under the Plan.

     (e) If pursuant to the terms of the Plan a Participant uses Shares to (i)
pay a purchase or exercise price, including an option exercise price, or (ii)
satisfy tax withholding or payment requirements, such Shares shall become
available for grant under the Plan; provided, however, that such Shares shall
not become available for grant under the Plan unless the Committee determines
that this provision would be in compliance with the applicable requirements of
Rule 16b-3 and other applicable law.

     (f) The Shares that again become available under the Plan pursuant to
Subsections (b), (c), and (d) above, and the Shares that become available under
the Plan pursuant to Subsection (e) above, shall be in addition to the number of
Shares authorized by Subsection (a) above.

     (g) Subject to the foregoing provisions of this Section 1.03, the grant of
an Award, the payment or settlement of which may be made in Shares, shall be
deemed to be a grant of Shares equal to the greater of the number of Shares that
may be issued under the Award or the number of Shares on the basis of which the
Award is calculated. The grant of an Award that is convertible into, or
exercisable for, Shares shall be deemed to be a grant of Shares equal to the
number of Shares into which the Award is convertible or exercisable on the date
of grant. Where the value of an Award is variable on the date it is granted, the
value of the Award


                                       A-2

<PAGE>


shall be deemed to be equal to the maximum limitation on the number of Shares
that may be granted or purchased under the Award. Where two or more Awards are
granted with respect to the same Shares, such Shares shall be taken into account
only once for purposes of this Section 1.03.

     (h) Shares authorized or issued under any other plan or which are not
specifically issued pursuant to this Plan, shall not reduce the number of Shares
with respect to which Awards may be issued under this Plan.

SECTION 1.04 ADMINISTRATION OF THE PLAN.

     The Plan shall be administered by the Committee which shall in its sole
discretion determine:

     (a) the individuals to participate in the Plan;

     (b) the number of Shares to be covered by Awards granted under the Plan and
the price to be paid, if any, for such Shares;

     (c) the size and terms of the Awards, any performance periods and
objectives, and range of achievement percentages;

     (d) the provisions governing the disposition of an Award in the event of
retirement, disability, death or other termination of a Participant's employment
or relationship to Donaldson; and

     (e) the interpretation, construction and implementation of the Plan.

     All determinations of the Committee shall be by a majority of its members.
Decisions and determinations by the Committee shall be final.

SECTION 1.05 ADJUSTMENTS UPON CHANGES IN CAPITALIZATION.

     (a) In the event that the Committee shall determine that any dividend or
other distribution (whether in the form of cash, Shares, other securities, or
other property), extraordinary cash dividend, recapitalization, stock split,
reverse stock split, reorganization, merger, consolidation, split-up,
combination, repurchase, or exchange of Shares or other securities,
exercisability of stock purchase rights received under the rights plan, issuance
of warrants or other rights to purchase Shares or other securities, or other
similar corporate transaction or event affects the Shares with respect to which
Awards have been or may be issued under the Plan, such that an adjustment is
determined by the Committee to be appropriate in order to prevent dilution or
enlargement of the benefits or potential benefits intended to be made available
under the Plan, then the Committee, in such manner as the Committee may deem
equitable, may adjust any or all of (i) the number and type of Shares that
thereafter may be made the subject of Awards, (ii) the number and type of Shares
(or other securities or property) subject to outstanding Awards, and (iii) the
grant, purchase, or exercise price with respect to any Award, or, if deemed
appropriate, make provision for a cash payment to the holder of an outstanding
Award; provided, in each case, that with respect to incentive stock options, no
such adjustment shall be authorized to the extent that such adjustment would
cause such options to violate Section 422 of the Internal Revenue Code of 1988
as amended (the "Code") or any successor provision; and provided further, that
the number of Shares subject to any Award denominated in Shares shall always be
a whole number.

     (b) In the event of a corporate merger, consolidation, acquisition of
property or stock, reorganization or liquidation, the Committee shall be
authorized to cause the Corporation to issue or to assume stock options or stock
appreciation rights, whether or not in a transaction to which Section 424(a) of
the Code applies, by means of substitution of new options or rights for
previously issued options or rights or an assumption or previously issued
options or rights, but only if and to the extent that such substitution or
assumption is consistent with the other provisions of the Plan, with the
applicable requirements of Rule 16b-3, and with any other applicable law.

SECTION 1.06 EFFECTIVE DATE.

     The effective date of the Plan shall be the date upon which the Plan shall
be approved by the shareholders of Donaldson. Unless the Plan is terminated
earlier in accordance with Section 1.07 hereof, the Plan shall remain in full
force and effect until the close of business on December 31, 2001, at which time
the right to grant Awards under the Plan shall terminate automatically unless
the Shareholders of Donaldson approve an extension or renewal. Any Awards
granted under the Plan before such termination date shall continue to be
governed, thereafter, by the terms of the Plan and of the Awards.


                                       A-3

<PAGE>


SECTION 1.07 AMENDMENT OR TERMINATION OF PLAN.

     The Board may at any time terminate the Plan or from time to time amend or
revise the terms of the Plan or any part thereof without further action of the
shareholders; provided, however, that the Board may not amend the Plan in any
manner or by any procedure that would result in noncompliance with Rule 16b-3 or
any applicable law.

     Notwithstanding any of the above, on or after the occurrence of a Change in
Control, no direct or indirect alteration, amendment, suspension, termination or
discontinuance of the Plan, no establishment or modification of rules,
regulations or procedures under the Plan, no interpretation of the Plan or
determination under the Plan, and no exercise of authority or discretion vested
in the Committee under any provision of the Plan (collectively or individually,
a "Change") shall be made if such Change (1) is not required by applicable law,
necessary to meet the requirements of Rule 16b-3, or required to preserve the
qualification of incentive stock options under the Code, and (2) would have the
effect of:

     (i) eliminating, reducing or otherwise adversely affecting a Participant's,
former Participant's or beneficiary's right with respect to any Award (including
without limitation any Award previously deferred and unpaid (including any
appreciation, dividend equivalents, interest, or other earnings thereon) in
accordance with a deferral election made prior to such Change and in accordance
with any investment or payment option permitted (irrespective of any requirement
for approval) pursuant to rules, regulations or procedures in effect on the date
immediately preceding the date on which the Change in Control occurs),

     (ii) altering the meaning or operation of the definition of "Change in
Control" in Section 1.02 hereof (and of the definition of all the defined terms
that appear in the definition of "Change in Control"), the provisions of this
Section 1.07 or Section 1.13 or any rule, regulation, procedure, provision or
determination made or adopted prior to the Change in Control pursuant to this
Section 1.07 or any provision in any rule, regulation, procedure, provision or
determination made or adopted pursuant to the Plan that becomes effective upon
the occurrence of a Change in Control (collectively, the "Change in Control
Provisions"), or

     (iii) undermining or frustrating the intent of the Change in Control
Provisions to secure for Participants, former Participants and beneficiaries the
maximum rights and benefits that can be provided under the Plan.

     Upon and after the occurrence of a Change in Control, all rights of all
Participants, former Participants and beneficiaries under the Plan (including
without limitation any rules, regulations or procedures promulgated under the
Plan) shall be contractual rights enforceable against Donaldson and any
successor to all or substantially all of the Donaldson's business or assets.

SECTION 1.08 WITHHOLDING OF TAX.

     Each participant, as a condition precedent to the issuance of Shares
hereunder, shall make arrangements with Donaldson for payment or withholding of
the amount of any tax required by any government authority to be withheld and
paid by Donaldson to such government authority for the account of the
participant.

SECTION 1.09 EMPLOYMENT.

     Nothing in the Plan and no grant of an Award shall be deemed to grant any
right of continued employment to a participating employee or to limit or waive
any rights of Donaldson to terminate such employment at any time, with or
without cause.

SECTION 1.10 RIGHTS AS SHAREHOLDERS.

     A participating employee shall have no rights whatsoever as a shareholder
of Donaldson with respect to any Shares covered by an Award until the date of
issuance of a stock certificate pursuant to the terms of such Award.

SECTION 1.11 UNFUNDED PLAN.

     The Plan shall be unfunded. Donaldson shall not be required to segregate
any assets that may at any time be represented by Awards made pursuant to the
Plan. Neither Donaldson nor the Board shall be deemed to be a trustee of any
amounts to be paid under the Plan. Any liability of Donaldson to any
Participant, former Participant or beneficiary with respect to an Award shall be
based solely upon contractual obligations created by the Plan and the Award
Agreement. No such obligation shall be deemed to be secured by any pledge of or
any encumbrance on any property of Donaldson.


                                       A-4


<PAGE>


SECTION 1.12 NO FRACTIONAL SHARES.

     No fractional Shares shall be issued pursuant to the Plan or any Award. The
Committee shall determine whether cash, other securities, or other property
shall be paid or transferred in lieu of fractional Shares, or whether fractional
Shares or any rights thereto shall be canceled, terminated or otherwise
eliminated.

SECTION 1.13 CHANGE IN CONTROL. IN THE EVENT OF A CHANGE IN CONTROL OF
DONALDSON:

     (a) any outstanding options and stock appreciation rights granted under the
Plan not previously vested and exercisable shall become fully vested and
exercisable and shall remain exercisable thereafter until they are either
exercised or expire by their terms;

     (b) performance objectives applicable to Awards granted under the Plan
shall be deemed to have been met at 100% of target then prorated on the basis of
the portion of the performance period that has expired; and

     (c) the restrictions applicable to any restricted Shares awarded under the
Plan shall lapse and such Shares shall become fully vested.


                               II. EMPLOYEE AWARDS

SECTION 2.01

     The following types of Awards may be granted under this Part II, singly or
in combination or in tandem with other Awards (or with awards under other plans
of Donaldson) as the Committee may determine. All such Awards shall be in a form
determined by the Committee provided that no Award may be inconsistent with the
terms of the Plan and must be set forth in an Award Agreement.

SECTION 2.02 GRANT OF STOCK OPTIONS.

     Any employee (including officers and employee directors) regularly employed
by Donaldson shall be eligible to receive options hereunder. No option may be
granted to any employee who owns more than 5% of the Common Stock.

     Options shall be evidenced by written Award Agreements. The Award
Agreements, in such form as the Committee shall from time to time approve, shall
contain the terms and conditions of such option including the following:

     (a) TIME OF EXERCISE. An employee may exercise an option at such time or
times as determined by the Committee at the time of the grant; provided,
however, that all rights to exercise an incentive stock option shall expire not
more than ten years after the date such option is granted.

     (b) EXERCISE PRICE. The exercise price per share of Common Stock
deliverable upon the exercise of an option shall be determined by the Committee
at the time of grant and clearly set forth in the Award Agreement; but shall not
be less than the Market Value of the Shares on the date the option is granted.

     (c) EXERCISE OF OPTIONS. To exercise an option in whole or in part, the
Participant employee shall give written notice to Donaldson's Treasurer at the
principal offices of Donaldson of the exercise of the option, stating the number
of Shares with respect to which the Participant is so exercising and
accompanying such notice with full payment of the exercise price for such number
of Shares. Payment of the exercise price may be made in cash or, with the
consent of the Committee, in whole or in part through the delivery or
attestation to the ownership of Common Stock valued at the Market Value on the
day preceding the date of exercise provided that in the case of attestation, the
Shares transferred upon exercise of the option shall be net of the number of
Shares attested to. Subject to rules established by the Committee, the amount of
any tax required to be paid or withheld pursuant to Section 1.08 may be
satisfied by Donaldson withholding Shares issued on exercise having a Market
Value on the day preceding the date of exercise equal to such taxes; provided,
that the number of Shares so withheld shall be rounded up to avoid the necessity
of issuing fractional Shares.

     (d) The Committee may grant "reload" options pursuant to which, subject to
the terms and conditions established by the Committee and any applicable
requirements of Rule 16b-3 or any other applicable law, the Participant would be
granted a new option when the payment of the exercise price of a previously
granted


                                       A-5

<PAGE>


option is made by the delivery or attestation to ownership of Common Stock owned
by the Participant, as described in Section 2.02(c) hereof, which new option (i)
would be an option to purchase the number of Shares provided as consideration
upon the exercise of the previously granted option and (ii) would have a per
share exercise price equal to the Market Value as of the date of grant of the
new option.

SECTION 2.03 STOCK APPRECIATION RIGHTS.

     The Committee may grant stock appreciation rights under the Plan. A Stock
Appreciation Right (SAR) is a right, denominated in Shares, to receive, upon
surrender of the right (or of both the right and a related option in the case of
a tandem right) in whole or in part, but without payment, an amount (payable in
Shares, in cash, or a combination thereof as the Committee shall determine) that
does not exceed the excess of the Market Value on the exercise date of the
number of Shares for which the SAR is exercised over the exercise price of such
right, which exercise price shall not be less than the Market Value for such
Shares on the date the right was granted (or, in the case of an option with
tandem SAR not less than the option price that the optionee otherwise would have
been required to pay for such Shares); provided that, in the case of any SAR
granted retroactively in tandem with or in substitution for another Award (or
any outstanding award granted under any other plan of Donaldson), the exercise
price shall not be less than the Market Value for the number of Shares for which
the SAR is exercised on the date of grant of the other Award (or award). The
exercise of SARs for cash by a Participant who is an officer or a director for
purposes of Sections 16(a) and 16(b) of the Exchange Act or any successor
thereto, shall be subject to the requirements of Rule 16b-3. Upon exercise of a
tandem SAR as to some or all of the Shares covered by the grant, the related
stock option shall be canceled automatically to the extent of the number of
Shares covered by such exercise. If a related stock option is exercised as to
some or all of the Shares covered by the grant, the tandem SAR, if any, shall be
canceled automatically to the extent of the number of Shares covered by the
stock option exercise.

SECTION 2.04 INCENTIVE STOCK OPTIONS.

     At the discretion of the Committee, options granted under Section 2.02
above may be designated incentive stock options in compliance with Section 422
of the Code or any successor section, as it may be amended from time to time,
and the regulations thereunder.

     Incentive stock options shall be evidenced by written Award Agreements and
may be granted only with respect to Shares of Common Stock. The aggregate number
of Shares for which incentive stock options may be granted under the Plan shall
not exceed 1,000,000 Shares of Common Stock, subject in any Plan Year to the
limitations imposed and adjustments required by Section 1.03 hereof and subject
to the adjustment provisions set forth in Section 1.05 hereof. Incentive stock
options may not be granted under the Plan after November 15, 2001.

SECTION 2.05 RESTRICTED STOCK.

     The Committee may grant to any employee restricted stock, for no cash
consideration, if permitted by applicable law, or for such other consideration
as may be determined by the Committee and specified in the Award Agreement which
sets forth the Award. The terms and conditions of Awards of restricted stock
shall be determined by the Committee. Unless otherwise specified in the Award
Agreement, holders of restricted stock shall have the right to vote such Shares
and receive cash and stock dividends on such shares.

     Any restricted stock issued hereunder may be evidenced in such manner as
the Committee in its sole discretion shall deem appropriate, including, without
limitation, bookentry registration or issuance of a stock certificate or
certificates, and may be held in escrow by such party as the Committee in its
sole discretion shall designate. In the event any stock certificate is issued in
respect of restricted stock granted hereunder and not held in escrow, such
certificate shall bear an appropriate legend with respect to the restrictions
applicable to such Award.

SECTION 2.06 OTHER STOCK-BASED AWARDS.

     The Committee may grant Awards (other than the Awards described above)
under the Plan that consist of or are denominated in or payable in, valued in
whole or in part by reference to, or otherwise based on or related to, Shares,
provided that such grants must comply with Rule 16b-3 and other applicable law.
The Committee may subject such Awards to such restrictions on transfer and/or
such other restrictions on incidents of ownership as the Committee may
determine, provided that such restrictions must be consistent


                                       A-6

<PAGE>


with the terms of the Plan. The Committee may grant Awards under this Section
2.06 that require no payment of consideration by the Participant (other than
services previously rendered or, as may be permitted by applicable law, services
to be rendered), either on the date of grant or the date any restriction(s)
thereon are removed. In addition, the Committee may grant Awards under this
Section 2.06 that provide to the Participant the right to purchase Shares,
provided that the purchase price or exercise price, if any, shall in no event be
less than the Market Value for such Shares on the date of grant; provided that,
in the case of any Award granted retroactively in tandem with or in substitution
for another Award (or any outstanding award granted under any other plan of
Donaldson) the purchase price or exercise price, if any, shall not be less than
the Market Value on the date of grant of the other Award (or award).

SECTION 2.07 DOLLAR-DENOMINATED AWARDS.

     The Committee may grant cash Awards under the Plan that are denominated in,
valued by reference to, or otherwise based on or related to, a designated dollar
amount or amounts (including dollar amounts that are determined pursuant to a
formula), as determined by the Committee, and that are determined in accordance
with the achievement of long-term performance criteria applicable to Donaldson,
a Subsidiary, division, operating unit or individual Participant, as determined
by the Committee. Awards granted pursuant to this Section 2.07 shall be payable
only in cash.

SECTION 2.08 DIVIDEND EQUIVALENTS

     The Committee may grant dividend equivalents in respect of Awards. In
respect of any such Award that is outstanding on a dividend record date for the
Shares covered by the Award, the Participant may be credited with an amount
equal to the amount of cash or stock dividends that would have been paid on the
Shares covered by the Award if the covered Shares had been issued and
outstanding on the dividend record date. Subject to the terms of the Plan and
any applicable Award Agreements, the Committee shall establish such rules and
procedures governing the crediting of dividend equivalents, including the timing
and payment contingencies that apply to the dividend equivalents, as the
Committee deems necessary or appropriate and which rules and procedures shall
comply with Rule 16b-3 and other applicable law. Dividend equivalents shall be
paid only in cash.

SECTION 2.09 NON-TRANSFERABILITY OF AWARDS.

     Awards (other than Restricted Shares, the restrictions upon which have
lapsed) are not transferable by an employee other than by will or the laws of
descent and distribution. During the employee's lifetime, stock options and
stock appreciation rights may be exercised only by such employee.
Notwithstanding the above, transferability of stock option grants is permitted
with the approval of the Committee.


                        III. NONEMPLOYEE DIRECTOR AWARDS

SECTION 3.01 ELIGIBLE PARTICIPANTS.

     Each member of the Board from time to time who is not a full time employee
of Donaldson shall be an eligible participant ("Part III Participant") for an
Award under this Part III.


SECTION 3.02 DEFERRED SHARES IN LIEU OF RETAINER OR MEETING FEES.

     (a) AUTOMATIC RECEIPT OF RESTRICTED SHARES. Thirty percent (30%) of the
annual retainer payable to a Part III Participant for service on the Board shall
be payable solely by crediting to such Part III Participant's deferred stock
account (a "Deferred Stock Account") a number of Shares having a Fair Market
Value equal to 30% of such annual retainer. Such Part III Participant shall
receive the Shares held in his or her Deferred Share Account in accordance with
the terms of Section 3.09 below. The Shares shall be issued to a Part III
Participant in accordance with the election made by such Part III Participant
prior to the commencement of the service year for which services will be
rendered to the Board; provided that, if no such election is made, all such
Deferred Shares shall be deferred until such Part III Participant's retirement
from service on the Board.

     (b) ELECTION TO RECEIVE ADDITIONAL RESTRICTED SHARES. Each Part III
Participant shall have the right to elect to receive up to 100% of his or her
annual retainer for services on the Board which would otherwise be payable in
cash (other than fees which have been deferred under the Company's Compensation
Plan for


                                       A-7

<PAGE>


Nonemployee Directors), in the form of Shares. Any part of the annual retainer
elected to be so deferred shall be payable in Shares held in his or her Deferred
Share Account in accordance with the terms of Section 3.09 below. The number of
Shares to be credited to a Part III Participant's Deferred Stock Account
hereunder shall be determined in accordance with Section 3.02(d) of this Plan.
Such election must be made prior to the service year for which the annual
retainer is to be so deferred. Elections under this Subsection 3.02(b) shall
remain in effect from year to year until changed by the Part III Participant. No
change shall be effective until the next service year.

     (c) ELECTION TO RECEIVE DEFERRED SHARES IN LIEU OF MEETING FEES. Each Part
III Participant may also elect to be credited with Shares in lieu of all or any
portion of the meeting fees otherwise payable to such Part III Participant. The
number of Shares to be credited to a Part III Participant's Deferred Stock
Account hereunder shall be determined in accordance with Section 3.02(d) of this
Plan. Such election must be made prior to the service year for which the annual
retainer is to be so deferred. Elections under this Subsection 3.02(c) shall
remain in effect from year to year until changed by the Part III Participant. No
change shall be effective until the next service year.

     (d) CREDITS TO DEFERRED STOCK ACCOUNT FOR ELECTIVE DEFERRALS. On December 1
and on June 1 of each service year (each a "Credit Date"), a Part III
Participant shall receive a credit to his or her Deferred Stock Account. The
amount of the credit on December 1 shall be the number of Shares (rounded to the
nearest one-hundredth of a share) determined by dividing (i) an amount equal to
the portion of the annual retainer fees for the upcoming service year specified
for deferral pursuant to Section 3.04 and the meeting fees payable to such Part
III Participant on such Credit Date for meetings attended since the preceding
Credit Date and specified for deferral pursuant to Section 3.04, by (ii) the
Fair Market Value of one Share on such Credit Date. The amount of the credit on
June 1 shall be the number of Shares (rounded to the nearest one-hundredth of a
share) determined by dividing (i) an amount equal to the meeting fees payable to
such Part III Participant on such Credit Date for meetings attended since the
preceding Credit Date and specified for deferral pursuant to Section 3.04, by
(ii) the Fair Market Value of one Share on such Credit Date.

SECTION 3.03 ISSUANCE OF STOCK IN LIEU OF CASH.

     The Company shall not issue fractional shares; however, fractional shares
will be credited to the Deferred Stock Accounts (rounded to the nearest
one-hundredth share). Whenever, under the terms of this Plan, a fractional share
would be required to be issued, an amount in lieu thereof shall be paid in cash
for such fractional share based upon the same Fair Market Value as was utilized
to determine the number of Shares to be issued on the relevant issue date.

SECTION 3.04 MANNER OF MAKING DEFERRAL ELECTION.

     A Part III Participant may elect to defer payment of a portion of the
annual retainer or meeting fees pursuant to Sections 3.02(b) or (c) of this Plan
by filing, no later than November 15 of each year (or by such other date as the
Administrator shall determine), an irrevocable election with the Administrator
on a form provided for that purpose ("Deferral Election"). The Deferral Election
shall be effective with respect to the annual retainer and meeting fees payable
on or after December 1 of the following service year unless the Part III
Participant shall revoke or change the election in accordance with the procedure
set forth in Section 3.07. The Deferral Election form shall specify an amount to
be deferred expressed as a dollar amount or as a percentage of the Part III
Participant's annual retainer and/or meeting fees payment.

SECTION 3.05 DIVIDEND CREDIT.

     Each time a dividend is paid on the Common Stock, a Part III Participant
shall receive a credit to his or her Deferred Stock Account equal to that number
of shares of Common Stock (rounded to the nearest one-hundredth of a share)
having a Fair Market Value on the dividend payment date equal to the amount of
the dividend payable on the number of Shares credited to the Part III
Participant's Deferred Stock Account on the dividend record date.

SECTION 3.06 FAIR MARKET VALUE.

     For purposes of converting dollar amounts into shares of Common Stock, the
Fair Market Value of each share of Common Stock shall be equal to the closing
price of one share of the Company's Common Stock on


                                       A-8

<PAGE>


the New York Stock Exchange-Composite Transactions on the last business day as
of which Deferred Shares are credited to the Part III Participant's Deferred
Stock Account or the date of issuance of Shares, as the case may be.

SECTION 3.07 CHANGE IN ELECTION.

     Each Part III Participant may irrevocably elect in writing to change an
earlier Deferral Election, either to change the percentage of his or her annual
retainer or meeting fees to be credited in Shares to such Part III Participant's
Deferred Share Account or to receive the entire amount in cash (an "Amended
Election"). Such Amended Election shall not become effective until the December
1 following the date of receipt of such Amended Election by the Company.

SECTION 3.09 DEFERRAL PAYMENT.

     (a) DEFERRAL PAYMENT ELECTION. At the time of making the Deferral Election,
each Part III Participant shall also complete a deferral payment election
specifying one of the payment options described in Sections 3.09(b) and (c), and
the year in which amounts credited to the Part III Participant's Deferred Stock
Account shall be paid in a lump sum pursuant to Section 3.09(b), or in which
installment payments shall commence pursuant to Section 3.09(c). The deferral
payment election shall be irrevocable as to all amounts credited to the Part III
Participant's Deferred Stock Account. The Part III Participant may change the
deferral payment election by means of a subsequent deferral payment election in
writing that will take effect for deferrals credited after the date the Company
receives such subsequent deferral payment election.

     (b) PAYMENT OF DEFERRED STOCK ACCOUNTS IN A LUMP SUM. Unless a Part III
Participant elects to receive payment of his or her Deferred Stock Account in
installments as described in Section 3.09(c), credits to a Part III
Participant's Deferred Stock Account shall be payable in full on December 1 of
the year following the Part III Participant's termination of service on the
Board (or the first business day thereafter) or such other date as elected by
the Part III Participant pursuant to Section 3.09(a). All payments shall be made
in shares of Common Stock plus cash in lieu of any fractional share.
Notwithstanding the foregoing, in the event of a Change in Control, credits to a
Part III Participant's Deferred Stock Account as of the business day immediately
prior to the effective date of the transaction constituting the Change in
Control shall be paid in full to the Part III Participant or the Part III
Participant's beneficiary or estate, as the case may be, in whole shares of
Common Stock (together with cash in lieu of a fractional share) on such date.

     (c) PAYMENT OF DEFERRED STOCK ACCOUNTS IN INSTALLMENTS. A Part III
Participant may elect to have his or her Deferred Stock Account paid in annual
installments following termination of service as a director or at such other
time as elected by the Part III Participant pursuant to Section 3.09(a). All
payments shall be made in shares of Common Stock plus cash in lieu of any
fractional share. All installment payments shall be made annually on December 1
of each year (or the first business day thereafter). The amount of each
installment payment shall be computed as the number of Shares credited to the
Part III Participant's Deferred Stock Account on the relevant installment
payment date, multiplied by a fraction, the numerator of which is one and the
denominator of which is the total number of installments elected (not to exceed
ten) minus the number of installments previously paid. Amounts paid prior to the
final installment payment shall be rounded to the nearest whole number of
Shares; the final installment payment shall be for the whole number of Shares
then credited to the Part III Participant's Deferred Stock Account, together
with cash in lieu of any fractional shares. Notwithstanding the foregoing, in
the event of a Change of Control, credits to a Part III Participant's Deferred
Stock Account as of the business day immediately prior to the effective date of
the transaction constituting the Change of Control shall be paid in full to the
Part III Participant or the Part III Participant's beneficiary or estate, as the
case may be, in whole Shares (together with cash in lieu of a fractional share)
on such date.


SECTION 3.10 LIMITATION ON RIGHTS OF PART III PARTICIPANTS.

     (a) SERVICE AS A DIRECTOR. Nothing in this Plan will interfere with or
limit in any way the right of the Company's Board or its stockholders to remove
a Part III Participant from the Board. Neither this Plan nor any action taken
pursuant to it will constitute or be evidence of any agreement or understanding,
express or implied, that the Company's Board or its stockholders have retained
or will retain a Part III Participant as a director for any period of time or at
any particular rate of compensation.


                                       A-9

<PAGE>


     (b) NONEXCLUSIVITY OF THE PLAN. Nothing contained in this Plan is intended
to effect, modify or rescind any of the Company's existing compensation plans or
programs or to create any limitations on the Board's power or authority to
modify or adopt compensation arrangements as the Board may from time to time
deem necessary or desirable.

     (c) PARTICIPANTS ARE GENERAL CREDITORS OF THE COMPANY. The Part III
Participants and beneficiaries thereof shall be general, unsecured creditors of
the Company with respect to any payments to be made pursuant to this Plan and
shall not have any preferred interest by way of trust, escrow, lien or otherwise
in any specific assets of the Company. If the Company shall, in fact, elect to
set aside monies or other assets to meet its obligations hereunder (there being
no obligation to do so), whether in a grantor's trust or otherwise, the same
shall, nevertheless, be regarded as a part of the general assets of the Company
subject to the claims of its general creditors, and neither any Part III
Participant nor any beneficiary thereof shall have a legal, beneficial or
security interest therein.

SECTION 3.11 SPECIAL ONE-TIME AWARD OF DEFERRED SHARES.

     The following Award is being paid in conjunction with the termination,
effective as of May 21, 1998, of the Company's Independent Director Retirement
and Death Benefit Plan (the "Director Retirement Plan") with respect to all
directors who are members of the Board of Directors on May 21, 1998:

     Each Part III Participant who is a director on May 21, 1998, shall be
awarded a one-time grant, effective on such date, of Shares to his or her
Deferred Stock Account in an amount equal to 115% of the benefits accrued for
such Part III Participant in the Director Retirement Plan as of such date
divided by the Fair Market Value of one Share as of such date. All of such
Shares credited to a Part III Participant's Deferred Stock Account shall be paid
out in three, equal, annual installments, commencing on December 1 of the first
service year in which such Part III Participant is no longer serving as a
director.

SECTION 3.12 RESTRICTED STOCK AWARDS.

     If such grant does not affect the "disinterested administrator" status of
the Committee under Rule 16b-3, the Committee may grant to any Part III
Participant Shares of restricted stock, for no cash consideration, if permitted
by applicable law, or for such other consideration as may be determined by the
Committee and specified in the Award.


                                      A-10

<PAGE>


                                   [LOGO](TM)
                                  DONALDSON(R)


                             DONALDSON COMPANY, INC.
                       ANNUAL MEETING -- NOVEMBER 20, 1998

The undersigned appoints WILLIAM G. VAN DYKE and NORMAN C. LINNELL, and each of
them, as Proxies, each with the power to appoint his substitute, to represent
and vote, as designated below, all shares of the undersigned at the 1998 Annual
Meeting of Stockholders of Donaldson Company, Inc. at The Conference Center at
Atrium Center, 3105 E. 80th Street, Bloomington, Minnesota, at 10:00 a.m.,
Central Time, on Friday, November 20, 1998, and at any adjournment thereof.

In their discretion, the Proxies are authorized to vote upon such other business
as may properly come before the Meeting or any adjournment thereof.

THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED AS DIRECTED OR, IF NO DIRECTION
IS GIVEN, WILL BE VOTED FOR EACH PROPOSAL. THIS PROXY IS SOLICITED ON BEHALF OF
THE BOARD OF DIRECTORS, DONALDSON COMPANY, INC.



              (CONTINUED, AND TO BE SIGNED AND DATED ON OTHER SIDE)

<PAGE>


                  THE BOARD OF DIRECTORS RECOMMENDS VOTES FOR:

1.   ELECTION OF DIRECTORS.

     Nominees: (01)PAUL B. BURKE, (02)KENDRICK B. MELROSE, (03)STEPHEN W. SANGER

               [ ] VOTE FOR all nominees    [ ] WITHHOLD VOTE from all nominees

     To withhold authority to vote for any nominee(s), write the number(s) of
     the nominee(s) in the box to the right.     [_____________________________]


2.   Approve appointment of Ernst & Young LLP as independent auditors. 

                                         [ ] For     [ ] Against     [ ] Abstain

3.   Approve Amendment of 1991 Master Stock Compensation Plan.

                                         [ ] For     [ ] Against     [ ] Abstain



                                        Date _____________________________, 1998


                                        ________________________________________

                                        PLEASE DATE AND SIGN ABOVE exactly as
                                        name appears, indicating, if
                                        appropriate, official position or
                                        representative capacity. If stock is
                                        held in joint tenancy, each joint owner
                                        should sign.

<PAGE>


                                   [LOGO](TM)
                                  DONALDSON(R)


                             DONALDSON COMPANY, INC.
                       ANNUAL MEETING -- NOVEMBER 20, 1998

The undersigned appoints WILLIAM G. VAN DYKE and NORMAN C. LINNELL, and each of
them, as Proxies, each with the power to appoint his substitute, to represent
and vote, as designated below, all shares of the undersigned at the 1998 Annual
Meeting of Stockholders of Donaldson Company, Inc. at The Conference Center at
Atrium Center, 3105 E. 80th Street, Bloomington, Minnesota, at 10:00 a.m.,
Central Time, on Friday, November 20, 1998, and at any adjournment thereof.

In their discretion, the Proxies are authorized to vote upon such other business
as may properly come before the Meeting or any adjournment thereof.

THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED AS DIRECTED OR, IF NO DIRECTION
IS GIVEN, WILL BE VOTED FOR EACH PROPOSAL. THIS PROXY IS SOLICITED ON BEHALF OF
THE BOARD OF DIRECTORS, DONALDSON COMPANY, INC.



              (CONTINUED, AND TO BE SIGNED AND DATED ON OTHER SIDE)

<PAGE>


                                VOTE BY TELEPHONE
                          QUICK *** EASY *** IMMEDIATE
                  CALL TOLL FREE *** ON A TOUCH TONE TELEPHONE
                           1-800-240-6326 --- ANYTIME
[LOGO](TM)                                                   -------------------
DONALDSON(R)                                                  COMPANY #
FILTRATION SOLUTIONS                                          CONTROL #
                                                             -------------------
- --------------------------------------------------------------------------------
Your telephone vote authorizes the named proxies to vote your shares in the same
manner as if you marked, dated, signed and returned your proxy card. The
deadline for telephone voting is noon (ET), November 19, 1998.

AUTOMATED TELEPHONE VOTING INSTRUCTIONS
1.  Using a TOUCH-TONE telephone, dial 1-800-240-6326. Please make sure you stay
    on the line until you receive a confirmation of your vote.
2.  When prompted, enter the 3-digit Company Number located in the box on the
    upper right hand corner of the proxy card.
3.  When prompted, enter your 7-digit numeric Control Number that follows the
    Company Number.
    OPTION #1: To vote as the Board of Directors recommends on ALL proposals:
               Press "1"  When asked, please confirm your vote by pressing 1 --
               THANK YOU FOR VOTING.
    OPTION #2: If you choose to vote on each proposal separately: Press "0"  You
               will hear these instructions:
               Proposal 1: To vote FOR ALL nominees, press "1"; to WITHHOLD FOR
                           ALL nominees, press "9"; to WITHHOLD FOR AN 
                           INDIVIDUAL nominee, press "0" and listen to the 
                           instructions.
               Proposal 2: To vote FOR, press "1"; AGAINST, press "9"; ABSTAIN,
                           press "0"
               Proposal 3: To vote FOR, press "1"; AGAINST, press "9"; ABSTAIN,
                           press "0"

  When asked, please confirm your vote by pressing "1" -- THANK YOU FOR VOTING.
              IF YOU VOTE BY TELEPHONE, DO NOT MAIL BACK YOUR PROXY

                               PLEASE DETACH HERE
- --------------------------------------------------------------------------------


                             DONALDSON COMPANY, INC.

                                 Annual Meeting

                             The Conference Center
                                at Atrium Center
                              3105 E. 80th Street
                             Bloomington, Minnesota

                               NOVEMBER 20, 1998
                            10:00 a.m., CENTRAL TIME


                               PLEASE DETACH HERE
- --------------------------------------------------------------------------------


                  THE BOARD OF DIRECTORS RECOMMENDS VOTES FOR:

1.   ELECTION OF DIRECTORS.

     Nominees: (01)PAUL B. BURKE, (02)KENDRICK B. MELROSE, (03)STEPHEN W. SANGER

               [ ] VOTE FOR all nominees    [ ] WITHHOLD VOTE from all nominees

     To withhold authority to vote for any nominee(s), write the number(s) of
     the nominee(s) in the box to the right.     [_____________________________]


2.   Approve appointment of Ernst & Young LLP as independent auditors. 

                                         [ ] For     [ ] Against     [ ] Abstain

3.   Approve Amendment of 1991 Master Stock Compensation Plan.

                                         [ ] For     [ ] Against     [ ] Abstain

[ ] Mark here for address change and note below.


                                        Date _____________________________, 1998


                                        ________________________________________

                                        PLEASE DATE AND SIGN ABOVE exactly as
                                        name appears, indicating, if
                                        appropriate, official position or
                                        representative capacity. If stock is
                                        held in joint tenancy, each joint owner
                                        should sign.



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