PALL CORP
POS AM, 1997-07-02
GENERAL INDUSTRIAL MACHINERY & EQUIPMENT, NEC
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                                                      Registration No. 333-17417
================================================================================

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

                        POST-EFFECTIVE AMENDMENT NO. 1 ON
                                    FORM S-3
                                       TO
                                    FORM S-4
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933


                          P A L L  C O R P O R A T I O N
             (Exact name of registrant as specified in its charter)

             New York                                    11-1541330
 (State or other jurisdiction of            (I.R.S. Employer Identification No.)
  incorporation or organization)

                             2200 Northern Boulevard
                           East Hills, New York 11548
                                 (516) 484-5400
               (Address, including zip code, and telephone number,
        including area code, of registrant's principal executive offices)

                       Mary Ann Bartlett, Esq., Secretary
                                Pall Corporation
                             2200 Northern Boulevard
                           East Hills, New York 11548
                                 (516) 484-5400
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                   ---------- 
                                    Copy to:
                            CARTER, LEDYARD & MILBURN
                                  2 Wall Street
                          New York, New York 10005-2072
                        Attention: Heywood Shelley, Esq.
                                   ----------




<PAGE>



     Approximate date of commencement of proposed sale to the public:  From time
to time after  February  3, 1997,  the  effective  date of the Merger  described
herein.

     If the only  securities  being  registered  on this Form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. [ ]

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. |X|

     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. [ ]

     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. [ ]

     If the delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box. [ ]

<TABLE>
<CAPTION>
                         CALCULATION OF REGISTRATION FEE
- ---------------------------------------------------------------------------------------------------------------------
                                                              Proposed           Proposed
Title of each                                                 maximum            maximum
class of                                                      offering           aggregate              Amount of
securities to                       Amount to be              price per          offering               registration
be registered                       registered(1)             unit               price                  fee
- ---------------------------------------------------------------------------------------------------------------------
<S>                                <C>                        <C>              <C>                       <C>
Common Stock,
 $.10 par value......              11,307,873 shs.(2)         $24.417645       $276,111,631(3)           $83,670.20(4)

Options to Purchase
 Common Stock........                 634,629 options              --   (5)           --   (5)                -0-

Common Share
 Purchase Rights.......            11,307,873 rights               --   (6)           --   (6)                -0-

- ---------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                        (footnotes on next page)



                                                        ii

<PAGE>



(1)  This  Registration  Statement  is hereby  amended  to reduce  the number of
     shares of the  Registrant's  Common  Stock and the  number of Common  Share
     Purchase  Rights  ("Rights"),  in each case, from 11,323,938 to 11,307,873,
     and to reduce the number of Options to Purchase  Common  Stock  ("Options")
     from 698,144  Options to 634,629  Options.  Accordingly,  the Registrant is
     hereby  removing from  registration  16,065 shares of Common Stock,  16,065
     Rights and 63,515 Options.

(2)  Comprised of 10,606,640  shares of the  Registrant's  Common Stock actually
     issued in  connection  with the  Registrant's  acquisition  by merger  (the
     "Merger")  of  Gelman  Sciences  Inc.  ("Gelman"),  66,604  shares  of  the
     Registrant's  Common  Stock  issued or  issuable  after the Merger upon the
     exercise of  warrants  issued  prior to the Merger to  purchase  the common
     stock of Gelman, and 634,629 shares of the Registrant's Common Stock issued
     or  issuable  after the Merger upon the  exercise of Options  issued by the
     Registrant  in  exchange  for  options  outstanding  prior to the Merger to
     purchase the common stock of Gelman.

(3)  Pursuant to Rule  457(f)(1)  under the Securities Act of 1933, the proposed
     maximum  aggregate  offering price was computed as follows:  8,679,344 (the
     maximum number of shares of Gelman common stock originally  estimated to be
     converted  in the  Merger  and to be issued  upon the  exercise  of certain
     warrants and options to purchase  Gelman common  stock),  multiplied by the
     average  ($31.8125)  of the high and low prices of a share of Gelman common
     stock for American Stock Exchange  composite  transactions  on November 29,
     1996,  the date five  business  days prior to the first filing date of this
     Registration Statement.

(4)  This fee was paid by the  Registrant on December 6, 1996,  the first filing
     date of this Registration  Statement,  to register 11,323,938 shares of the
     Registrant's Common Stock, 698,144 Options and 11,323,938 Rights.

(5)  Pursuant to the last sentence of Rule 457(g), no separate  registration fee
     was required for the Options.

(6)  Included in the offering price of the Common Stock being registered hereby.
     Until the Distribution  Date, as defined in the Rights Agreement  providing
     for the Rights,  the Rights will be transferable only with the Registrant's
     Common  Stock and will be  evidenced  by the  certificates  evidencing  the
     Common Stock. 
                                  ------------

     This  Post-Effective  Amendment shall become  effective on such date as the
Commission,  acting  pursuant to Section 8(c) of the Securities Act of 1933, may
determine.


================================================================================



                                       iii

<PAGE>



PROSPECTUS

                                PALL CORPORATION

                         360,187 SHARES OF COMMON STOCK

     Pall Corporation, a New York corporation ("Pall" or the "Company"),  hereby
offers to sell up to 360,187  shares  (the  "Shares"  or "Pall  Shares")  of its
Common Stock, par value $.10 per share (the "Common Stock"), as follows:  (i) up
to 334,093 Shares upon the exercise of options (the "Pall  Options")  which were
issued in exchange  for certain  options to purchase  the common stock of Gelman
Sciences Inc., a Michigan corporation  ("Gelman"),  and (ii) up to 26,094 Shares
upon the  exercise of warrants  (the  "Warrants")  issued  pursuant to a Warrant
Agreement dated June 6, 1995 (the "Warrant Agreement"), between Gelman and David
H. Fink (the "Grantee").

     The Common Stock is listed on the New York Stock Exchange (symbol: PLL) and
the London Stock Exchange. On _____________,  1997, the last reported sale price
of a share of Common Stock for New York Stock  Exchange  composite  transactions
was $_______.  On June 30, 1997,  127,384,298 shares of Common Stock were issued
and outstanding.

     This  Prospectus  relates to the Shares offered hereby and to a like number
of Common  Share  Purchase  Rights  (the  "Rights"),  which are  attached to and
transferrable  only with the Shares.  See "Description of Common Stock -- Common
Share Purchase Rights."

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
    AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE
  SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED
  UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE
                        CONTRARY IS A CRIMINAL OFFENSE.


                  The date of this Prospectus is _______, 1997.





                                                         

<PAGE>



                                TABLE OF CONTENTS
                                                                            Page
                                                                             No.

AVAILABLE INFORMATION........................................................2
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE..............................3
THE COMPANY..................................................................4
USE OF PROCEEDS..............................................................4
MARKET PRICES OF COMMON STOCK AND DIVIDENDS..................................5
THE PALL OPTIONS.............................................................5
THE WARRANTS.................................................................6
FEDERAL INCOME TAX CONSEQUENCES..............................................8
         The Pall Options....................................................8
         The Warrants.......................................................10
DESCRIPTION OF COMMON STOCK.................................................11
         Voting Rights......................................................11
         Classification of the Board........................................11
         Fair Price Provisions..............................................12
         Common Share Purchase Rights.......................................13
LEGAL MATTERS...............................................................14
EXPERTS.....................................................................15
EXHIBIT A - Form of Pall Option............................................A-1


                              AVAILABLE INFORMATION

     The Company is subject to the informational  requirements of the Securities
Exchange  Act of  1934,  as  amended  (the  "Exchange  Act")  and in  accordance
therewith files reports and other  information  with the Securities and Exchange
Commission (the  "Commission").  Such reports and other information,  as well as
the Registration Statement referred to below, can be inspected and copied at the
Public  Reference  Section of the  Commission's  office at Room 1024,  450 Fifth
Street, N.W.,  Washington,  D.C. 20549, and at the Commission's regional offices
in New York (7 World Trade  Center,  13th Floor,  New York,  New York 10048) and
Chicago (Citicorp Center, 14th Floor, 500 West Madison Street, Chicago, Illinois
60661).  Copies of such  reports  and  information  may be  obtained  by mail at
prescribed  rates from the Public  Reference  Section of the  Commission  at 450
Fifth Street,  N.W.,  Washington,  D.C. 20549, as well as from the  Commission's
Website at  http://www.sec.gov.  Such reports and other  information can also be
inspected at the offices of the New York Stock  Exchange,  20 Broad Street,  New
York, New York 10005.

     This  Prospectus  is part of a  Post-Effective  Amendment  on Form S-3 to a
Registration  Statement on Form S-4  (Registration  No.  333-17417) filed by the
Company with the  Commission  under the  Securities Act of 1933, as amended (the
"Securities Act"). Reference is hereby made to the Registration Statement, as so
amended,  and the exhibits thereto for further  information with respect to Pall
and the Shares offered hereby.





                                        2

<PAGE>



                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         The following  documents  previously  filed by Pall with the Commission
(Commission File No. 1-4311) are incorporated herein by reference:

     (a)  Pall's  Annual Report on Form 10-K for the fiscal year ended August 3,
          1996;

     (b)  Pall's Quarterly  Reports on Form 10-Q for the quarterly periods ended
          November 2, 1996, February 1, 1997, and May 3, 1997;

     (c)  Pall's Current  Reports on Form 8-K bearing cover dates of February 3,
          1997, and March 19, 1997; and

     (d)  The  descriptions of the Common Stock and the Rights  contained in the
          Company's  Registration  Statements on Form 8-A, both dated  September
          10,  1992,  for the  registration  of the Common  Stock and the Rights
          pursuant to Section 12(b) of the Exchange Act, and any updates of such
          descriptions  contained  in  any  registration  statement,  report  or
          amendment thereto of Pall hereafter filed under the Exchange Act.

     All documents filed by Pall with the Commission  pursuant to Section 13(a),
13(c), 14 or 15(d) of the Exchange Act subsequent to the date of this Prospectus
and prior to the  termination  of the  offering  of the Shares  hereby  shall be
deemed to be  incorporated  by  reference  in this  Prospectus  and to be a part
hereof from the date of filing of such documents.  Any statement  contained in a
document  incorporated or deemed to be incorporated by reference herein shall be
deemed to be modified or  superseded  for  purposes of this  Prospectus,  to the
extent  that a statement  contained  herein or in any other  subsequently  filed
document  which  also is or is deemed to be  incorporated  by  reference  herein
modifies  or  supersedes  such  statement.  Any such  statement  so  modified or
superseded  shall  not be  deemed,  except  as so  modified  or  superseded,  to
constitute a part of this Prospectus.

     The Company  will provide  without  charge to each  person,  including  any
beneficial  owner,  to whom this  Prospectus is delivered,  upon written or oral
request of any such person, a copy of any or all of the abovementioned documents
incorporated  herein by reference  (other than exhibits to such documents unless
such exhibits are  specifically  incorporated by reference into such documents).
Written or telephone  requests  should be directed to the  Corporate  Secretary,
Pall Corporation, 2200 Northern Boulevard, East Hills, New York 11548 (Telephone
(516) 484-5400).





                                        3

<PAGE>



                                   THE COMPANY

     Pall,  a New York  corporation  organized in 1946,  is a leading  worldwide
supplier  of fine  filters,  mainly made by Pall using its  high-quality  filter
media, and other fluid clarification  equipment for the removal of solid, liquid
and  gaseous  contaminants  from a wide  variety  of liquids  and gases.  Pall's
principal  products are sold to the aeropower,  fluid  processing and healthcare
industries.  Pall supplies aeropower  filtration  products to the commercial and
military aircraft market, including power generation plants and manufacturers of
aluminum, steel, paper, automobiles, injection-molded parts and mobile equipment
such as trucks and  earthmoving  machinery.  These  filtration  products  remove
particulates  and water from  hydraulic  and  lubrication  fluids  and  systems,
thereby  extending  their  useful  lives,  minimizing  waste  for  disposal  and
increasing overall  productivity.  Pall's fluid processing  products are used to
remove  microscopic  and  larger  contaminants  by  producers  of oil  and  gas,
electricity,  chemicals, plastics,  semiconductors,  photographic film, magnetic
storage devices, thin film rigid discs, ink jet printers, computer terminals and
disc  drives.   Pall's  healthcare  filters  protect  patients  receiving  blood
transfusions and undergoing open-heart surgery,  organ transplants,  intravenous
feeding and breathing  therapy.  These filters are used extensively in hospitals
and in blood  centers  to protect  from  particulates,  bacteria,  and viral and
foreign leukocyte  contamination.  Manufacturers of pharmaceuticals,  biopharma-
ceuticals,  blood fractions,  therapeutic biologicals and food and beverages, as
well as producers of diagnostic tests and users of  laboratory-scale  filtration
devices, purchase Pall's filtration systems, validation services and proprietary
membranes.

     On February 3, 1997, the Company  acquired Gelman Sciences Inc., a Michigan
corporation  ("Gelman"),  through a merger of Pall  Acquisition  Corporation,  a
wholly-owned subsidiary of Pall, with and into Gelman (the "Merger").  Gelman is
a  manufacturer  and  marketer  of a  broad  line of  specialty  microfiltration
products  for the  separation  and  purification  of liquids  and gases.  In the
Merger,  Gelman became a  wholly-owned  subsidiary of Pall and each  outstanding
share (a "Gelman Share") of Gelman's common stock, par value $.10 per share, was
converted into the right to receive 1.3047 shares of Common Stock.  An aggregate
of 10,606,640 shares of Common Stock were issued in the Merger.

     Pall's principal  executive offices are located at 2200 Northern Boulevard,
East Hills, New York 11548; telephone (516) 484-5400.


                                 USE OF PROCEEDS

     The Company intends to use the net proceeds from the sale of the Shares for
general corporate purposes,  which may include reduction of debt, funding Pall's
capital expenditure program and working capital.




                                        4

<PAGE>



                   MARKET PRICES OF COMMON STOCK AND DIVIDENDS

     The  principal  market on which the Common  Stock is traded is the New York
Stock  Exchange  under the symbol  "PLL." The Common Stock is also listed on the
London  Stock  Exchange.  The  following  table  presents the high and low sales
prices of a share of Common  Stock during the calendar  quarters  indicated,  as
reported for New York Stock Exchange composite transactions:


                                                          High          Low
                                                          ----          ---
1995
- ----
First quarter .........................................  $21 3/4      $18 3/8
Second quarter.........................................   24           20 3/8
Third quarter..........................................   23 7/8       20 1/8
Fourth quarter.........................................   27 7/8       21 7/8
1996
- ----
First quarter .........................................   29 3/8       23 1/4
Second quarter.........................................   29 1/4       22 7/8
Third quarter .........................................   28 1/4       19 5/8
Fourth quarter.........................................   28           24 1/4
1997
- ----
First quarter .........................................   26 1/8       20 3/4
Second quarter.........................................   24 3/4       22 1/8
Third quarter (through July __)........................

     See the cover page of this Prospectus for a recent sale price of the Common
Stock.

     The Company paid cash  dividends  on its Common  Stock during  fiscal 1995,
1996 and the first  three  quarters of fiscal  1997 at the  following  quarterly
rates:  $0.0925 per share in the first  quarter of fiscal 1995,  $0.105 from the
second quarter of fiscal 1995 through the first quarter of fiscal 1996,  $0.1225
from the second quarter of fiscal 1996 through the first quarter of fiscal 1997,
and $0.135 in the  second and third  quarters  of fiscal  1997.  There can be no
assurance as to the frequency and amount of future dividends.


                                THE PALL OPTIONS

     In  connection  with the  Merger,  Pall  offered  each  Gelman  employee or
director who held options to purchase Gelman common stock ("Gelman Options") the
opportunity  to  exchange  each of his or her  Gelman  Options  for an option to
purchase Pall Shares (a "Pall Option"). Accordingly,  promptly after the closing
of the  Merger,  Pall issued Pall  Options to purchase an  aggregate  of 634,629
shares of Common Stock; of these options, 113 Pall Options to purchase



                                        5

<PAGE>



an aggregate of 334,093 shares of Common Stock remain outstanding on the date of
this Prospectus.

     The substantive  terms and conditions of each Pall Option are substantially
the same as the terms and  conditions  of the Gelman  Option for which such Pall
Option  was  exchanged.  For  example,  each Pall  Option  has the same  vesting
schedule and  expiration  date as the Gelman Option for which it was  exchanged,
except that all the Pall Options  granted to Messrs.  Charles  Gelman and Kim A.
Davis will expire on  February  3, 2002.  The form of Pall Option is attached to
this Prospectus at Exhibit A, and the following summary of the material terms of
the Pall Options is qualified in its entirety by reference to Exhibit A.

     The  purchase  price per Pall  Share  upon  exercise  of a Pall  Option was
determined  by  dividing  the  exercise  price per Gelman  Share  issuable  upon
exercise of the related Gelman Option by 1.3047, the "Exchange Ratio" (i.e., the
number of Pall Shares exchanged for each Gelman Share in the Merger). The number
of Pall  Shares  issuable  upon  exercise  of a Pall  Option was  determined  by
multiplying  the number of Gelman  Shares  issuable upon exercise of the related
Gelman Option by the Exchange Ratio.

     The Pall Options are being  administered by the  Compensation  Committee of
Pall's Board of Directors  (the  "Committee").  The exercise  price payable upon
exercise  of a Pall  Option  must be paid in cash or,  with the  consent  of the
Committee,  by  delivery of shares of Common  Stock  having a value equal to the
exercise price, or partly in cash and partly by delivery of shares.


                                  THE WARRANTS

     In connection with the Merger, the Warrants were automatically converted in
accordance with their terms into warrants to purchase 26,094 Pall Shares,  which
number was  determined  by  multiplying  20,000  (the number of shares of Gelman
common stock  issuable upon exercise of the Warrants prior to the Merger) by the
Exchange Ratio. The Warrant  exercise price per Share is $17.3603,  which amount
was determined by dividing  $22.65 (the exercise price per Gelman share prior to
the Merger) by the Exchange Ratio.

     The following summary of the material terms of the Warrants is qualified in
its entirety by reference to the Warrant Agreement,  an additional copy of which
will be furnished to the Grantee or any Permitted Assignee (as defined below) at
his or her request.

1.   The Warrants are  currently  exercisable  as to 18,266 Pall Shares and will
     become fully exercisable (as to 26,094 Shares) on January 1, 1998.

2.   The Warrants  will expire (to the extent not  previously  exercised) on the
     earlier  of June 6,  2000  and  the  date  determined  in  accordance  with
     paragraph 4 below (the "Expiration Date").



                                        6

<PAGE>




3.   The  Warrants  (to the extent  then  exercisable)  may be  assigned  by the
     Grantee, in whole or in part, at any time prior to the Expiration Date only
     to Daniel S. Cooper,  Mark J. Zausmer,  Trudy E. Fink, any of the Grantee's
     minor  children,  and Mr. and Mrs.  Samuel R. Fink,  or any of them (each a
     "Permitted   Assignee").   Each  assignment  to  a  Permitted  Assignee  is
     conditioned  on that Permitted  Assignee's  agreeing in writing to abide by
     the terms of the Warrant Agreement as if he or she were a party thereto. If
     assigned,   the  Warrants  (to  the  extent  then  exercisable)   shall  be
     exercisable,  prior to the Expiration Date, only by a Permitted Assignee or
     any  person  taking  from a  Permitted  Assignee  by will or by the laws of
     descent and distribution.

4.   The  Warrants,  to the  extent  they  are  exercisable  on the  date of the
     Grantee's  death,  may be exercised for a period of 180 days  following the
     Grantee's death, but in no event subsequent to June 6, 2000, by a Permitted
     Assignee or by the Grantee's legal representatives or the person or persons
     to whom the  Grantee's  rights shall pass by will or by the laws of descent
     and  distribution.  The Grantee's  legal  representative,  or the person or
     persons to whom the  Grantee's  rights shall pass by will or by the laws of
     descent and  distribution,  may not assign the  Warrants  without the prior
     written consent of Pall.

5.   The Warrants shall be exercised by giving a written notice to the Secretary
     of Pall.  Such notice shall  specify the number of Shares to be  purchased,
     the name in which  the  Grantee  desires  to have the  Shares  issued,  and
     Grantee's  address and social security number,  and shall be accompanied by
     payment in full in cash of the aggregate  exercise  price for the number of
     Shares  purchased.  Such exercise  shall be effective  only upon the actual
     receipt by the Secretary of such written  notice and cash, and no rights or
     privileges of a shareholder  of the Company in respect of any of the Shares
     issuable  upon  exercise  of any part of the  Warrants  shall  inure to the
     Grantee or any other person who is entitled to exercise the Warrants unless
     and until certificates representing such Shares shall have been issued.

6.   If, upon or as a result of Grantee's exercise of the Warrants,  there shall
     be payable by Pall any amount for income tax withholding,  the Grantee will
     pay such amount to Pall to reimburse it for such income tax withholding.

7.   In the event that the outstanding shares of Common Stock shall be increased
     by a stock dividend or changed into or exchanged for a different  number or
     kind of  shares  of  stock  or  other  securities  of  Pall  or of  another
     corporation, whether by reason of merger, consolidation,  recapitalization,
     reclassification, split-up, combination of shares or otherwise, the number,
     price and kind of Shares  subject to the  Warrants  shall be  appropriately
     adjusted.







                                        7

<PAGE>



                         FEDERAL INCOME TAX CONSEQUENCES

     In the opinion of Carter,  Ledyard & Milburn,  counsel to the Company,  the
following  is a  summary  of the  material  United  States  federal  income  tax
considerations  relating to the Pall Options and the Warrants. This summary does
not  purport  to be a  complete  description  of such  considerations,  and each
optionee  or  Warrantholder  is advised to  consult  his or her own tax  adviser
before exercising a Pall Option or the Warrants, or disposing of Shares acquired
pursuant to the exercise of a Pall Option or the Warrants.

The Pall Options

     The exchange of Gelman Options for Pall Options was not a taxable event for
United States federal income tax purposes.

     Each Pall Option is either an incentive  stock option within the meaning of
Section 422 of the  Internal  Revenue  Code of 1986,  as amended (an  "Incentive
Option"),  or an  option  which  does not  qualify  as an  Incentive  Option  (a
"Nonqualified Option").  Different tax consequences attach to these two types of
options.

     Nonqualified Options

     Upon exercise of a Nonqualified  Option for cash,  the optionee  recognizes
ordinary  income in an amount  equal to the  excess,  if any, of the fair market
value,  on the date of exercise,  of the shares  purchased  over their  exercise
price.  If, with consent of the Committee,  an optionee pays the option exercise
price by delivering shares of Common Stock already owned by such optionee,  such
delivery  would  constitute  a  non-taxable  exchange by the  optionee,  and the
optionee would  recognize  ordinary income in an amount equal to the fair market
value of the  additional  shares  received  (i.e.,  above  the  number of shares
delivered).  Optionees  are  especially  urged to consult their own tax advisers
before  paying the exercise  price of an option by  delivering  shares of Common
Stock already owned.

     Since all holders of currently  outstanding  Pall Options were employees of
Gelman or a subsidiary at the time the options were granted, any ordinary income
recognized upon exercise of a Nonqualified  Option will be classified as taxable
wages subject to federal and state income tax  withholding  and social  security
withholding,  which  withholding  taxes will be due and  payable at the time the
option is exercised.  At Pall's request, upon exercise of a Nonqualified Option,
the  optionee  will be  required  to pay to Pall an amount  equal to 28% of such
ordinary  income  for  federal  income  tax  withholding   purposes  and,  where
applicable, an appropriate percentage for state and local income tax withholding
purposes,  to cover the amount of income tax withholding  which Pall is required
to pay.




                                        8

<PAGE>



     Pall will be entitled to an income tax  deduction  in the same amount that,
and for Pall's taxable year in which,  the optionee  recognizes  ordinary income
from the exercise of a Nonqualified Option.

     Upon a sale of Shares  purchased on the exercise of a Nonqualified  Option,
the  optionee  will  recognize  short-term  or  long-term  capital gain or loss,
depending  on whether  the Shares are held for more than one year after the date
of exercise.  Such gain or loss will be measured by the  difference  between the
selling  price of the Shares  and the market  price of the Shares on the date of
exercise.

     Incentive Options

     In general, the holder of an Incentive Option does not recognize any income
at the time the option is  exercised  (although  the  exercise  of an  Incentive
Option can have  "alternative  minimum  tax"  consequences  to the  optionee  as
described below under the caption " -- Alternative Minimum Tax"). If an optionee
holds Shares purchased upon exercise of an Incentive Option for at least (i) two
years after the date the related  Gelman  Option was granted to the optionee and
(ii) one year after the date such Shares are  transferred to the optionee,  then
any gain or loss in respect of a  subsequent  disposition  of such  Shares  will
generally be treated as a long-term  capital gain or loss. In the event that the
optionee  disposes of Shares purchased upon exercise of an Incentive Option (for
this purpose a  disposition  includes a sale,  exchange,  gift or certain  other
transfers of legal title but not a mere pledge)  before the end of such two- and
one-year  periods  (any  such   disposition   being  herein  referred  to  as  a
"disqualifying  disposition"),  then the excess,  if any, of the aggregate  fair
market value of such Shares on the date on which the option was  exercised  over
the aggregate  exercise price of such Shares will be treated as ordinary  income
to the  optionee  in the  year of the  disqualifying  disposition,  unless  such
disqualifying  disposition  is a sale or exchange  for less than the fair market
value of such Shares on the date of  exercise  of the option,  in which case the
amount that will be so treated as ordinary income will be limited to the excess,
if any, of the  aggregate  amount  realized  upon such sale or exchange over the
aggregate exercise price of the shares so sold or exchanged.

     In the  event  that a  disqualifying  disposition  of  Shares  is a sale or
exchange  for more  than the fair  market  value of such  Shares  on the date of
exercise of the Incentive  Option,  the excess of the aggregate  amount realized
upon such sale or exchange over the  aggregate  fair market value of such Shares
on the date of  exercise  will be treated as a capital  gain.  Such gain will be
treated as long-term capital gain if the Shares have been held for more than one
year at the time of the disqualifying  disposition and otherwise will be treated
as short-term  capital gain. In the event that a disqualifying  disposition is a
sale or exchange for less than the aggregate  exercise price of such Shares,  no
ordinary income will be realized by the optionee, and the difference between the
aggregate amount realized upon such sale or exchange and such aggregate exercise
price will be treated as a long-term or short-term capital loss,  depending upon
whether  such  shares  have or have not been  held for more than one year at the
time of such sale or exchange.

     The rules described above relating to  disqualifying  dispositions  may not
apply to certain  transfers -- for example,  transfers by bequest or incident to
divorce.




                                        9

<PAGE>



     Pall will not be entitled to any federal  income tax deduction with respect
to the exercise of an Incentive  Option,  but may be entitled,  in the year of a
disqualifying disposition,  to a deduction equal to the amount, if any, that the
optionee must treat as ordinary income.

     If, with the consent of the Committee, an optionee pays the option exercise
price by delivering shares of Common Stock already owned by such optionee,  such
delivery would  constitute a non-taxable  exchange by the optionee and would not
affect the Incentive  Option status of the Shares purchased upon exercise of the
option. However, if the shares delivered in payment had previously been acquired
upon  exercise of an  Incentive  Option and were not  subsequently  held for the
requisite one- and two-year  periods,  the delivery of such shares in payment of
the exercise price of an option would constitute a disqualifying  disposition of
the shares so delivered. Optionees are especially urged to consult their own tax
advisers  before paying the exercise price of an Incentive  Option by delivering
shares of Common Stock already owned.

     In the event an  optionee  exercises  an  Incentive  Option more than three
months  (one  year if the  optionee  is  disabled)  after  employment  with Pall
terminates,  the tax  treatment  with respect to the option is the same as for a
Nonqualified Option (discussed above).

     Alternative Minimum Tax

     The Internal Revenue Code imposes an alternative  minimum tax determined by
applying  a  special  tax  rate  to  the  excess,  if  any,  of an  individual's
"alternative   minimum  taxable  income"  over  a  specified  exemption  amount.
Alternative  minimum taxable income includes the amount by which the fair market
value of Shares  acquired  through  exercise of an Incentive  Option exceeds the
exercise price. In addition, the basis of any Shares so acquired for determining
gain or loss for  purposes  of the  alternative  minimum tax will be the Shares'
fair market value at exercise.  In the event of a  disqualifying  disposition of
the Shares in the year the Incentive Option is exercised,  the amount includible
as  alternative  minimum  taxable  income is  limited to the excess of the sales
price over the exercise price.

The Warrants

     Pall  intends to treat the  Warrants  for income tax  purposes  in a manner
consistent  with  its view  that  the  grant of the  Warrants  was  intended  as
compensation for personal  services  rendered and to be rendered by the Grantee.
Under this  approach,  the  Grantee  will have  ordinary  income at the time the
Warrants  are  exercised,  equal to the  difference  between (a) the fair market
value of the Shares  acquired upon such exercise and (b) the sum of the purchase
price for the Warrants ($2.169 per Warrant, or $56,600 in the aggregate) and the
amount of cash paid upon such exercise.  The holding  period of Shares  acquired
upon the exercise of the Warrants will begin on the day following exercise.  The
Grantee is urged to consult his own tax adviser  regarding the tax  consequences
of the conversion of the Warrants,  from warrants to purchase Gelman shares into
warrants to purchase Pall Shares in connection with the Merger, and the exercise
or lapse of the Warrants.




                                       10

<PAGE>



                           DESCRIPTION OF COMMON STOCK

     The  authorized  capital  stock of Pall consists of  500,000,000  shares of
Common  Stock,  par  value  $0.10  per  share  (the  "Common  Stock"),  of which
127,384,298  shares were issued and  outstanding on June 30, 1997. The rights of
the holders of Common Stock are governed by the Business  Corporation Law of the
State of New York (the  "NYBCL") and Pall's  certificate  of  incorporation  and
by-laws.

     Holders  of Common  Stock are  entitled  to receive  dividends  when and as
declared by Pall's Board of Directors out of funds legally  available  therefor.
In the event of the liquidation,  dissolution or winding up of Pall,  holders of
Common  Stock  would  be  entitled  to share  ratably  in all  corporate  assets
available for distribution to shareholders.  The holders of Common Stock are not
subject  to  further  calls  or  assessments  by Pall  and  have no  preemptive,
subscription or conversion rights. The Common Stock is not redeemable.

Voting Rights

     The  holders  of  Common  Stock are  entitled  to one vote per share on all
matters  submitted  to  shareholders,  and  the  holders  of a  majority  of the
outstanding shares constitute a quorum at any meeting of shareholders.

     Directors of Pall are elected by a plurality of the votes cast at a meeting
of  shareholders.  The Common  Stock  does not have  cumulative  voting  rights;
therefore,  the holders of a majority of the outstanding  shares of Common Stock
can elect all directors of Pall.

     In general, shareholder action other than the election of directors must be
authorized  by a  majority  of the  votes  cast at a  meeting  of  shareholders.
However, the NYBCL provides that certain extraordinary matters, such as a merger
or  consolidation  in which Pall is a constituent  corporation,  a sale or other
disposition of all or substantially all of Pall's assets, and the dissolution of
Pall,  would require the vote of the holders of  two-thirds  of all  outstanding
shares. Most amendments to Pall's certificate of incorporation  require the vote
of the holders of a majority of all outstanding shares.

Classification of the Board

     The Pall by-laws provide that the Board of Directors  (currently  comprised
of twelve  persons)  shall be divided into three  classes of  directors  serving
staggered  three-year  terms,  such  classes  being as nearly equal in number as
possible.  As a result,  one-third  of Pall's Board of Directors is elected each
year.




                                       11

<PAGE>



Fair Price Provisions

     Pall's certificate of incorporation  contains provisions designed to assure
fair treatment for all shareholders of Pall in certain  "Business  Combinations"
involving a "Related  Party,"  defined as either the beneficial  owner of 20% or
more of the securities entitled to vote in the election of Pall's directors,  or
an  affiliate  of  Pall  who  was the  beneficial  owner  of 20% or more of such
securities at any time within the preceding five years.  "Business  Combination"
is defined broadly to include (i) any merger or  consolidation of Pall or any of
its subsidiaries into or with a Related Person or its affiliates,  (ii) any sale
or other disposition of more than 5% in value of the consolidated assets of Pall
and its  subsidiaries to a Related Person or its affiliates,  or more than 5% of
the  assets  of a  Related  Person to Pall or its  subsidiaries,  (iii)  certain
issuances  and  transfers  by  Pall  or its  subsidiaries  of  their  respective
securities to a Related  Person,  and (iv) any  reclassification  of securities,
recapitalization,  reorganization  or similar  transaction which has the effect,
directly or indirectly, of increasing the proportionate share of the outstanding
shares of any  class of equity  security  of Pall or its  subsidiaries  which is
directly or indirectly owned by a Related Person.

     Any Business Combination is subject to the prior approval of the holders of
not less than 85% of all outstanding  shares of Common Stock unless certain fair
price and procedural  requirements are met.  Approval by the holders of not less
than 85% of the outstanding  shares of Common Stock is also required to amend or
repeal  the  provisions  in Pall's  certificate  of  incorporation  relating  to
Business Combinations,  unless at least 75% of certain "continuing" directors of
Pall shall  recommend  such  amendment or repeal,  in which case the approval of
only the holders of a majority of the  outstanding  shares of Common Stock would
be required under the NYBCL to amend or repeal such provisions.

     In  addition,  under  Section  912 of the  NYBCL,  Pall may not engage in a
"business  combination" (the statutory definition of which is similar to that in
Pall's  certificate  of  incorporation)  with an "interested  shareholder"  (the
statutory definition of which is similar to the definition of "Related Party" in
Pall's  certificate  of  incorporation)  for a period  of five  years  after the
interested  shareholder  becomes such,  unless the business  combination  or the
purchase of stock by means of which the interested  shareholder  becomes such is
approved by Pall's Board of Directors in advance of such stock  purchase.  After
the  five-year  period,  an  interested  shareholder  may  engage in a  business
combination with Pall only if (i) the business combination is approved after the
five-year  period by the  affirmative  vote of the  holders of a majority of the
outstanding  shares of Common  Stock not  beneficially  owned by the  interested
shareholder  and its  affiliates  and  associates,  or  (ii)  the  value  of the
aggregate  consideration to be paid by the interested  shareholder in connection
with the  business  combination  satisfies  certain  formulas  specified  in the
statute, and the interested  shareholder,  after becoming such, has not acquired
any additional shares of Common Stock, except as provided in the statute.




                                       12

<PAGE>



Common Share Purchase Rights

     On November 17, 1989, the Pall Board of Directors,  pursuant to a favorable
advisory vote of Pall's  shareholders,  adopted a  Shareholders  Rights Plan and
pursuant  thereto  declared a dividend  of one Common  Share  Purchase  Right (a
"Right") for each outstanding  share of Common Stock. The dividend  distribution
was made to the  holders of record of Common  Stock  outstanding  on December 1,
1989,  and is being  made with  respect  to all  shares of Common  Stock  issued
thereafter  until the  earliest  to occur of the  Distribution  Date (as defined
below),  the date on which the Rights are redeemed,  and the expiration  date of
the Rights (December 1, 1999, unless the expiration date is extended).

     The  "Distribution  Date" is defined as the earlier to occur of (i) 10 days
following  a public  announcement  that a  person  or  group  of  affiliated  or
associated  persons  (other than Pall,  any  subsidiary  of Pall,  any  employee
benefit plan of Pall or of any  subsidiary of Pall, or any entity holding Common
Stock  for or  pursuant  to the  terms of such  plan)  has  acquired  beneficial
ownership of 20% or more of the outstanding  shares of Common Stock (such person
or group being defined as the "Acquiring Person"),  or (ii) 10 business days (or
later date as may be  determined by action of Pall's Board prior to such time as
any person or group becomes an Acquiring  Person) following the commencement of,
or  announcement  of an intention to make, a tender offer or exchange  offer the
consummation  of which would result in the  beneficial  ownership by a person or
group (other than Pall,  any  subsidiary of Pall,  any employee  benefit plan of
Pall or of any  subsidiary  of Pall, or any entity  holding  Common Stock for or
pursuant to the terms of such plan) of 20% or more of such outstanding shares of
Common Stock.

     Until the Distribution  Date, the Rights (i) will not be exercisable,  (ii)
will be evidenced by the  certificates  for the Common Stock  registered  in the
names of the holders thereof and not by separate Rights certificates,  and (iii)
will be transferable  with and only with the Common Stock, and one Right will be
associated  with each share of Common Stock,  subject to  adjustments in certain
events.  Each Right,  when it becomes  exercisable,  will entitle the registered
holder to purchase from Pall one share of Common Stock at a price of $60,  which
price reflects stock splits declared from November 17, 1989, through the date of
this  Prospectus,  and is subject to further  adjustment in certain  events (the
"Purchase  Price").  As soon as  practicable  following the  Distribution  Date,
separate  certificates  evidencing the Rights  ("Rights  Certificates")  will be
mailed to holders of record of the Common  Stock as of the close of  business on
the Distribution Date and such separate Right  Certificates  alone will evidence
the Rights.

     In the  event  that  Pall is  acquired  by any  person in a merger or other
business combination  transaction,  or 50% or more of its consolidated assets or
earning power are sold,  proper  provision will be made so that each holder of a
Right will  thereafter have the right to receive,  upon the exercise  thereof at
the then current  exercise  price of the Right,  that number of shares of common
stock of the acquiring company which at the time of such transaction will have a
market value of two times the exercise price of the Right. In the event that (i)
any person becomes an Acquiring  Person, or (ii) during such time as there is an
Acquiring Person, there shall be a reclassification of



                                       13

<PAGE>



securities  or  a  recapitalization   or  a  reorganization  of  Pall  or  other
transaction  or series of  transactions  involving  Pall which has the effect of
increasing by more than 1% the proportionate  share of the outstanding shares of
any class of equity  securities of Pall or any of its subsidiaries  beneficially
owned by the  Acquiring  Person,  proper  provision  shall be made so that  each
holder of a Right, other than Rights  beneficially owned by the Acquiring Person
(which will thereafter be void),  will thereafter have the right to receive upon
exercise  that number of shares of Common  Stock (or other  securities,  cash or
property) having a market value of two times the exercise price of the Right.

     At any time after any person  becomes an Acquiring  Person and prior to the
acquisition by a person or group (other than Pall, any employee  benefit plan of
Pall or of any  subsidiary of Pall, or any entity holding shares of Common Stock
for or pursuant  to the terms of such plan) of  beneficial  ownership  of 50% or
more of the  outstanding  shares  Common  Stock  (other  than  shares into which
nonvoting  securities of Pall beneficially  owned by such person or group can be
converted),  the Board of Directors of Pall may exchange the Rights  (other than
Rights owned by such person or group which will have become  void),  in whole or
in part, at an exchange ratio of one share of Common Stock per Right (subject to
adjustment).

     At any time prior to such time as any person or group  becomes an Acquiring
Person,  the Board of Directors of Pall may redeem the Rights in whole,  but not
in part, at a price of one-third of a cent per Right, which price reflects stock
splits declared from November 17, 1989,  through the date of this Prospectus and
is subject to further adjustment in certain events (the "Redemption Price"). The
redemption  of the Rights may be made  effective at such time, on such basis and
with  such  conditions  as the Board of  Directors  in its sole  discretion  may
establish.  Immediately upon any redemption of the Rights, the right to exercise
the Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.

     The terms of the Rights may be  amended by the Board of  Directors  of Pall
without the  consent of the  holders of the  Rights,  except that from and after
such time as any person  becomes an  Acquiring  Person,  no such  amendment  may
adversely affect the interests of the holders of the Rights.

     Until a Right is  exercised,  the  holder  thereof,  as such,  will have no
rights as a shareholder of Pall,  including,  without  limitation,  the right to
vote or to receive dividends.


                                  LEGAL MATTERS

     Certain legal matters with respect to the Shares and Rights  offered hereby
were  passed upon for the Company by Carter,  Ledyard & Milburn,  New York,  New
York. Heywood Shelley, a member of the firm of Carter,  Ledyard & Milburn,  is a
director  of the  Company,  owns 3,500  shares of Common  Stock and has  options
exercisable  within 60 days of the date of this  Prospectus  to purchase  33,333
shares of Common Stock.




                                       14

<PAGE>



                                     EXPERTS

     The  consolidated   financial   statements  of  Pall  Corporation  and  its
subsidiaries  incorporated  in this Prospectus by reference to the Annual Report
on Form 10-K of Pall  Corporation for the fiscal year ended August 3, 1996, have
been so  incorporated  in  reliance  on the  report  of KPMG Peat  Marwick  LLP,
independent  accountants,  given on the  authority  of said firm as  experts  in
accounting and auditing.



                                       15

<PAGE>



                                                                       EXHIBIT A


     THIS DOCUMENT  CONSTITUTES  PART OF A PROSPECTUS  COVERING  SECURITIES THAT
HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933.

                                  STOCK OPTION
                  To Purchase Common Stock of Pall Corporation
            Granted in Exchange for Gelman Sciences Inc. Stock Option
            ---------------------------------------------------------


Granted to:

Date of Grant: February 3, 1997

Number of Shares:

Purchase Price Per Share:

Expiration Date:

Granted in Exchange for Gelman Sciences Inc. Option dated:


     ss.1.  Subject to the terms and conditions  hereof,  Pall  Corporation (the
"Company")  hereby grants you an  irrevocable  option (the "Option") to purchase
the number of shares of common stock of the Company  ("Common  Stock") set forth
above at the price per share set forth above.  This option is [not]  intended to
be an incentive  stock option  within the meaning of Section 422 of the Internal
Revenue Code of 1986, as amended (the "Code").

     ss.2. On the Date of Grant the Option is  exercisable  for _____ shares and
will  become  exercisable  for the  balance  of the  shares  covered  hereby  in
installments as follows:

                                                         Number of shares
             Vesting dates                               becoming vested
             -------------                               ---------------

                                       OR

     ss.2. This Option is immediately exercisable.



                                       A-1

<PAGE>



     ss.3.  The Option may not be exercised  by you unless all of the  following
conditions are met:

          (a) Counsel for the Company  must be satisfied at the time of exercise
     that the issuance of shares upon exercise  will be in  compliance  with the
     Securities Act of 1933, as amended, and applicable state laws.

          (b) You must give the Company  written  notice of exercise  specifying
     the number of shares  with  respect to which the Option is being  exercised
     and at the time of  exercise  pay the full  purchase  price for the  shares
     being acquired  either (i) in cash (the word "cash" being deemed to include
     a check) or (ii) with the consent of the Committee (as defined  below),  in
     Common Stock,  or partly in cash and partly in Common Stock,  in accordance
     with ss.6  hereof.  The minimum  number of shares with respect to which the
     Option may be exercised in part at one time shall be 25.

          (c) You must at all times during the period beginning with the Date of
     Grant of the  Option  and  ending  on the date of such  exercise  have been
     either  an  employee  [or a  director]  of  the  Company  or of  one of its
     subsidiary corporations (or of a corporation or a parent or subsidiary of a
     corporation   assuming  this  option  by  reason  of  a  corporate  merger,
     consolidation, acquisition of property or stock, separation, reorganization
     or  liquidation  in a  transaction  to  which  Section  424(a)  of the Code
     applies);  provided,  however:  (i) if your  employment  [or  directorship]
     terminates  for any reason other than your death,  you have the right for a
     period of 90 days following such termination, but in no event subsequent to
     the expiration date of the Option,  to exercise that portion of the Option,
     if any,  which is  exercisable  by you on the date of  termination  of your
     employment [or directorship], and (ii) if your employment [or directorship]
     terminates by reason of your death, the provisions of ss.4 shall govern.

          (d) You (or your estate or any person  exercising this option pursuant
     to ss.4  hereof)  must make payment to the Company by cash or check of such
     amount as is  sufficient to satisfy the  Company's  obligation,  if any, to
     withhold federal,  state and local taxes by reason of such exercise or make
     such other  arrangement  satisfactory  to the  Committee as will enable the
     Company to satisfy any such obligation.

          (e) The  shares  covered  hereby  have been  listed  (subject  only to
     official notice of issuance) on any national  securities  exchange on which
     the Common Stock is then listed.

     ss.4. The Option is not  transferable  by you otherwise than by will or the
laws of descent and distribution and is exercisable during your lifetime only by
you. If at the time of your death the Option has not been fully exercised,  your
estate or any person who acquires  the right to exercise  this option by bequest
or inheritance or by reason of your death may, at any time within 180 days after
the date of your death (but in no event  after the  expiration  date),  exercise
this  option  with  respect  to the  number of shares as to which you could have
exercised this option at



                                       A-2

<PAGE>



the time of your death.  It shall be a condition  to the exercise of this option
after  your  death  that  the  Company  shall  have  been   furnished   evidence
satisfactory  to it of the right of the person  exercising  this option to do so
and that all estate,  transfer,  inheritance or death taxes payable with respect
to the  Option or the  shares to which it  relates  have been paid or  otherwise
provided for to the satisfaction of the Company.

     ss.5. If the Company effects any stock split, stock dividend,  combination,
exchange of shares or similar capital  adjustments,  occurring after the Date of
Grant of this option and prior to its  exercise in full,  the number and kind of
shares for which this option may  thereafter  be exercised  and the option price
per share shall be proportionately  and appropriately  adjusted so as to reflect
such change, all as determined by the Committee. In the event of any transaction
to which ss.424(a) of the Code applies (i.e., a corporate merger, consolidation,
acquisition  of property or stock,  separation,  reorganization  or  liquidation
involving the Company or a parent or  subsidiary  of the  Company),  the Company
shall have the right to substitute or cause to be  substituted  for the Option a
new option, or to cause the Option to be assumed,  provided such substitution or
assumption meets the requirements of said ss.424(a).

     ss.6.  With the consent of the Committee  (as defined in ss.7 hereof),  you
may make payment at the time of exercise by delivering to the Company  shares of
Common Stock of the Company having a total fair market value equal to the option
exercise  price,  or a  combination  of cash and such shares having a total fair
market value equal to the option exercise  price,  provided,  however,  that all
shares so delivered  must have been  beneficially  owned by you for at least six
months prior to the option exercise date and, upon request, the Company shall be
given satisfactory proof of such beneficial  ownership.  For the purposes of the
preceding  sentence,  the fair market  value of a share of Common Stock shall be
the mean between the high and low sale prices of the Common Stock on the trading
day  preceding  the option  exercise date as such prices are reported by and for
the New York Stock Exchange Composite  Transactions.  Certificates  representing
shares  delivered  to the  Company  pursuant  to this  paragraph  shall  be duly
endorsed or accompanied by the appropriate stock powers, in either case with the
signature guaranteed if so required by the Company.

     ss.7. The Option shall be administered by the Compensation Committee of the
Company as from time to time constituted (the "Committee").  The Committee shall
be authorized to interpret the Option and to make all other decisions  necessary
or advisable  for the  administration  thereof.  The  Committee  may correct any
defect or supply any omission or reconcile  any  inconsistency  in the Option in
the  manner and to the extent the  Committee  deems  desirable  to carry it into
effect.  Any decision of the Committee in the  administration  of the Option, as
described herein, shall be final and conclusive. The Committee may act only by a
majority of its members in office, except that the members thereof may authorize
any one or more of their  number or any  officer of the  Company to execute  and
deliver  documents on behalf of the Committee.  No member of the Committee shall
be liable for anything  done or omitted to be done by him or by any other member
of the  Committee  in  connection  with the  Option,  except for his own willful
misconduct or as expressly provided by statute.




                                       A-3

<PAGE>



     ss.8. Nothing in the Option shall confer any rights on any officer or other
employee  to  continue  in the employ of the  Company  or any of its  subsidiary
corporations  or shall interfere in any way with the right of the Company or any
of its  subsidiary  corporations,  as the case may be, to  terminate  his or her
employment at any time.

     ss.9. The words "employee", "subsidiary corporation" and any other words or
terms used in the Option  which are defined or used in Section 422 or 424 of the
Code shall,  unless the context clearly  requires  otherwise,  have the meanings
assigned  to them  therein,  even  though the Option is not an  incentive  stock
option.


                                            PALL CORPORATION



                                            By_________________
                                                  Secretary




                                       A-4

<PAGE>



                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS


Item 14. Other Expenses of Issuance and Distribution.

     The expenses of the issuance and  distribution of the securities  which are
the subject of the prospectus in this Post-Effective  Amendment are estimated as
follows:


Registration fee..................................................   $ 2,665*
Legal fees and expenses...........................................    15,000
Accountants' fees and expenses....................................     3,500
Miscellaneous.....................................................       335
                                                                      ------
         Total....................................................   $21,500
                                                                      ======
- ----------

*    Consists only of that portion of the  registration  fee attributable to the
     360,187 shares of the  Registrant's  Common Stock covered by the prospectus
     in this Post-Effective Amendment.


Item 15. Indemnification of Directors and Officers.

     Section 7.02 of the Registrant's Bylaws provides as follows:

          "Indemnification.  The Corporation  shall indemnify any person made or
     threatened to be made a party to any action or proceeding, whether civil or
     criminal  (and whether or not by or in the right of the  corporation  or of
     any other  corporation  of any type or kind,  domestic or  foreign,  or any
     partnership,   joint  venture,   trust,  employee  benefit  plan  or  other
     enterprise),  by  reason  of the fact that such  person,  his  testator  or
     intestate, is or was a director or officer of the corporation or served any
     other  corporation  of any  type  or  kind,  domestic  or  foreign,  or any
     partnership,   joint  venture,   trust,  employee  benefit  plan  or  other
     enterprise  in any  capacity  at the  request of the  corporation,  against
     judgments,  fines,  amounts paid in  settlement  and  reasonable  expenses,
     including attorneys' fees, actually and necessarily incurred as a result of
     such action or  proceeding,  or any appeal  therein,  provided  that (i) no
     indemnification  may be made to or on behalf of any person if a judgment or
     other final  adjudication  adverse to such person establishes that his acts
     were  committed  in bad faith or were the result of active  and  deliberate
     dishonesty and were material to the cause of action so adjudicated, or that
     he personally gained in fact a financial profit or other advantage to



                                      II-1

<PAGE>



     which  he was not  legally  entitled;  (ii)  no  indemnification  shall  be
     required in  connection  with the  settlement  of any pending or threatened
     action or  proceeding,  or any  other  disposition  thereof  except a final
     adjudication,  unless the  corporation  has consented to such settlement or
     other  disposition,  and (iii) the  corporation  shall not be  obligated to
     indemnify  any person by reason of the adoption of this Section 7.02 if and
     to the extent such person is entitled to be  indemnified  under a policy of
     insurance as such policy would apply in the absence of the adoption of this
     Section 7.02.

          "Reasonable expenses, including attorneys' fees, incurred in defending
     any action or proceeding,  whether threatened or pending,  shall be paid or
     reimbursed by the corporation in advance of the final  disposition  thereof
     upon  receipt  of an  undertaking  by or on  behalf of the  person  seeking
     indemnification  to repay such amount to the corporation to the extent,  if
     any, such person is ultimately found not to be entitled to indemnification.

          "Notwithstanding any other provision hereof, no amendment or repeal of
     this  Section  7.02,  or any  other  corporate  action or  agreement  which
     prohibits or otherwise limits the right of any person to indemnification or
     advancement or reimbursement of expenses  hereunder,  shall be effective as
     to any person  until the 60th day  following  notice to such person of such
     action,  and no such  amendment  or  repeal  or other  corporate  action or
     agreement  shall deprive any person of any right  hereunder  arising out of
     any alleged or actual act or omission occurring prior to such 60th day.

          "The corporation is hereby authorized,  but shall not be required,  to
     enter into  agreements  with any of its  directors,  officers or  employees
     providing for rights to  indemnification  and advancement and reimbursement
     of reasonable expenses,  including attorneys' fees, to the extent permitted
     by law,  but the  corporation's  failure  to do so shall not in any  manner
     affect or limit the rights provided for by this Section 7.02 or otherwise.

          "For purposes of this Section 7.02, the term 'the  corporation'  shall
     include any legal successor to the  corporation,  including any corporation
     which acquires all or substantially all of the assets of the corporation in
     one  or  more  transactions.   For  purposes  of  this  Section  7.02,  the
     corporation shall be deemed to have requested a person to serve an employee
     benefit  plan  where the  performance  by such  person of his duties to the
     corporation or any subsidiary  thereof also imposes duties on, or otherwise
     involves   services  by,  such  person  to  the  plan  or  participants  or
     beneficiaries  of the plan,  and excise  taxes  assessed  on a person  with
     respect to an employee  benefit plan  pursuant to  applicable  law shall be
     considered fines.

          "The  rights  granted   pursuant  to  or  provided  by  the  foregoing
     provisions  of this  Section  7.02 shall be in addition to and shall not be
     exclusive of any other rights to indemnification  and expenses to which any
     such person may otherwise be entitled by law, contract or otherwise."




                                      II-2

<PAGE>



     Section  721 of the  New  York  Business  Corporation  Law  (the  "B.C.L.")
provides that no indemnification  may be made to or on behalf of any director or
officer of the Registrant if "a judgment or other final adjudication  adverse to
the director or officer establishes that his acts were committed in bad faith or
were the result of active and  deliberate  dishonesty  and were  material to the
cause of action so adjudicated, or that he personally gained in fact a financial
profit or other advantage to which he was not legally entitled." Section 7.02 of
the Registrant's By-Laws includes the foregoing statutory language.

     The rights  granted  under  Section 7.02 of the By-Laws are in addition to,
and are not  exclusive of, any other rights to  indemnification  and expenses to
which any director or officer may otherwise be entitled. Under the B.C.L., a New
York corporation may indemnify any director or officer who is made or threatened
to be made a party to an action by or in the right of such  corporation  against
"amounts paid in settlement and reasonable expenses, including attorneys' fees,"
actually  and  necessarily  incurred  by him in  connection  with the defense or
settlement of such action,  or in  connection  with an appeal  therein,  if such
director or officer  acted,  in good faith,  for a purpose  which he  reasonably
believed  to be in  the  best  interests  of the  corporation,  except  that  no
indemnification  shall  be made in  respect  of (1) a  threatened  action,  or a
pending  action  which is settled or  otherwise  disposed  of, or (2) any claim,
issue or matter as to which such  director or officer  shall have been  adjudged
liable to the corporation, unless and only to the extent that a court determines
that the  director or officer is fairly and  reasonably  entitled  to  indemnity
(B.C.L. Section 722(c)). A corporation may also indemnify directors and officers
who  are  parties  to  other  actions  or  proceedings   (including  actions  or
proceedings  by or in the right of any  other  corporation  or other  enterprise
which the director or officer served at the request of the corporation)  against
"judgments, fines, amounts paid in settlement and reasonable expenses, including
attorneys'  fees," actually or necessarily  incurred as a result of such actions
or proceedings,  or any appeal therein,  provided the director or officer acted,
in good  faith,  for a purpose  which he  reasonably  believed to be in the best
interests of the corporation  (or in the case of service to another  corporation
or other enterprise at the request of such corporation,  not opposed to the best
interests  of such  corporation)  and,  in criminal  cases,  that he also had no
reasonable  cause to believe  that his  conduct  was  unlawful  (B.C.L.  Section
722(a)). Any indemnification under Section 722 may be made only if authorized in
the specific case by disinterested  directors, or by the board of directors upon
the opinion in writing of  independent  legal  counsel that  indemnification  is
proper, or by the shareholders  (B.C.L.  Section 723(b)),  but even without such
authorization,  a court  may  order  indemnification  in  certain  circumstances
(B.C.L.  Section 724). Further,  any director or officer who is "successful,  on
the merits or  otherwise," in the defense of an action or proceeding is entitled
to indemnification as a matter of right (B.C.L. Section 723(a)).

     A New York corporation may generally  purchase  insurance,  consistent with
the  limitations  of New  York  insurance  law and  regulatory  supervision,  to
indemnify the corporation for any obligation  which it incurs as a result of the
indemnification of directors and officers under the provisions of the B.C.L., so
long as no final  adjudication  has established that the directors' or officers'
acts of active and deliberate dishonesty were material to the cause of action so
adjudicated



                                      II-3

<PAGE>



or that the directors or officers  personally  gained in fact a financial profit
or other advantage (B.C.L. Section 726).

     The  Registrant  has policies  insuring its officers and directors  against
certain civil  liabilities,  including  liabilities  under the Securities Act of
1933 (the "Securities Act").

Item 16. Exhibits

     The index to exhibits appears immediately  following the signature pages of
this Amendment.

Item 17. Undertakings.

     The undersigned Registrant hereby undertakes as follows:

     (1) To file,  during any period in which  offers or sales are being made, a
post-effective amendment to this Registration Statement:

     (i)  To  include  any  prospectus  required  by  Section  10(a)(3)  of  the
          Securities Act;

     (ii) To reflect in the  prospectus  any facts or events  arising  after the
          effective  date of this  Registration  Statement  (or the most  recent
          post-effective  amendment  thereof)  which,  individually  or  in  the
          aggregate, represent a fundamental change in the information set forth
          in this Registration  Statement  (Notwithstanding  the foregoing,  any
          increase  or decrease  in volume of  securities  offered (if the total
          dollar  value of  securities  offered  would not exceed that which was
          registered) may be reflected in the form of prospectus  filed with the
          Commission pursuant to Rule 424(b) if, in the aggregate, the change in
          volume  represents no more than a 20% change in the maximum  aggregate
          offering  price set forth in the  "Calculation  of  Registration  Fee"
          table in the effective registration statement.); and

     (iii)To include  any  material  information  with  respect  to the plan of
          distribution not previously disclosed in the Registration Statement or
          any  material  change  to  such   information  in  this   Registration
          Statement; and

provided,  however,  that  paragraphs  (i) and (ii)  above  do not  apply if the
information  required  to be  included in a  post-effective  amendment  by those
paragraphs  is contained in periodic  reports  filed by the Company  pursuant to
Section  13 or  Section  15(d)  of the  Securities  Exchange  Act of  1934  (the
"Exchange  Act")  that  are  incorporated  by  reference  in  this  Registration
Statement.




                                      II-4

<PAGE>



     (2) For the purpose of determining  any liability under the Securities Act,
each such  post-effective  amendment  shall be  deemed to be a new  registration
statement relating to the securities  offered therein,  and the offering of such
securities  at that time shall be deemed to be the  initial  bona fide  offering
thereof.

     (3) To remove from registration by means of a post-effective  amendment any
of the securities being registered which remain unsold at the termination of the
offering.

     (4) For purposes of determining  any liability  under the  Securities  Act,
each filing of the Company's  annual report pursuant to Section 13(a) or Section
15(d) of the Exchange Act that is incorporated by reference in this Registration
Statement  shall be deemed to be a new  registration  statement  relating to the
securities  offered  herein,  and the offering of such  securities  at that time
shall be deemed to be the initial bona fide offering thereof.

     (5) Insofar as indemnification for liabilities arising under the Securities
Act may be  permitted to  directors,  officers  and  controlling  persons of the
Registrant pursuant to the provisions referred to in Item 15, or otherwise,  the
Registrant  has been advised that in the opinion of the  Securities and Exchange
Commission  such  indemnification  is against  public policy as expressed in the
Securities  Act and is  therefore  unenforceable.  In the event that a claim for
indemnification  against  such  liabilities  (other  than  the  payment  by  the
Registrant of expenses  incurred or paid by a director,  officer or  controlling
person of the  Registrant  in the  successful  defense  of any  action,  suit or
proceeding)  is  asserted by such  director,  officer or  controlling  person in
connection with the securities being registered,  the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit  to a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against  public policy as expressed in the  Securities
Act and will be governed by the final adjudication of such issue.





                                      II-5

<PAGE>



                                   SIGNATURES


     Pursuant to the  requirements of the Securities Act of 1933, the Registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for filing on Form S-3 and has duly  caused this  Amendment  to be
signed on its  behalf by the  undersigned,  thereunto  duly  authorized,  in the
Village of East Hills, State of New York, on the 2nd day of July, 1997.


                                            PALL CORPORATION



                                             By: /s/ Jeremy Hayward-Surry
                                                 ------------------------
                                                Jeremy Hayward-Surry
                                                President, Treasurer and
                                                      Chief Financial Officer


                                     ------


     Pursuant to the  requirements of the Securities Act of 1933, this Amendment
has been  signed on July 2, 1997,  by the  following  persons in the  capacities
indicated.


    Signature                         Title
    ---------                         -----



/s/ Eric Krasnoff
- ----------------                      Chairman and Chief Executive Officer
    Eric Krasnoff                     (Principal Executive Officer) and Director



/s/ Jeremy Hayward-Surry
- ------------------------              President, Treasurer and Chief Financial
    Jeremy Hayward-Surry              Officer (Principal Financial Officer)
                                      and Director




                                      II-6

<PAGE>



    Signature                         Title
    ---------                         -----


/s/ Viraj Patel
- ---------------                       Chief Corporate Accountant
    Viraj Patel                       (Principal Accounting Officer)



    *     
- ------------------                    Director
    Abraham Appel



    *
- ----------------------                Director
     Ulric Haynes, Jr.



     *
- -------------------------             Director
     Edwin W. Martin, Jr.


     *
- -------------------                   Director
      David B. Pall




*By: /s/ Jeremy Hayward-Surry
     ------------------------
        Jeremy Hayward-Surry
         Attorney-in-Fact




                                      II-7

<PAGE>



    Signature                         Title
    ---------                         -----


     *
- -------------------------             Director
     Katharine L. Plourde


     *
- ----------------------------          Director
     Chesterfield F. Seibert


     *
- --------------------                  Director
     Heywood Shelley


     *
- -------------------                   Director
     Alan B. Slifka


     
- --------------------                  Director
     James D. Watson


     *
- ------------------------              Director
     Derek T.D. Williams



*By: /s/ Jeremy Hayward-Surry
     ------------------------
        Jeremy Hayward-Surry
         Attorney-in-Fact




                                      II-8

<PAGE>




                                  EXHIBIT INDEX



Exhibit No.
- -----------

     *4(a)     Rights  Agreement  dated as of  November  17,  1989,  between the
               Registrant and United States Trust Company of New York, as Rights
               Agent,  filed  as  Exhibit  I to  the  Registrant's  Registration
               Statement on Form 8-A (File No. 1-4311) dated September 10, 1992,
               for the registration of the Common Share Purchase Rights pursuant
               to  Section  12(b) of the  Securities  Exchange  Act of 1934 

      4(b)     Warrant Agreement dated June 6, 1995 between Gelman Sciences Inc.
               and David H. Fink, and letter dated  February 18, 1997,  from the
               Registrant to David H. Fink

    **5        Opinion of Carter, Ledyard & Milburn re legality of securities

      8        Opinion of Carter, Ledyard & Milburn re tax matters 

     23(a)     Consent of Carter, Ledyard & Milburn (included  in Exhibit 8) 

     23(b)     Consent of KPMG Peat  Marwick LLP

   **24        Powers of Attorney

- ---------------
 
*    Incorporated herein by reference.

**   Previously filed as an exhibit to this Registration Statement.



                                      II-9





                               E X H I B I T 4(b)
                               -------------



<PAGE>



                                 GELMAN SCIENCES


                                WARRANT AGREEMENT
                                -----------------



     Gelman  Sciences  Inc.  ("Corporation")  hereby  grants  to David  H.  Fink
("Grantee") the right to purchase  20,000 stock warrants  ("Warrants") of Common
Stock,  $0.10 par value of the  Corporation  (the "Shares") at $2.83 per warrant
upon the terms and conditions contained in this Agreement.

1.   Each Warrant can be  converted  into one share of Common Stock upon payment
     of the exercise price of $22.65.

2.   The Warrants will vest in accordance with the following schedule:

                 January 1, 1996            7,000
                 January 1, 1997            7,000
                 January 1, 1998            6,000

3.   The Warrants  will expire (to the extent not  previously  exercised) on the
     earlier of the fifth  anniversary of the date of this Agreement or the date
     determined in accordance with Paragraph 5.

4.   The Warrants (to the extent then  exercisable)  may be assigned by Grantee,
     in whole or in part,  at any time  prior to the  Expiration  Date  (defined
     above),  only to Daniel S. Cooper,  Mark J. Zausmer,  Trudy E. Fink, any of
     Grantee's minor  children,  and Mr. and Mrs. Samuel R. Fink, or any of them
     (each, a "Permitted Assignee").  Each assignment to a Permitted Assignee is
     conditioned on that Permitted  Assignee agreeing in writing to abide by the
     terms of this  Agreement as if he or she were a party hereto.  If assigned,
     the Warrants (to the extent then exercisable)  shall be exercisable,  prior
     to the Expiration  Date, only by a Permitted  Assignee or any person taking
     from  a  Permitted  Assignee  by  will  or  by  the  laws  of  descent  and
     distribution.

5.   The Warrants,  to the extent they are  exercisable on the date of Grantee's
     death, may be exercised for a period of 180 days following Grantee's death,
     but in no event  subsequent to the  expiration  date of the Warrants,  by a
     Permitted  Assignee or Grantee's legal  representative  or by the person or
     persons  to whom  Grantee's  rights  shall  pass by will or by the  laws of
     descent and distribution.  Grantee's legal  representative or the person or
     persons  to whom  Grantee's  right  shall  pass  by will or by the  laws of
     descent  and  distribution  may not assign the  Warrants  without the prior
     written consent of the Corporation.




                                    

<PAGE>



6.   The Warrants shall be exercised by giving a written notice to the Secretary
     of the  Corporation.  Such notice shall  specify the number of Shares to be
     purchased,  the name in which  Grantee  desires to have the shares  issued,
     Grantee's  address  and  Grantee's  social  security  number  and  shall be
     accompanied by payment in full in cash of the aggregate  exercise price for
     the  number of  Shares  purchased  and by the  representation  required  by
     Paragraph 10 of this  Agreement if the Shares to be issued upon exercise of
     the Warrants have not been registered  under the Securities Act of 1933, as
     amended (the "Securities  Act"). Such exercise shall be effective only upon
     the actual  receipt of such written notice and no rights or privileges of a
     shareholder  of the  Corporation  in respect of any of the Shares  issuable
     upon  exercise  of any part of the  Warrants  shall inure to Grantee or any
     other  person who is  entitled to exercise  the  Warrants  unless and until
     certificates representing such Shares shall have been issued.

7.   Nothing  contained  in  this  Agreement,   nor  any  action  taken  by  the
     Corporation,   shall   confer  upon  Grantee  any  right  with  respect  to
     continuation of Grantee's service as legal counsel for the Corporation.

8.   If, upon or as a result of Grantee's exercise of the Warrants,  there shall
     be payable  by the  Corporation  any  amount  for  income tax  withholding,
     Grantee  will  pay  such  amount  to  the   Corporation  to  reimburse  the
     Corporation for such income tax withholding.

9.   In purchasing the Warrants granted hereby, Grantee represents as follows:

     a)   Grantee has carefully  reviewed and understand this Agreement and have
          been given an opportunity to make further inquires of any personnel of
          the Corporation  concerning the continuing and proposed  operations of
          the Corporation; and

     b)   Grantee has such  knowledge and  experience in financial  matters that
          Grantee  is  capable  of  evaluating  the  merits  and  risks  of  any
          investment in the Warrants and the Shares, and Grantee is able to bear
          the economic risk of any investment in the  Corporation,  even if such
          investment should ultimately be determined to be worthless.

10.  Grantee is  purchasing  the Warrants  solely for  Grantee's own account for
     investment  and not as a  nominee  or agent  for the  benefit  of any other
     person.  Grantee has no present intention to distribute or otherwise resell
     the Warrants or the Shares  obtained upon exercise of the Warrants,  except
     as  permitted  by this  Agreement.  Grantee  understands  that  neither the
     Warrants nor the Shares have been  registered  under the  Securities Act of
     1933 (the "Act") or under the laws of any state or other  jurisdiction  and
     that the Company is under no  obligation  to register  the Shares.  Without
     registration,  the Shares may be sold  within the United  States  only in a
     private  offering  or pursuant to Rule 144  (including  applicable  holding
     periods)  or  another  applicable  exemption  from  registration.   Grantee
     understands that, if then applicable,  any certificate evidencing Grantee's
     ownership of Shares will be stamped with



                                        2

<PAGE>



     (i) a legend stating that the Shares have not been registered under the Act
     or under the securities laws of any state and setting forth or referring to
     the  restrictions  on  transferability  and sale of the Shares and (ii) any
     legend required under the securities laws of any applicable state.  Grantee
     further understands that stop-order  instructions  prohibiting  transfer of
     the Shares may be issued by the Company as a means of  preventing  the sale
     or transfer of the Shares not in accordance with applicable law.

11.  In the event that the outstanding shares of Common Stock of the Corporation
     shall be increased by a stock  dividend or changed into or exchanged  for a
     different  number  or kind of shares  of stock or other  securities  of the
     Corporation  or of  another  corporation,  whether  by  reason  of  merger,
     consolidation, recapitalization, reclassification, split-up, combination of
     shares or otherwise,  the number,  price and kind of Shares  subject to the
     Warrants shall be appropriately adjusted.

12.  The Shares  issued upon exercise of the Warrants may consist in whole or in
     part of shares of the authorized and unissued or reacquired Common Stock of
     the Corporation.

13.  The Company shall register the Shares under the Securities Act of 1933.


                                            Sincerely yours,



                                            By:/s/Charles Gelman
                                               -----------------
                                               Charles Gelman
                                               Chairman of the Board and
                                               Chief Executive Officer

The above is agreed to and accepted:


/s/David H. Fink
- ----------------
David H. Fink
Date: June 6, 1995




                                                         3

<PAGE>




                              Pall Corporation

                              25 Harbor Park Drive-Port Washington, NY 11050-USA
                              Phone 516-484-3600 - FAX 516-484-3651


February 18, 1997


Gelman Sciences
600 South Wagner Road
Ann Arbor, MI 48103

Attention: David H. Fink

Dear Mr. Fink:

We refer to the Warrant  dated June 6, 1995  granted to you by Gelman  Sciences,
Inc. ("Gelman") covering  20,000 shares of Gelman Stock at an exercise  price of
$22.65 per share.  Please be advised  that,  as a result of the merger of Gelman
with a subsidiary of Pall  Corporation  ("Pall") at an exchange  ratio of 1.3047
shares of Pall Common Stock for each share of Gelman Common Stock,  your Warrant
is now exercisable (when fully vested) for 26,094 shares of Pall Common Stock at
an exercise price of $17.3603 per share.

Your  Warrant  is now  vested  as to  18,266  Pall  shares,  will vest as to the
remaining 7,828 Pall shares on January 1, 1998 and will expire on June 6, 2000.

If you have any  questions as to the exercise  procedure,  you may contact me at
516-484-3600, X6238.

Sincerely,



Viraj J. Patel
Group Controller

VJP:lm



                                                         





                                 E X H I B I T 8
                                 -------------


                                              

<PAGE>






                            CARTER, LEDYARD & MILBURN
                               Counsellors at Law
                                  2 Wall Street
                            New York, New York 10005
                                   ----------
                                 (212) 732-3200
                               Fax (212) 732-3232


                                                                    July 2, 1997

Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, D.C.  20549

                  Re:      Pall Corporation
                           Post-Effective Amendment No. 1 on Form S-3
                              to Registration Statement on Form S-4
                           Registration No. 333-17417
                           -------------------------------------------

Ladies and Gentlemen:

     We have acted as counsel for Pall Corporation,  a New York corporation (the
"Company"), in connection with the preparation and filing of this Post-Effective
Amendment  No.  1  on  Form  S-3  (the   "Amendment")  to  the   abovereferenced
Registration  Statement on Form S-4 under the Securities Act of 1933, as amended
(the "Securities Act"). The prospectus constituting Part I of the Amendment (the
"Prospectus")  relates to the issuance of up to 360,187 shares (the "Shares") of
the  Company's  common  stock,  par value $.10 per share,  upon the  exercise of
certain options (the "Options") and warrants (the "Warrants").

     We have examined originals or copies,  certified or otherwise identified to
our satisfaction,  of all such agreements,  certificates and other statements of
corporate officers and other  representatives of the Company and other documents
as we have deemed necessary as a basis for this opinion.  In such examination we
have assumed the  genuineness  of all  signatures  and the  authenticity  of all
documents  submitted to us as originals and the conformity with the originals of
all documents  submitted to us as copies.  We have, when relevant facts material
to our opinion were not independently established by us, relied to the extent we
deemed such  reliance  proper upon  written or oral  statements  of officers and
other representatives of the Company.




                                                         

<PAGE>


Securities and Exchange Commission                                           -2-


     Based on and  subject  to the  foregoing,  we are of the  opinion  that the
section entitled "Federal Income Tax Consequences" in the Prospectus contains an
accurate general  description,  under currently applicable law, of the principal
United States federal income tax considerations  relating to the Options and the
Warrants.

     We consent to the filing of this opinion as an exhibit to the Amendment and
to  the  references  to  our  firm  under  the  captions   "Federal  Income  Tax
Consequences" and "Legal Matters" in the Prospectus.  In giving this consent, we
do not acknowledge  that we come within the category of persons whose consent is
required by the Securities Act or the rules and regulations thereunder.

                                            Very truly yours,

                                            /s/Carter, Ledyard & Milburn

                                               Carter, Ledyard & Milburn
                                        


HB:lrh



                                        






                               E X H I B I T 23(b)
                               ------------- 


                                                         3

<PAGE>


                                                                   EXHIBIT 23(b)


                         CONSENT OF INDEPENDENT AUDITORS



Board of Directors
Pall Corporation:


We consent to the incorporation by reference,  in this Post-Effective  Amendment
on  Form  S-3 to the  Registration  Statement  on Form  S-4 of Pall  Corporation
(Registration No. 333-17417),  of our reports dated September 3, 1996,  relating
to the  consolidated  balance sheets of Pall Corporation and its subsidiaries as
of August 3, 1996, and July 29, 1995, and the related consolidated statements of
earnings,  stockholders'  equity  and cash flows for the years  ended  August 3,
1996, July 29, 1995, and July 30, 1994, and related schedule,  which reports are
incorporated  by reference  or appear in the Annual  Report on Form 10-K of Pall
Corporation for the fiscal year ended August 3, 1996.

Such  reports  refer to the  adoption  by the  Company of  Financial  Accounting
Standards Board's Statement No. 112,  "Employers'  Accounting for Postemployment
Benefits" in fiscal 1995.

We also consent to the reference to our firm under the heading  "Experts" in the
prospectus included in this Post-Effective Amendment.



                                            /s/KPMG PEAT MARWICK LLP

                                            KPMG PEAT MARWICK LLP


Jericho, New York
July 2, 1997




                                                         



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