PALL CORP
424B3, 1997-07-17
GENERAL INDUSTRIAL MACHINERY & EQUIPMENT, NEC
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                                                      Registration No. 333-17417
                                                       Rule 424(b)(3) Prospectus


PROSPECTUS

                                PALL CORPORATION

                         419,055 SHARES OF COMMON STOCK

     Pall Corporation, a New York corporation ("Pall" or the "Company"),  hereby
offers to sell up to 419,055  shares  (the  "Shares"  or "Pall  Shares")  of its
Common Stock, par value $.10 per share (the "Common Stock"), as follows:  (i) up
to 392,961 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 July 16, 1997, the last reported sale price of a
share of Common Stock for New York Stock  Exchange  composite  transactions  was
$23-7/8, and 127,325,430 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 July 17, 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
                                                       ----              ---
Calendar quarters
- -----------------
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 16).....................  24 13/16          22 5/8

     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 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 $0.14 in the second,  third and
fourth  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, 111 Pall Options to purchase



                                        5

<PAGE>



an aggregate of 392,961 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
127,325,430  shares were issued and  outstanding on July 16, 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



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