IONICS INC
8-K, 1997-08-27
SPECIAL INDUSTRY MACHINERY, NEC
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                 SECURITIES AND EXCHANGE COMMISSION
                        Washington, DC 20549


                              FORM 8-K

                           CURRENT REPORT

               Pursuant to Section 13 or 15(d) of the 
                   Securities Exchange Act of 1934


Date of Report (Date of earliest event reported)  August 19, 1997 



                        IONICS, INCORPORATED                 
       (Exact name of registrant as specified in its charter)



      Massachusetts                1-7211              04-2068530     
(State or other jurisdiction    (Commission)         (IRS Employer
    of incorporation)           File Number)      Identification No.)




  65 Grove Street, Watertown, MA                       02172         
(Address of principal executive offices)            (ZIP Code)




Registrant's telephone number, including area code   (617) 926-2500 












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ITEM 5.  Other Events

        On August 19, 1997, the Board of Directors of Ionics, Incorporated
(the "Company") approved the renewal of the Company's existing stockholder
rights agreement by adopting a Renewed Rights Agreement between the Company
and BankBoston, N.A., as rights agent (the "Renewed Rights Agreement").
Pursuant to the Renewed Rights Agreement, one new right (a "Right") will be
issued for each share of common stock, par value $1.00 per share, of the
Company (the "Common Stock") (i) outstanding upon the "Expiration Date" as
such term is defined in the Company's existing rights agreement dated as of
December 22, 1987 between the Company and The First National Bank of Boston
(currently known as BankBoston, N.A.) (the "Record Date"); (ii) for each
share of Common Stock issued between the Record Date and the Distribution
Date (as defined in the Renewed Rights Agreement); and (iii) under certain
circumstances thereafter.  Each new Right will initially represent the
right to purchase from the Company one share of Common Stock, upon the
terms and subject to the conditions set forth in the Renewed Rights
Agreement.  The new Rights are redeemable under certain circumstances at
$.01 per Right and will expire on August 19, 2007, subject to extension or
earlier redemption.

        The description and terms of the new Rights are set forth in the
Renewed Rights Agreement, a copy of which is filed herewith and is
incorporated herein by reference.


ITEM 7.  Financial Statements and Exhibits

Exhibits

  1.     Form of Renewed Rights Agreement, dated as of August 19, 1997,
         between the Company and BankBoston N.A.













                                    -2-

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                             SIGNATURES


     Pursuant to the requirements of the Securities Exchange Act of
1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned hereunto duly authorized.

                                       IONICS, INCORPORATED



Date: August 27, 1997                By:/s/Arthur L. Goldstein     
                                        Arthur L. Goldstein
                                        Chairman and 
                                        Chief Executive Officer


































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                            EXHIBIT INDEX


                                                              Sequentially
                                                                Numbered
Exhibit No.             Description                               Page    

    1.                  Form of Renewed Rights Agreement            5
                        dated as of August 19, 1997
                        between the Company and 
                        BankBoston N.A.





































/4                                  -4-





     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
                        IONICS, INCORPORATED
     
                                 and
     
                          BANKBOSTON, N.A.
     
                            Rights Agent
     
     
     
     
     
     
     
     
                      Renewed Rights Agreement
     
                     Dated as of August 19, 1997
     
     
     
     
     







/5     


         
                          Table of Contents
     
     
Section                                                      Page
  
1    Certain Definitions . . . . . . . . . . . . . . . . . . . 2

2    Appointment of Rights Agent . . . . . . . . . . . . . . . 8

3    Issuance of Rights Certificates . . . . . . . . . . . . . 8

4    Form of Rights Certificates . . . . . . . . . . . . . . .11

5    Countersignature and Registration . . . . . . . . . . . .12

6    Transfer, Split Up, Combination and Ex-
     change of Rights Certificates; Mutilated,
     Destroyed, Lost or Stolen Rights Certifi-
     cates . . . . . . . . . . . . . . . . . . . . . . . . . .13

7    Exercise of Rights; Purchase Price; Expira-
     tion Date of Rights . . . . . . . . . . . . . . . . . . .15

8    Cancellation and Destruction of Rights Cer-
     tificates . . . . . . . . . . . . . . . . . . . . . . . .18

9    Reservation and Availability of Capital
     Stock . . . . . . . . . . . . . . . . . . . . . . . . . .18

10   Record Date for Securities Issued Upon Ex-
     ercise. . . . . . . . . . . . . . . . . . . . . . . . .  21

11   Adjustment of Purchase Price, Number and
     Kind of Shares or Number of Rights. . . . . . . . . . . .21

12   Certificate of Adjusted Purchase Price or
     Number of Shares. . . . . . . . . . . . . . . . . . . . .33

13   Consolidation, Merger or Sale or Transfer
     of Assets or Earning Power. . . . . . . . . . . . . . . .34

14   Fractional Rights and Fractional Shares . . . . . . . . .39

15   Rights of Action. . . . . . . . . . . . . . . . . . . . .40

16   Agreement of Rights Holders . . . . . . . . . . . . . . .41

                                     i
/6



17   Rights Certificate Holder Not Deemed a
     Stockholder . . . . . . . . . . . . . . . . . . . . . . .42

18   Concerning the Rights Agent . . . . . . . . . . . . . . .42

19   Merger or Consolidation or Change of Name
     of Rights Agent . . . . . . . . . . . . . . . . . . . . .43

20   Duties of Rights Agent. . . . . . . . . . . . . . . . . .44

21   Change of Rights Agent. . . . . . . . . . . . . . . . . .47

22   Issuance of New Rights Certificates . . . . . . . . . . .48

23   Redemption and Termination. . . . . . . . . . . . . . . .49

24   Notice of Certain Events. . . . . . . . . . . . . . . . .50

25   Notices . . . . . . . . . . . . . . . . . . . . . . . . .51

26   Supplements and Amendments. . . . . . . . . . . . . . . .52

27   Successors. . . . . . . . . . . . . . . . . . . . . . . .53

28   Determinations and Actions by the Board,
     etc.. . . . . . . . . . . . . . . . . . . . . . . . . . .53

29   Benefits of this Agreement. . . . . . . . . . . . . . . .54

30   Severability. . . . . . . . . . . . . . . . . . . . . . .54

31   Governing Law . . . . . . . . . . . . . . . . . . . . . .55

32   Counterparts. . . . . . . . . . . . . . . . . . . . . . .55

33   Descriptive Headings. . . . . . . . . . . . . . . . . . .55


          Exhibit A  --     Form of Rights Certificate








                                    ii
/7



                      RENEWED RIGHTS AGREEMENT
     
     
               RENEWED RIGHTS AGREEMENT, dated as of August  
     19, 1997, between Ionics, Incorporated, a Massachusetts
     corporation (the "Company"), and BankBoston, N.A., a
     national banking association (the "Rights Agent").
     
                        W I T N E S S E T H
     
               WHEREAS, on December 22, 1987, the Board of
     Directors of the Company (the "Board") adopted a stock-
     holder rights plan (the "Existing Rights Plan") and exe-
     cuted a Rights Agreement, between the Company and the
     Rights Agent (the "1987 Agreement");
     
               WHEREAS, the Existing Rights Plan is scheduled
     to expire on December 31, 1997;
     
               WHEREAS, on August 19, 1997 the Board deter-
     mined it desirable and in the best interests of the
     Company and its stockholders for the Company to renew the
     Existing Rights Plan upon its expiration and to implement
     such renewal by executing this Agreement (as hereinafter
     defined) and declaring the dividend distribution referred
     to in the fourth WHEREAS clause herein;
     
               WHEREAS, on August 19, 1997, (the "Rights Divi-
     dend Declaration Date"), the Board authorized and de-
     clared a dividend distribution of one Right (as hereinaf-
     ter defined) for each share of Common Stock (as hereinaf-
     ter defined) of the Company outstanding upon the "Expi-
     ration Date" under the 1987 Agreement (the "Record Date")
     and authorized the issuance of one Right (as such number
     may hereafter be adjusted pursuant to the provisions of
     Section 11(i) hereof) for each share of Common Stock of
     the Company issued between the Record Date (whether
     originally issued or delivered from the Company's trea-
     sury) and the Distribution Date (as hereinafter defined)
     and under certain circumstances thereafter, each Right
     initially representing the right to purchase one share of
     Common Stock of the Company, upon the terms and subject
     to the conditions hereinafter set forth (the "Rights");
     
               NOW, THEREFORE, in consideration of the premis-
     es and the mutual agreements hereinafter set forth, the
     parties hereby agree as follows:
                                     
/8


     
               Section 1.  Certain Definitions.  For purposes
     of this Agreement, the following terms have the meanings
     indicated:
     
                       (a)  "Acquiring Person" shall mean any
     Person (as hereinafter defined) who or which, together
     with all Affiliates and Associates (as hereinafter de-
     fined) of such Person, shall be the Beneficial Owner (as
     hereinafter defined) of 15% or more of the shares of
     Common Stock of the Company then outstanding, but shall
     not include an Exempt Person (as hereinafter defined).
     
                       (b)  "Act" shall mean the Securities Act
     of 1933, as amended.  
     
                       (c)  "Adjustment Shares" shall have the
     meaning set forth in Section 11(a)(ii) hereof.
     
                       (d)  "Affiliate" and "Associate" shall
     have the respective meanings ascribed to such terms in
     Rule 12b-2 of the General Rules and Regulations under the
     Exchange Act (as hereinafter defined).
     
                       (e)  "Agreement" shall mean this Renewed
     Rights Agreement as originally executed or as it may from
     time to time be supplemented, amended, renewed, restated
     or extended pursuant to the applicable provisions hereof.
     
                       (f)  A Person shall be deemed the "Benefi-
     cial Owner" of, and shall be deemed to "beneficially
     own," any securities:
     
                           (i)  which such Person or any of
               such Person's Affiliates or Associates, direct-
               ly or indirectly, owns or has the right to ac-
               quire (whether such right is exercisable imme-
               diately or only after the passage of time)
               pursuant to any agreement, arrangement or un-
               derstanding (whether or not in writing) or upon
               the exercise of conversion rights, exchange
               rights, rights, warrants, options or otherwise;
               provided, however, that a Person shall not be
               deemed the "Beneficial Owner" of, or to "bene-
               ficially own," (A) securities tendered pursuant
               to a tender or exchange offer made by or on
               behalf of such Person or any of such Person's
               Affiliates or Associates until such tendered
                                     2
/9


               securities are accepted for purchase or ex-
               change, or (B) securities issuable upon exer-
               cise of Rights at any time prior to the occur-
               rence of a Triggering Event (as hereinafter
               defined), or (C) securities issuable upon exer-
               cise of Rights from and after the occurrence of
               a Triggering Event which Rights are Original
               Rights (as hereinafter defined) or securities
               issued pursuant to Section 11(i) or Section
               11(p) hereof in connection with an adjustment
               made with respect to any Original Rights;
     
                          (ii)  which such Person or any of
               such Person's Affiliates or Associates, direct-
               ly or indirectly, has the right to vote or
               dispose of or has "beneficial ownership" of (as
               determined pursuant to Rule 13d-3 of the Gener-
               al Rules and Regulations under the Exchange
               Act), including pursuant to any agreement,
               arrangement or understanding, whether or not in
               writing; provided, however, that a Person shall
               not be deemed the "Beneficial Owner" of, or to
               "beneficially own," any security under this
               subparagraph (ii) as a result of an agreement,
               arrangement or understanding (whether or not in
               writing) to vote such security if such agree-
               ment, arrangement or understanding:  (A) arises
               solely from a revocable proxy or consent given
               in response to a public proxy or consent solic-
               itation made pursuant to, and in accordance
               with, the applicable provisions of the General
               Rules and Regulations under the Exchange Act
               and (B) is not also then reportable by such
               Person on Schedule 13D under the Exchange Act
               (or any comparable or successor statement); or
     
                         (iii)  which are beneficially
               owned, directly or indirectly, by any other
               Person (or any Affiliate or Associate thereof)
               with which such Person (or any of such Person's
               Affiliates or Associates) has any agreement,
               arrangement or understanding (whether or not in
               writing) for the purpose of acquiring, holding,
               voting (except pursuant to a revocable proxy as
               described in clause (A) of the proviso to sub-
               paragraph (ii) of this paragraph (f)) or dis-
               posing of any voting securities of the Company;
                                     3
/10


     
     provided, however, that nothing in this paragraph (f)
     shall cause a Person engaged in business as an underwrit-
     er of securities to be the "Beneficial Owner" of, or to
     be deemed to "beneficially own," any securities acquired,
     or which that Person has the right to acquire, through
     such Person's participation in good faith in a firm
     commitment underwriting until the expiration of 40 days
     after the date of such acquisition.
     
                       (g)  "Board" shall have the meaning set
     forth in the first "WHEREAS" clause at the beginning of
     this Agreement.
     
                       (h)  "Business Day" shall mean any day
     other than a Saturday, Sunday or day on which banking
     institutions in the Commonwealth of Massachusetts are
     authorized or obligated by law or executive order to
     close.
     
                       (i)  "Close of Business" on any given date
     shall mean 5:00 P.M., Boston, Massachusetts time, on such
     date; provided, however, that if such date is not a Busi-
     ness Day, it shall mean 5:00 P.M., Boston, Massachusetts
     time, on the next succeeding Business Day.
     
                       (j)  "Common Stock" when used in reference
     to the Company shall mean the common stock, par value
     $1.00 per share, of the Company or any other shares of
     capital stock of the Company into which such stock shall
     be reclassified or changed.  "Common Stock" when used
     with reference to any Person other than the Company
     organized in corporate form shall mean (i) the capital
     stock or other equity interest in such Person with the
     greatest voting power, (ii) the equity securities or
     other equity interest having power to control or direct
     the management of such Person or (iii) if such Person is
     a Subsidiary (as hereinafter defined) of another Person,
     the capital stock, equity securities of or other equity
     interest in the Person or Persons which ultimately con-
     trol such first-mentioned Person and which has issued any
     such outstanding capital stock, equity securities or
     equity interest.  "Common Stock" when used with reference
     to any Person not organized in corporate form shall mean
     units of beneficial interest which (x) represent the
     right to participate generally in the profits and losses
     of such Person (including without limitation any flow-
     through tax benefits resulting from an ownership interest
                                     4
/11



     in such Person) and (y) are entitled to exercise the
     greatest voting power of such Person or, in the case of a
     limited partnership, have the power to remove the general
     partner or partners.
     
                       (k)  "Common Stock Equivalents" shall have
     the meaning set forth in Section 11(a)(iii) hereof.
     
                       (l)  "Company" shall have the meaning set
     forth in the first paragraph of this Agreement until a
     successor corporation or entity shall have become such or
     until a Principal Party (as hereinafter defined) shall
     assume, and thereafter be liable for, all obligations and
     duties of the Company hereunder pursuant to the applica-
     ble provisions of this Agreement, and thereafter, "Compa-
     ny" shall mean such successor or Principal Party, respec-
     tively.
     
                       (m)  "Current Market Price" shall have the
     meaning set forth in Section 11(d) hereof.
     
                       (n)  "Current Value" shall have the mean-
     ing set forth in Section 11(a)(iii) hereof.
     
                       (o)  "Distribution Date" shall have the
     meaning set forth in Section 3(a) hereof.
     
                       (p)  "Exchange Act" shall mean the Securi-
     ties Exchange Act of 1934, as amended.  
     
                       (q)  "Exempt Person" shall mean (i) the
     Company, (ii) any Subsidiary of the Company, (iii) any
     employee benefit plan or employee stock plan of the
     Company or of any Subsidiary of the Company, (iv) any
     Person or entity organized, appointed, established or
     holding Common Stock of the Company by, for or pursuant
     to the terms of any employee benefit plan or employee
     stock plan, (v) a Person who (A) is the Beneficial Owner
     of less than 20% of the Common Stock of the Company then
     outstanding and has reported such ownership on Schedule
     13G under the Exchange Act (as hereinafter defined) (or
     any successor or comparable report) or on Schedule 13D
     under the Exchange Act (or any successor or comparable
     report) which Schedule 13D does not state any intention
     to or reserve the right to control or influence the
     management or policies of the Company or engage in any of
     the actions specified in Item 4 of such Schedule 13D
                                     5

/12



     (other than the disposition of Common Stock of the Compa-
     ny), (B) within ten Business Days (as hereinafter de-
     fined) of being requested by the Company to advise the
     Company regarding its intentions, certifies to the Compa-
     ny that such Person acquired shares of Common Stock of
     the Company in excess of 14.99% inadvertently or without
     knowledge of the terms of the Rights, (C) the Company
     determines acquired in excess of 14.99% inadvertently or
     without knowledge of the terms of the Rights and (D)
     together with its Affiliates and Associates, thereafter
     does not acquire additional shares of Common Stock of the
     Company while the Beneficial Owner of 15% or more of the
     shares of the Common Stock of the Company then outstand-
     ing or (vi) a Person who, together with its Affiliates
     and Associates, becomes the Beneficial Owner of 15% or
     more of the shares of Common Stock of the Company then
     outstanding solely as a result of a reduction in the
     number of shares of Common Stock of the Company outstand-
     ing due to the repurchase of shares of Common Stock of
     the Company by the Company, unless and until such time as
     such Person shall purchase or otherwise become (as a
     result of actions taken by such Person or its Affiliates
     or Associates) the Beneficial Owner of additional shares
     of Common Stock of the Company constituting 1% or more of
     the then outstanding shares of Common Stock of the Compa-
     ny.
     
                       (r)  "Existing Rights Plan" shall have the
     meaning set forth in the first "WHEREAS" clause hereof.
     
                       (s)  "Expiration Date" shall have the
     meaning set forth in Section 7(a) hereof.
     
                       (t)  "Final Expiration Date" shall mean
     the Close of Business on August 19, 2007.
     
                       (u)  "Original Rights" shall mean Rights
     acquired by a Person or such Person's Affiliates or
     Associates prior to the Distribution Date or issued
     pursuant to Section 3(a) or Section 22 hereof.
     
                       (v)  "Outside Directors" shall mean the
     members of the Board who are not officers of the Company
     or any of its Subsidiaries and who are not Acquiring
     Persons or representatives, nominees, Affiliates or Asso-
     ciates of any Acquiring Person.
                                     6

/13



     
                       (aa)  "Person" shall mean any individual,
     firm, corporation, partnership, trust or other entity and
     includes without limitation an unincorporated group of
     persons who, by formal or informal agreement or arrange-
     ment (whether or not in writing), have embarked on a
     common purpose or act.
     
                       (bb)  "Principal Party" shall have the
     meaning set forth in Section 13(b) hereof.
     
                       (cc)  "Purchase Price" shall have the
     meaning set forth in Section 4(a) hereof.
     
                       (dd)  "Record Date" shall have the meaning
     set forth in the fourth "WHEREAS" clause at the beginning
     of this Agreement.
     
                       (ee)  "Redemption Price" shall have the
     meaning set forth in Section 23(a) hereof.
     
                       (ff)  "Rights" shall have the meaning set
     forth in the fourth "WHEREAS" clause at the beginning of
     this Agreement.
     
                       (gg)  "Rights Agent" shall mean the Person
     named as the "Rights Agent" in the first paragraph of
     this Agreement until a successor Rights Agent shall have
     become such pursuant to the applicable provisions hereof,
     and thereafter "Rights Agent" shall mean such successor
     Rights Agent.  If at any time there is more than one
     Person appointed by the Company as Rights Agent pursuant
     to the applicable provisions of this Agreement, "Rights
     Agent" shall mean and include each such Person.
     
                       (hh)  "Rights Certificate" shall have the
     meaning set forth in Section 3(a) hereof.
     
                       (ii)  "Rights Dividend Declaration Date"
     shall have the meaning set forth in the fourth "WHEREAS"
     clause at the beginning of this Agreement.
     
                       (jj)  "Section 11(a)(ii) Event" shall have
     the meaning set forth in Section 11(a)(ii) hereof.
     
                       (kk)  "Section 11(a)(ii) Trigger Date"
     shall have the meaning set forth in Section 11(a)(iii)
     hereof.

                                     7
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                       (ll)  "Section 13 Event" shall have the
     meaning set forth in Section 13(a) hereof.
     
                       (mm)  "Spread" shall have the meaning set
     forth in Section 11(a)(iii) hereof.
     
                       (nn)  "Stock Acquisition Date" shall mean
     the first date of public announcement by the Company that
     an Acquiring Person has become such.
     
                       (oo)  "Subsidiary" shall mean, with refer-
     ence to any Person, any corporation or other entity of
     which securities or other ownership interest having
     ordinary voting power sufficient, in the absence of
     contingencies, to elect a majority of the board of direc-
     tors or other persons performing similar functions of
     such corporation or other entity are at the time directly
     or indirectly beneficially owned or otherwise controlled
     by such Person and any Affiliate or Associate of such
     Person.
     
                       (pp)  "Substitution Period" shall have the
     meaning set forth in Section 11(a)(iii) hereof.
     
                       (qq)  "Summary of Rights" shall have the
     meaning set forth in Section 3(b) hereof.
     
                       (rr)  "Trading Day" shall have the meaning
     set forth in Section 11(d) hereof.
     
                       (ss)  "Triggering Event" shall mean any
     Section 11(a)(ii) Event or any Section 13 Event.
     
                       (tt)  "1987 Agreement" shall have the
     meaning set forth in the first "WHEREAS" clause at the
     beginning of this Agreement.
     
               Section 2.  Appointment of Rights Agent.  The
     Company has appointed the Rights Agent to act as agent
     for the Company and the holders of the Rights (who, in
     accordance with Section 3 hereof, shall prior to the Dis-
     tribution Date also be the holders of the Common Stock of
     the Company) in accordance with the terms and conditions
     hereof, and the Rights Agent hereby accepts such appoint-
     ment.  The Company may from time to time appoint such Co-
     Rights Agents as it may deem necessary or desirable, upon
     ten days' prior written notice to the Rights Agent.  The

                                     8
/15



     Rights Agent shall have no duty to supervise, and in no
     event shall be liable for, the acts or ommissions of any
     such Co-Rights Agent.  In the event that the Company ap-
     points one or more Co-Rights Agents, the respective
     duties of the Rights Agent and any Co-Rights Agents shall
     be as the Company shall determine, and any actions which
     may be taken by the Rights Agent pursuant to the terms of
     this Agreement may be taken by any such Co-Rights Agent.
     
               Section 3.  Issuance of Rights Certificates.
     
                       (a)  Until the earliest of (i) the Close
     of Business on the tenth Business Day (or such specified
     or unspecified later date as may be determined by the
     Board before the occurrence of a Distribution Date) after
     the Stock Acquisition Date (or, if the tenth Business Day
     (or such later date) after the Stock Acquisition Date
     occurs before the Record Date, the Close of Business on
     the Record Date), (ii) the Close of Business on the tenth
     Business Day (or such specified or unspecified later date
     as may be determined by the Board before the occurrence
     of a Distribution Date) after the date that a tender or
     exchange offer by any Person (other than an Exempt Per-
     son) is first published or sent or given within the
     meaning of Rule 14d-2(a) of the General Rules and Regula-
     tions under the Exchange Act if upon consummation thereof
     such Person would be the Beneficial Owner of 15% or more
     of the Common Stock of the Company then outstanding (the
     earlier of (i) and (ii) being herein referred to as the
     "Distribution Date"), (x) the Rights will be evidenced
     (subject to the provisions of paragraphs (b) and (c) of
     this Section 3) by the certificates for the Common Stock
     of the Company registered in the names of the holders
     thereof (which certificates shall be deemed also to be
     certificates for Rights) and not by separate certificates
     and (y) the Rights will be transferable only in connec-
     tion with the transfer of the underlying shares of Common
     Stock of the Company (including a transfer to the Compa-
     ny).  As soon as practicable after the Distribution Date,
     the Rights Agent will send by first-class, insured,
     postage prepaid mail, to each record holder of the Common
     Stock of the Company as of the Close of Business on the
     Distribution Date, at the address of such holder shown on
     the records of the Company, one or more rights certifi-
     cates, substantially in the form attached hereto as
     Exhibit A (the "Rights Certificates"), evidencing one
     Right for each share of Common Stock of the Company so

                                     9
/16



     held, subject to adjustment as provided herein.  In the
     event that an adjustment in the number of Rights per
     share of Common Stock of the Company has been made pursu-
     ant to Section 11(i) hereof, at the time of distribution
     of the Rights Certificates, the Company shall not be re-
     quired to issue Rights Certificates evidencing fractional
     Rights, but may, in lieu thereof, make the necessary and
     appropriate rounding adjustments (in accordance with
     Section 14(a) hereof) so that Rights Certificates repre-
     senting only whole numbers of Rights are distributed and
     cash is paid in lieu of any fractional Rights.  As of and
     after the Distribution Date, the Rights will be evidenced
     solely by such Rights Certificates.
     
                       (b)  The Company sent a copy of a Summary
     of Rights, in substantially the form attached as Exhibit
     B to the 1987 Agreement (the "Summary of Rights"), by
     first-class, postage prepaid mail, to each record holder
     of the Common Stock of the Company as of the Close of
     Business on December 31, 1987, at the address of such
     holder then shown on the records of the Company.  With
     respect to certificates for the Common Stock of the
     Company outstanding as of the Record Date, as set forth
     in paragraph (a) above, until the earlier of the Distri-
     bution Date or the Expiration Date, the Rights will be
     evidenced by (i) such certificates for the Common Stock
     of the Company with or without a copy of the Summary of
     Rights attached or (ii) certificates for the Common Stock
     of the Company as legended pursuant to the terms of the
     1987 Agreement, and the registered holders of the Common
     Stock of the Company shall also be the registered holders
     of the associated Rights.  Until the earlier of the
     Distribution Date or the Expiration Date, the transfer of
     any certificates representing shares of Common Stock of
     the Company in respect of which Rights have been issued
     shall also constitute the transfer of the Rights associ-
     ated with such shares of Common Stock of the Company.
     
                       (c)  Rights shall be issued in respect of
     all shares of Common Stock of the Company which are
     issued (whether originally issued or from the Company's
     treasury) after the Record Date but prior to the earlier
     of the Distribution Date or the Expiration Date and, to
     the extent provided in Section 22 hereof, in respect of
     shares of Common Stock of the Company issued after the
     Distribution Date and prior to the Expiration Date. 
     Certificates representing such shares of Common Stock of

                                    10
/17



     the Company shall also be deemed to be certificates for
     Rights, and shall, as promptly as practicable following
     the Record Date, bear the following legend:
     
               This certificate also evidences and enti-
               tles the holder hereof to certain Rights as set
               forth in the Renewed Rights Agreement between
               Ionics, Incorporated (the "Company") and
               BankBoston, N.A. (the "Rights Agent") dated as
               of August 19, 1997, as the same may be amended,
               restated, renewed or extended from time to time
               (the "Rights Agreement"), the terms of which
               are hereby incorporated herein by reference and
               a copy of which is on file at the principal of-
               fices of the Company.  Under certain circum-
               stances, as set forth in the Rights Agreement,
               such Rights will be evidenced by separate cer-
               tificates and will no longer be evidenced by
               this certificate.  The Company will mail to the
               holder of this certificate a copy of the Rights
               Agreement, as in effect on the date of mailing,
               without charge, promptly after receipt of a
               written request therefor.  Under certain cir-
               cumstances set forth in the Rights Agreement,
               Rights beneficially owned (as such term is
               defined in the Rights Agreement) by any Person
               who is, was or becomes an Acquiring Person or
               any Affiliate or Associate thereof (as such
               terms are defined in the Rights Agreement),
               whether currently held by or on behalf of such
               Person or by any subsequent holder, may become
               null and void.  The Rights shall not be exer-
               cisable, and shall be void so long as held, by
               a holder in any jurisdiction where the requi-
               site qualification to the issuance to such
               holder, or the exercise by such holder, of the
               Rights in such jurisdiction shall not have been
               obtained or be obtainable.
     
     With respect to such certificates containing the forego-
     ing legend, until the earlier of (i) the Distribution
     Date or (ii) the Expiration Date, the Rights associated
     with the Common Stock of the Company represented by such
     certificates shall be evidenced by such certificates
     alone, and registered holders of Common Stock of the
     Company shall also be the registered holders of the asso-
     ciated Rights, and the transfer of any of such certifi-

                                    11
/18



     cates shall also constitute the transfer of the Rights
     associated with the Common Stock of the Company repre-
     sented by such certificates.
     
               Section 4.  Form of Rights Certificates.
     
                       (a)  The Rights Certificates (and the
     forms of election to purchase, assignment and certificate
     contained therein to be printed on the reverse thereof)
     shall each be substantially in the form attached hereto
     as Exhibit A and may have such marks of identification or
     designation and such legends, summaries or endorsements
     printed thereon as the Company may deem appropriate and
     as are not inconsistent with the provisions of this
     Agreement, or as may be required to comply with any
     applicable law or with any rule or regulation made pursu-
     ant thereto or with any rule or regulation of any stock
     exchange on which the Rights may from time to time be
     listed, or to conform to usage.  Subject to the provi-
     sions of Section 11 and Section 22 hereof, the Rights
     Certificates, whenever distributed, shall be dated as of
     the Record Date and on their face shall entitle the
     holders thereof to purchase such number of shares of
     Common Stock of the Company as shall be set forth therein
     at the exercise price set forth therein (such exercise
     price per share of Common Stock of the Company, as ad-
     justed from time to time hereunder, the "Purchase
     Price"), but the amount and type of securities purchas-
     able upon the exercise of each Right and the Purchase
     Price thereof shall be subject to adjustment as provided
     herein.
     
                       (b)  Any Rights Certificate issued pursu-
     ant to Section 3(a) or Section 22 hereof that represents
     Rights beneficially owned by:  (i) an Acquiring Person or
     any Associate or Affiliate of an Acquiring Person, (ii) a
     transferee of an Acquiring Person (or of any such Associ-
     ate or Affiliate) who becomes a transferee after the
     Acquiring Person becomes such or (iii) a transferee of an
     Acquiring Person (or of any such Associate or Affiliate)
     who becomes a transferee prior to or concurrently with
     the Acquiring Person becoming such and receives such
     Rights pursuant to either (A) a transfer (whether or not
     for consideration) from the Acquiring Person to holders
     of equity interests in the Acquiring Person or to any
     Person with whom the Acquiring Person has any continuing
     agreement, arrangement or understanding (whether or not

                                    12
/19



     in writing) regarding the transferred Rights or (B) a
     transfer which the Board, in its sole discretion, has
     determined is part of a plan, arrangement or understand-
     ing which has as a primary purpose or effect avoidance of
     the provisions of Section 7(e) hereof, and any Rights
     Certificate issued pursuant to Section 6 or Section 11
     hereof upon transfer, exchange, replacement or adjustment
     of any other Rights Certificate referred to in this
     sentence, shall contain (to the extent feasible) the
     following legend:
     
          The Rights represented by this Rights Certifi-
               cate are or were beneficially owned by a Person
               who was or became an Acquiring Person or an
               Affiliate or Associate of an Acquiring Person
               (as such terms are defined in the Renewed
               Rights Agreement).  Accordingly, this Rights
               Certificate and the Rights represented hereby
               may become null and void in the circumstances
               specified in Section 7(e) of such Agreement.
     
               Section 5.  Countersignature and Registration.
     
                       (a)  The Rights Certificates shall be
     executed under seal on behalf of the Company by its
     Chairman of the Board, its President or any Vice Presi-
     dent, either manually or by facsimile signature, and by
     the Treasurer or any Assistant Treasurer of the Company,
     either manually or by facsimile signature.  The Rights
     Certificates shall be manually countersigned by an autho-
     rized signatory of the Rights Agent and shall not be
     valid for any purpose unless so countersigned.  In case
     any officer of the Company who shall have signed any of
     the Rights Certificates shall cease to be such officer of
     the Company before countersignature by an authorized
     signatory of the Rights Agent and issuance and delivery
     by the Company, such Rights Certificates, nevertheless,
     may be countersigned by an authorized signatory of the
     Rights Agent and issued and delivered by the Company with
     the same force and effect as though the person who signed
     such Rights Certificates had not ceased to be such offi-
     cer of the Company; and any Rights Certificate may be
     signed on behalf of the Company by any person who, at the
     actual date of the execution of such Rights Certificate,
     shall be a proper officer of the Company to sign such
     Rights Certificate, although at the date of the execution

                                    13
/20



     of this Agreement any such person was not such an offi-
     cer.
     
                       (b)  Following the Distribution Date, the
     Rights Agent will keep or cause to be kept, at its prin-
     cipal office or offices designated as the appropriate
     place for surrender of Rights Certificates upon exercise
     or transfer, books for registration and transfer of the
     Rights Certificates issued hereunder.  Such books shall
     show the names and addresses of the respective holders of
     the Rights Certificates, the number of Rights evidenced
     on its face by each of the Rights Certificates and the
     date of each of the Rights Certificates.
     
               Section 6.  Transfer, Split Up, Combination and
     Exchange of Rights Certificates; Mutilated, Destroyed,
     Lost or Stolen Rights Certificates.
     
                       (a)  Subject to the provisions of Section
     4(b), Section 7(e) and Section 14 hereof, at any time
     after the Close of Business on the Distribution Date, and
     at or prior to the Close of Business on the Expiration
     Date, any Rights Certificate or Rights Certificates may
     be transferred, split up, combined or exchanged for
     another Rights Certificate or Rights Certificates enti-
     tling the registered holder to purchase a like number of
     shares of Common Stock of the Company (or, following the
     occurrence of a Triggering Event, other securities, cash
     or other assets, as the case may be) as the Rights Cer-
     tificate or Rights Certificates surrendered then entitled
     such holder (or former holder in the case of a transfer)
     to purchase.  Any registered holder desiring to transfer,
     split up, combine or exchange any Rights Certificate or
     Rights Certificates shall make such request in writing
     delivered to the Rights Agent and shall surrender the
     Rights Certificate or Rights Certificates to be trans-
     ferred, split up, combined or exchanged, with the forms
     of assignment and certificate contained therein duly
     executed, at the principal office or offices of the
     Rights Agent designated for such purpose.  Neither the
     Rights Agent nor the Company shall be obligated to take
     any action whatsoever with respect to the transfer of any
     such surrendered Rights Certificate or Rights Certifi-
     cates until the registered holder shall have completed
     and signed the certificate contained in the form of
     assignment on the reverse side of such Rights Certificate
     or Rights Certificates and shall have provided such addi-

                                    14
/21



     tional evidence of the identity of the Beneficial Owner
     (or former Beneficial Owner) or Affiliates or Associates
     thereof as the Company shall reasonably request.  There-
     upon, the Rights Agent shall, subject to Section 4(b),
     Section 7(e) and Section 14 hereof, countersign and
     deliver to the Person entitled thereto a Rights Certifi-
     cate or Rights Certificates, as the case may be, as so
     requested.  The Company may require payment from the
     holder of a Rights Certificate of a sum sufficient to
     cover any tax or governmental charge that may be imposed
     in connection with any transfer, split up, combination or
     exchange of Rights Certificates.
     
                       (b)  Upon receipt by the Company and the
     Rights Agent of evidence reasonably satisfactory to them
     of the loss, theft, destruction or mutilation of a valid
     Rights Certificate and, in case of loss, theft or de-
     struction, of indemnity or security reasonably satisfac-
     tory to them and reimbursement to the Company and the
     Rights Agent of all reasonable expenses incidental there-
     to, and upon surrender to the Rights Agent and cancella-
     tion of the Rights Certificate if mutilated, the Company
     will execute and deliver a new Rights Certificate of like
     tenor to the Rights Agent for countersignature and deliv-
     ery to the registered owner in lieu of the Rights Certif-
     icate so lost, stolen, destroyed or mutilated.
     
               Section 7.  Exercise of Rights; Purchase Price;
     Expiration Date of Rights.
     
                       (a)  Subject to Section 7(e) hereof, the
     registered holder of any Rights Certificate may exercise
     the Rights evidenced thereby (except as otherwise provid-
     ed herein, including without limitation, the restrictions
     on exercisability set forth in Section 9(c), Section
     11(a)(iii) and Section 23(a) hereof) in whole or in part
     at any time after the Distribution Date upon surrender of
     the Rights Certificate, with the form of election to
     purchase and the certificate contained therein duly
     executed, to the Rights Agent at the principal office or
     offices of the Rights Agent designated for such purpose,
     together with payment of the aggregate Purchase Price
     with respect to the total number of shares of Common
     Stock of the Company (or, following the occurrence of a
     Triggering Event, other securities, cash or other assets,
     as the case may be) as to which such surrendered Rights
     are then exercisable, at or prior to the earliest of (i)

                                    15
/22



     the Final Expiration Date, (ii) the time at which the
     Rights are redeemed as provided in Section 23 hereof and
     (iii) the time at which the Rights expire pursuant to
     Section 13(d) hereof (the earliest of (i), (ii) and (iii)
     being herein referred to as the "Expiration Date").
     
                       (b)  The Purchase Price for each share of
     Common Stock of the Company pursuant to the exercise of
     a Right shall initially be $175, shall be subject to ad-
     justment from time to time as provided in Sections 11
     and 13(a) hereof and shall be payable in accordance with
     paragraph (c) below.
     
                       (c)  Upon receipt of a Rights Certificate
     representing exercisable Rights, with the form of elec-
     tion to purchase and the certificate contained therein
     duly executed, accompanied by payment, with respect to
     each Right so exercised, of the Purchase Price, as such
     amount may be reduced pursuant to Section 11(a)(iii)
     hereof, for each share of Common Stock of the Company
     (or, following a Triggering Event, for other securities,
     cash or other assets, as the case may be) to be purchased
     (as set forth below) and an amount equal to any applica-
     ble transfer tax, the Rights Agent shall, subject to
     Sections 7(f) and 20(k) hereof, thereupon promptly (i)
     (A) requisition from any transfer agent of the shares of
     Common Stock of the Company (or make available, if the
     Rights Agent is the transfer agent for such shares)
     certificates for the total number of shares of Common
     Stock of the Company to be purchased, and the Company
     hereby irrevocably authorizes its transfer agent to
     comply with all such requests or (B) if the Company shall
     have elected to deposit the total number of shares of
     Common Stock of the Company issuable upon exercise of the
     Rights hereunder with a depositary agent, requisition
     from the depositary agent depositary receipts represent-
     ing such number of shares of Common Stock of the Company
     as are to be purchased (in which case certificates for
     the shares of Common Stock of the Company represented by
     such receipts shall be deposited by the transfer agent
     with the depositary agent) and the Company will direct
     the depositary agent to comply with such request, (ii)
     requisition from the Company the amount of cash, if any,
     to be paid in lieu of fractional shares in accordance
     with Section 14 hereof, (iii) after receipt of such
     certificates or depositary receipts, cause the same to be
     delivered to, or upon the order of, the registered holder

                                    16
/23



     of such Rights Certificate, registered in such name or
     names as may be designated by such holder, and (iv) after
     receipt thereof, deliver such cash, if any, to, or upon
     the order of, the registered holder of such Rights Cer-
     tificate.  The payment of the Purchase Price (as such
     amount may be reduced pursuant to Section 11(a)(iii)
     hereof) shall be made in cash or by certified check,
     cashier's check or bank draft payable to the order of the
     Company.  In the event that the Company is obligated to
     issue other securities, pay cash or distribute other
     property pursuant to this Section 7(c) or Section 11(a)
     hereof, the Company will make all arrangements necessary
     so that such other securities, cash or other property are
     available for distribution by the Rights Agent, if and
     when appropriate.  In the event that, immediately prior
     to the occurrence of a Distribution Date, the number of
     shares of Common Stock of the Company which are autho-
     rized by the Company's articles of organization, as
     amended and in effect at such time, but not outstanding
     or reserved for issuance for purposes other than upon
     exercise of the Rights is not sufficient to permit exer-
     cise in full of the Rights in accordance with their
     terms, the Company, acting by resolution of the Board,
     shall follow the same procedures and may take any of the
     same actions in connection with the exercise of Rights
     under this Section 7(c) as are required or permitted to
     be followed or taken pursuant to Section 11(a)(iii)
     hereof with respect to substitution of value in connec-
     tion with the exercise of Rights under Section 11(a)(ii)
     hereof.  The Company reserves the right to require prior
     to the occurrence of a Triggering Event that, upon any
     exercise of Rights, a number of Rights be exercised so
     that only whole shares of Common Stock of the Company
     would be issued.
     
                       (d)  In case the registered holder of any
     Rights Certificate shall exercise less than all the
     Rights evidenced thereby, a new Rights Certificate evi-
     dencing Rights equivalent to the Rights remaining unexer-
     cised shall be issued by the Rights Agent and delivered
     to, or upon the order of, the registered holder of such
     Rights Certificate, registered in such name or names as
     may be designated by such holder, subject to the provi-
     sions of Section 14 hereof.
     
                       (e)  Notwithstanding anything in this
     Agreement to the contrary, from and after the first

                                    17
/24



     occurrence of a Section 11(a)(ii) Event, any Rights bene-
     ficially owned by (i) an Acquiring Person or an Affiliate
     or Associate of an Acquiring Person which the Board, in
     its sole discretion, determines is or was involved in or
     caused or facilitated, directly or indirectly (including
     through any change in the Board), such Section 11(a)(ii)
     Event, (ii) a transferee of any such Acquiring Person (or
     of any such Affiliate or Associate) who becomes a trans-
     feree after such Acquiring Person becomes such or (iii) a
     transferee of any such Acquiring Person (or of any such
     Associate or Affiliate) who becomes a transferee prior to
     or concurrently with such Acquiring Person becoming such
     and receives such Rights pursuant to either (A) a trans-
     fer (whether or not for consideration) from such Acquir-
     ing Person to holders of equity interests in such Acquir-
     ing Person or to any Person with whom such Acquiring
     Person has any continuing agreement, arrangement or
     understanding (whether or not in writing) regarding the
     transferred Rights or (B) a transfer which the Board has
     determined is part of a plan, arrangement or understand-
     ing which has as a primary purpose or effect the avoid-
     ance of this Section 7(e), shall become null and void
     without any further action, and no holder of such Rights
     shall have any rights whatsoever with respect to such
     Rights, whether under any provision of this Agreement or
     otherwise.  The Company shall use all reasonable efforts
     to ensure that the provisions of this Section 7(e) and
     Section 4(b) hereof are complied with, but shall have no
     liability to any holder of Rights Certificates or other
     Person as a result of its failure to make any determina-
     tions with respect to an Acquiring Person or any of their
     Affiliates, Associates or transferees hereunder.
     
                       (f)  Notwithstanding anything in this
     Agreement to the contrary, neither the Rights Agent nor
     the Company shall be obligated to undertake any action
     with respect to a registered holder of any Rights Certif-
     icate upon the occurrence of any purported assignment or
     exercise as set forth in this Section 7 unless such
     registered holder shall have (i) completed and signed the
     certificate contained in the form of assignment or elec-
     tion to purchase set forth on the reverse side of the
     Rights Certificate surrendered for such assignment or
     exercise and (ii) provided such additional evidence of
     the identity of the Beneficial Owner (or former Benefi-
     cial Owner) or Affiliates or Associates thereof as the
     Company shall reasonably request.

                                    18
/25


     

               Section 8.  Cancellation and Destruction of
     Rights Certificates.  All Rights Certificates surrendered
     for the purpose of exercise, transfer, split up, combina-
     tion or exchange shall, if surrendered to the Company or
     any of its agents, be delivered to the Rights Agent for
     cancellation or in cancelled form, or, if surrendered to
     the Rights Agent, shall be cancelled by it, and no Rights
     Certificates shall be issued in lieu thereof except as
     expressly permitted by any of the provisions of this
     Agreement.  The Company shall deliver to the Rights Agent
     for cancellation and retirement, and the Rights Agent
     shall so cancel and retire, any other Rights Certificate
     purchased or acquired by the Company otherwise than upon
     the exercise thereof.  The Rights Agent shall deliver all
     cancelled Rights Certificates to the Company, or shall,
     at the written request of the Company, destroy such
     cancelled Rights Certificates and, in such case, shall
     deliver a certificate of destruction thereof to the
     Company.
     
               Section 9.  Reservation and Availability of
     Capital Stock.
     
                       (a)  The Company covenants and agrees
     that, from and after the Distribution Date, it will cause
     to be reserved and kept available out of its authorized
     and unissued shares of Common Stock of the Company (and,
     following the occurrence of a Triggering Event, other
     securities) or out of its authorized and issued shares of
     Common Stock of the Company held in its treasury, the
     number of shares of Common Stock of the Company (and,
     following the occurrence of a Triggering Event, the
     amount of other securities) that, as provided in this
     Agreement (including Section 11(a)(iii) hereof), will be
     sufficient to permit the exercise in full of all out-
     standing Rights.  
     
                       (b)  So long as the shares of Common Stock
     of the Company (and, following the occurrence of a Trig-
     gering Event, other securities) issuable and deliverable
     upon the exercise of the Rights may be listed on any
     national securities exchange, the Company shall use all
     reasonable efforts to cause, from and after such time as
     the Rights become exercisable, all shares reserved for
     such issuance to be listed on such exchange upon official
     notice of issuance upon such exercise.

                                    19
/26


     

                       (c)  The Company shall use all reasonable
     efforts to (i) file, as soon as practicable following the
     earliest date after the first occurrence of a Triggering
     Event in which the consideration to be delivered by the
     Company upon exercise of the Rights has been determined
     in accordance with this Agreement, or as soon as required
     by law following the Distribution Date, as the case may
     be, a registration statement under the Act on an appro-
     priate form with respect to the Common Stock or other
     securities purchasable upon exercise of the Rights, (ii)
     cause such registration statement to become effective as
     soon as practicable after such filing and (iii) cause
     such registration statement to remain effective (with a
     prospectus at all times meeting the requirements of the
     Act) until the earlier of (A) the date as of which the
     Rights are no longer exercisable for such securities and
     (B) the Expiration Date.  The Company will also take such
     action as may be appropriate under, or to ensure compli-
     ance with, the securities or "blue sky" laws of the
     various states and other jurisdictions in connection with
     the exercisability of the Rights.  The Company may,
     acting by resolution of the Board, temporarily suspend,
     for a period of time not to exceed 90 days after the date
     set forth in clause (i) of the first sentence of this
     Section 9(c), the exercisability of the Rights in order
     to prepare and file such registration statement and
     permit it to become effective.  In the event of any such
     suspension, the Company shall issue a public announcement
     stating that the exercisability of the Rights has been
     temporarily suspended and shall issue a public announce-
     ment at such time as the suspension is no longer in
     effect.  In addition, if the Company shall determine that
     a registration statement is required in other circum-
     stances following the Distribution Date, the Company may
     similarly temporarily suspend the exercisability of the
     Rights until such time as a registration statement has
     been declared effective.  Notwithstanding any provision
     of this Agreement to the contrary, the Rights shall not
     be exercisable in any jurisdiction if the requisite
     qualification in such jurisdiction shall not have been
     obtained, or the exercise thereof shall not otherwise be
     permitted under applicable law or a registration state-
     ment shall not have been declared effective.
     
                       (d)  The Company covenants and agrees that
     it will take all such action as may be necessary to
     ensure that all shares of Common Stock of the Company

                                    20
/27



     (and, following the occurrence of a Triggering Event,
     other securities) delivered upon exercise of Rights
     shall, at the time of delivery of the certificates for
     such shares (subject to payment of the Purchase Price),
     be duly and validly authorized and issued and fully paid
     and nonassessable.
     
                       (e)  The Company further covenants and
     agrees that, except as set forth in Section 6(a) hereof
     and this Section 9(e), it will pay when due and payable
     any and all federal and state transfer taxes and charges
     which may be payable in respect of the issuance or deliv-
     ery of the Rights Certificates and of any certificates
     for a number of shares of Common Stock of the Company (or
     other securities, as the case may be) upon the exercise
     of Rights.  The Company shall not, however, be required
     to pay any transfer tax which may be payable in respect
     of any transfer or delivery of Rights Certificates to a
     Person other than, or the issuance or delivery of a
     number of shares of Common Stock of the Company (or other
     securities, as the case may be) in respect of a name
     other than that of, the registered holder of the Rights
     Certificates evidencing Rights surrendered for exercise,
     nor shall the Company be required to issue or deliver any
     certificates for a number of shares of Common Stock of
     the Company (or other securities, as the case may be) in
     a name other than that of the registered holder upon the
     exercise of any Rights until such tax shall have been
     paid (any such tax being payable by the holder of such
     Rights Certificate at the time of surrender) or until it
     has been established to the Company's satisfaction that
     no such tax is due.
     
               Section 10.  Record Date for Securities Issued
     Upon Exercise.  Each Person in whose name any certificate
     for a number of shares of Common Stock of the Company (or
     other securities, as the case may be) is issued upon the
     exercise of Rights shall for all purposes be deemed to
     have become the holder of record of such shares of Common
     Stock of the Company (or other securities, as the case
     may be) represented thereby on, and such certificate
     shall be dated, the date upon which the Rights Certifi-
     cate evidencing such Rights was duly surrendered and
     payment of the Purchase Price (and all applicable trans-
     fer taxes) was made; provided, however, that if the date
     of such surrender and payment is a date upon which the
     transfer books for the Common Stock (or other securities,

                                    21
/28



     as the case may be) of the Company are closed, such
     Person shall be deemed to have become the record holder
     of such shares (fractional or otherwise) on, and such
     certificate shall be dated, the next succeeding Business
     Day on which the transfer books for the Common Stock (or
     other securities, as the case may be) of the Company are
     open.  Prior to the exercise of the Rights evidenced
     thereby, the holder of a Rights Certificate, as such,
     shall not be entitled to any rights of a stockholder of
     the Company (or the Principal Party) with respect to
     shares for which the Rights shall be exercisable, includ-
     ing without limitation the right to vote, to receive
     dividends or other distributions or to exercise any
     preemptive rights, and shall not be entitled to receive
     any notice of any proceedings of the Company (or the
     Principal Party), except as provided herein.
     
               Section 11.  Adjustment of Purchase Price,
     Number and Kind of Shares or Number of Rights.  The Pur-
     chase Price, the number and kind of shares, or fractions
     thereof, purchasable upon exercise of each Right and the
     number of Rights outstanding are subject to adjustment
     from time to time as provided in this Section 11.
     
                       (a)  (i) In the event the Company shall
                at any time after the date of this Agreement
               (A) declare a dividend on the outstanding
               shares of Common Stock of the Company payable
               in shares of Common Stock of the Company, (B)
               subdivide or split the outstanding shares of
               Common Stock of the Company, (C) combine or
               consolidate the outstanding shares of Common
               Stock of the Company into a smaller number of
               shares or (D) issue any shares of its capital
               stock in a reclassification of the Common Stock
               of the Company (including any such reclassifi-
               cation in connection with a consolidation or
               merger in which the Company is the continuing
               or surviving corporation), except as otherwise
               provided in this Section 11(a) and Section 7(e)
               hereof, the Purchase Price in effect at the
               time of the record date for such dividend or of
               the effective date of such subdivision, split,
               combination, consolidation or reclassification,
               and the number and kind of shares of Common
               Stock (or other securities, as the case may be)
               issuable on such date, shall be proportionately

                                    22
/29



               adjusted so that the holder of any Right exer-
               cised after such time shall be entitled to
               receive, upon payment of the Purchase Price
               then in effect, the aggregate number and kind
               of shares of Common Stock or capital stock, as
               the case may be, which, if such Right had been
               exercised immediately prior to such date,
               whether or not such Right was then exercisable,
               and at a time when the transfer books for the
               Common Stock (or other capital stock, as the
               case may be) of the Company were open, he would
               have owned upon such exercise and been entitled
               to receive by virtue of such dividend, subdivi-
               sion, split, combination, consolidation or re-
               classification.  If an event occurs which would
               require an adjustment under both this Section
               11(a)(i) and Section 11(a)(ii) hereof, the
               adjustment provided for in this Section
               11(a)(i) shall be in addition to, and shall be
               made prior to, any adjustment required pursuant
               to Section 11(a)(ii) hereof.
     
                          (ii)  In the event (a "Section
               11(a)(ii) Event") that any Person (other than
               an Exempt Person), alone or together with its
               Affiliates and Associates, shall, at any time
               after the Rights Dividend Declaration Date,
               become the Beneficial Owner of 15% or more of
               the shares of Common Stock of the Company then
               outstanding, unless the event causing (A) the
               15% threshold to be crossed is a transaction
               set forth in Section 13(a) hereof or (B) is an
               acquisition of shares of Common Stock of the
               Company pursuant to a tender offer or an ex-
               change offer for all outstanding shares of
               Common Stock of the Company at a price and on
               terms determined by at least a majority of the
               Outside Directors, after receiving advice from
               one or more investment banking firms, to be (x)
               at a price that is fair to stockholders (taking
               into account all factors which such members of
               the Board deem relevant, including without
               limitation prices which could reasonably be
               achieved if the Company or its assets were sold
               on an orderly basis designed to realize maximum
               value) and (y) otherwise in the best interests
               of the Company and its stockholders, then

                                    23
/30



               promptly after the date of occurrence of a Sec-
               tion 11(a)(ii) Event, proper provision shall be
               made so that each holder of a Right (except as
               provided below and in Section 7(e) hereof)
               shall thereafter have the right to receive,
               upon exercise thereof at the then current Pur-
               chase Price in accordance with the terms of
               this Agreement, such number of shares of Common
               Stock of the Company as shall equal the result
               obtained by (1) multiplying the then current
               Purchase Price by the then number of shares of
               Common Stock of the Company for which a Right
               was exercisable immediately prior to the first
               occurrence of a Section 11(a)(ii) Event (wheth-
               er or not such Right was then exercisable) and
               (2) dividing that product (which following such
               first occurrence, shall thereafter be referred
               to as the "Purchase Price" for each Right and
               for all purposes of this Agreement) by 50% of
               the Current Market Price per share of Common
               Stock of the Company on the date of such first
               occurrence (such number of shares being re-
               ferred to as the "Adjustment Shares").
     
                         (iii)  In lieu of issuing any
               shares of Common Stock of the Company in accor-
               dance with Section 11(a)(ii) hereof, the Compa-
               ny, acting by resolution of the Board, may, and
               in the event that the number of shares of Com-
               mon Stock of the Company which are authorized
               by the Company's articles of organization but
               not outstanding or reserved for issuance for
               purposes other than upon exercise of the Rights
               is not sufficient to permit the exercise in
               full of the Rights in accordance with the fore-
               going subparagraph (ii) of this Section 11(a),
               the Company, acting by resolution of the Board,
               shall: (A) determine the excess of (1) the
               value of the Adjustment Shares issuable upon
               the exercise of a Right (the "Current Value")
               over (2) the Purchase Price attributable to
               each Right (such excess being referred to as
               the "Spread") and (B) with respect to all or a
               portion of each Right (subject to Section 7(e)
               hereof), make adequate provision to substitute
               for the Adjustment Shares, upon payment of the
               applicable Purchase Price, (1) cash, (2) a

                                    24
/31



               reduction in the Purchase Price, (3) equity
               securities of the Company other than Common
               Stock of the Company (including without limita-
               tion shares, or units of shares, of preferred
               stock which the Board has deemed to have the
               same value as shares of Common Stock of the
               Company (such shares of preferred stock being
               referred to as "Common Stock Equivalents")),
               (4) debt securities of the Company, (5) other
               assets or (6) any combination of the foregoing
               which, when added to any shares of Common Stock
               of the Company issued upon such exercise, has
               an aggregate value equal to the Current Value,
               where such aggregate value has been determined
               by the Board based upon the advice of a nation-
               ally recognized investment banking firm select-
               ed by the Board; provided, however, that if the
               Company shall not have made adequate provision
               to deliver value pursuant to clause (B) above
               within 30 days following the later of (x) the
               first occurrence of a Section 11(a)(ii) Event
               and (y) the date on which the Company's right
               of redemption pursuant to Section 23(a) hereof,
               as such date may be extended pursuant to Sec-
               tion 23(a) hereof or amended pursuant to Sec-
               tion 26 hereof, expires (the later of (x) and
               (y) being referred to herein as the "Section
               11(a)(ii) Trigger Date"), then the Company
               shall be obligated to deliver, upon the surren-
               der for exercise of a Right and without requir-
               ing payment of the Purchase Price, shares of
               Common Stock of the Company (to the extent
               available) and then, if necessary, cash, which
               shares and cash have an aggregate value equal
               to the Spread.  If the Board shall determine in
               good faith that it is likely that sufficient
               additional shares of Common Stock of the Compa-
               ny could be authorized for issuance upon exer-
               cise in full of the Rights, the 30-day period
               set forth above may be extended to the extent
               necessary, but not more than 90 days after the
               Section 11(a)(ii) Trigger Date, in order that
               the Company may seek stockholder approval for
               the authorization of such additional shares
               (such period, as it may be extended, the "Sub-
               stitution Period").  To the extent that the
               Company determines that some action need be

                                    25
/32



               taken pursuant to the first or second sentences
               of this Section 11(a)(iii), the Company (x)
               shall provide, subject to Section 7(e) hereof,
               that such action shall apply uniformly to all
               outstanding Rights and (y) may suspend the
               exercisability of the Rights until the expira-
               tion of the Substitution Period in order to
               seek any authorization of additional shares or
               to decide the appropriate form of distribution
               to be made pursuant to such first sentence and
               to determine the value thereof.  In the event
               of any such suspension, the Company shall issue
               a public announcement stating that the
               exercisability of the Rights has been tempo-
               rarily suspended and a public announcement at
               such time as the suspension is no longer in
               effect.  For purposes of this Section
               11(a)(iii), the value of the Common Stock of
               the Company shall be the Current Market Price
               per share of the Common Stock of the Company on
               the Section 11(a)(ii) Trigger Date, and the
               value of any Common Stock Equivalent shall be
               deemed to be equal to the value of the Common
               Stock of the Company on such date.
     
                       (b)  In case the Company shall fix a
     record date for the issuance of rights, options or war-
     rants to all holders of Common Stock of the Company
     entitling them to subscribe for or purchase (for a period
     expiring within 45 calendar days after such record date)
     Common Stock of the Company ("Common Stock Equivalents")
     or securities convertible into Common Stock of the Compa-
     ny or Common Stock Equivalents at a price per share of
     Common Stock of the Company or per share of Common Stock
     Equivalents (or having a conversion price per share, if a
     security convertible into Common Stock of the Company or
     Common Stock Equivalents) less than the Current Market
     Price per share of Common Stock of the Company on such
     record date, the Purchase Price to be in effect after
     such record date shall be determined by multiplying the
     Purchase Price in effect immediately prior to such record
     date by a fraction, the numerator of which shall be the
     sum of (i) the number of shares of Common Stock of the
     Company or Common Stock Equivalents outstanding on such
     record date, (ii) the number of shares of Common Stock of
     the Company or Common Stock Equivalents underlying secu-
     rities outstanding on such record date which are convert-

                                    26
/33



     ible into Common Stock of the Company or Common Stock
     Equivalents and (iii) the number of shares of Common
     Stock of the Company which the aggregate subscription
     price of the total number of shares of Common Stock of
     the Company or Common Stock Equivalents so to be offered
     (or the aggregate initial conversion price of the con-
     vertible securities so to be offered) would purchase at
     such Current Market Price, and the denominator of which
     shall be the sum of (i) the number of shares of Common
     Stock of the Company outstanding on such record date,
     (ii) the number of shares of Common Stock of the Company
     or Common Stock Equivalents underlying securities out-
     standing on such record date which are convertible into
     Common Stock of the Company or Common Stock Equivalents
     and (iii) the number of additional shares of Common Stock
     of the Company or Common Stock Equivalents to be offered
     for subscription or purchase (or into which the convert-
     ible securities so to be offered are initially convert-
     ible).  In case such subscription price may be paid by
     delivery of consideration part or all of which may be in
     a form other than cash, the value of such consideration
     shall be as determined in good faith by the Board, which
     determination shall be described in a statement filed
     with the Rights Agent and shall be conclusive for all
     purposes.  Shares of Common Stock of the Company owned by
     or held for the account of the Company shall not be
     deemed outstanding for the purpose of any such compu-
     tation.  Such adjustment shall be made successively
     whenever such a record date is fixed, and in the event
     that such rights, options or warrants are not so issued,
     the Purchase Price shall be adjusted to be the Purchase
     Price which would then be in effect if such record date
     had not been fixed.
     
                       (c)  In case the Company shall fix a
     record date for a distribution to all holders of Common
     Stock of the Company (including any such distribution
     made in connection with a consolidation or merger in
     which the Company is the continuing or surviving corpora-
     tion) of evidences of indebtedness, cash (other than a
     regular, periodic cash dividend out of the earnings or
     retained earnings of the Company), assets (other than a
     dividend payable in Common Stock of the Company, but
     including any dividend payable in stock other than Common
     Stock of the Company) or subscription rights or warrants
     (excluding those referred to in Section 11(b) hereof),
     the Purchase Price to be in effect after such record date

                                    27
/34



     shall be determined by multiplying the Purchase Price in
     effect immediately prior to such record date by a frac-
     tion, the numerator of which shall be the Current Market
     Price per share of Common Stock of the Company on such
     record date, less the fair market value (as determined in
     good faith by the Board, which determination shall be
     described in a statement filed with the Rights Agent and
     shall be conclusive for all purposes) of the portion of
     the cash, assets or evidences of indebtedness so to be
     distributed or of such subscription rights or warrants
     applicable to a share of Common Stock of the Company and
     the denominator of which shall be such Current Market
     Price per share of Common Stock of the Company.  Such
     adjustments shall be made successively whenever such a
     record date is fixed, and in the event that such dis-
     tribution is not so made, the Purchase Price shall be
     adjusted to be the Purchase Price which would have been
     in effect if such record date had not been fixed.
     
                       (d)  For the purpose of any computation
     hereunder, other than computations made pursuant to
     Section 11(a)(iii) hereof, the "Current Market Price" per
     share of Common Stock on any date shall be deemed to be
     the average of the daily closing prices per share of such
     Common Stock for the 30 consecutive Trading Days immedi-
     ately prior to such date, and for purposes of computa-
     tions made pursuant to Section 11(a)(iii) hereof, the
     Current Market Price per share of Common Stock on any
     date shall be deemed to be the average of the daily
     closing prices per share of such Common Stock for the 10
     consecutive Trading Days immediately following such date;
     provided, however, that in the event that the Current
     Market Price per share of the Common Stock is determined
     during a period following the announcement by the issuer
     of such Common Stock of (A) a dividend or distribution on
     such Common Stock payable in shares of such Common Stock
     or securities convertible into shares of such Common
     Stock (other than the Rights) or (B) any subdivision,
     combination, consolidation, reverse stock split or re-
     classification of such Common Stock, and prior to the
     expiration of the requisite 30-Trading Day or 10-Trading
     Day period, as set forth above, after the ex-dividend
     date for such dividend or distribution, or the record
     date for such subdivision, combination, consolidation,
     reverse stock split or reclassification, then, and in
     each such case, the Current Market Price shall be proper-
     ly adjusted to take into account ex-dividend trading. 

                                    28
/35



     The closing price for each day shall be the last sale
     price, regular way, or, in case no such sale takes place
     on such day, the average of the closing bid and asked
     prices, regular way, in either case as reported in the
     principal consolidated transaction reporting system with
     respect to securities listed or admitted to trading on
     the New York Stock Exchange or, if the shares of Common
     Stock are not listed or admitted to trading on the New
     York Stock Exchange, as reported in the principal consol-
     idated transaction reporting system or as quoted by the
     Nasdaq National Market with respect to securities listed
     or admitted to trading on another national securities ex-
     change or quoted by the Nasdaq National Market, respec-
     tively or, if the shares of Common Stock are not listed
     or admitted to trading on any national securities ex-
     change or quoted by the Nasdaq National Market, the last
     quoted price or, if not so quoted, the average of the
     high bid and low asked prices in the over-the-counter
     market, as reported by The Nasdaq Stock Market or such
     other quotation system then in use or, if on any such
     date the shares of Common Stock are not quoted by any
     such organization, the average of the closing bid and
     asked prices as furnished by a professional market maker
     making a market in the Common Stock selected by the
     Board.  If on any such date the Common Stock is not pub-
     licly held or not so listed, admitted to trading or quot-
     ed, and no market maker is making a market in such Common
     Stock, Current Market Price shall mean the fair value of
     such shares on such date as determined in good faith by
     the Board, which determination shall be described in a
     statement filed with the Rights Agent and shall be con-
     clusive for all purposes.  The term "Trading Day" shall
     mean a day on which the principal national securities ex-
     change on which the shares of Common Stock are listed or
     admitted to trading is open for the transaction of busi-
     ness or, if the shares of Common Stock are not listed or
     admitted to trading on any national securities exchange,
     a Business Day.
     
                       (e)  Anything herein to the contrary
     notwithstanding, no adjustment in the Purchase Price
     shall be required unless such adjustment would require an
     increase or decrease in the Purchase Price of at least
     one percent; provided, however, that any adjustments
     which by reason of this Section 11(e) are not required to
     be made shall be carried forward and taken into account
     in any subsequent adjustment.  All calculations under

                                    29
/36



     this Section 11 shall be made to the nearest one cent or
     to the nearest one-thousandth of a share of Common Stock
     of the Company as the case may be.  Notwithstanding the
     first sentence of this Section 11(e), any adjustment
     required by this Section 11 shall be made no later than
     the earlier of (i) three years from the date of the
     transaction which mandates such adjustment or (ii) the
     Expiration Date.
     
                       (f)  If as a result of an adjustment made
     pursuant to Section 11(a)(ii) or Section 13(a) hereof,
     the holder of any Right thereafter exercised shall become
     entitled to receive any shares of capital stock other
     than Common Stock of the Company, thereafter the number
     of such other shares so receivable upon exercise of any
     Right and the Purchase Price thereof (or the number of
     Rights) shall be subject to adjustment from time to time
     in a manner and on terms as nearly equivalent as practi-
     cable to the provisions with respect to the Common Stock
     of the Company contained in Sections 11(a), (b), (c),
     (e), (g), (h), (i), (j), (k), (l) and (m) hereof, and the
     provisions of Sections 7, 9, 10, 13 and 14 hereof with
     respect to the Common Stock of the Company shall apply on
     like terms to any such other shares; provided, however,
     that the Company shall not be liable for its inability to
     reserve and keep available for issuance upon exercise of
     the Rights pursuant to Section 11(a)(ii) hereof a number
     of shares of Common Stock of the Company greater than the
     number then authorized by the Company's articles of orga-
     nization, but not outstanding or reserved for any other
     purpose.
     
                       (g)  All Rights originally issued by the
     Company subsequent to any adjustment made to the Purchase
     Price hereunder shall evidence the right to purchase, at
     the adjusted Purchase Price, the number of shares of
     Common Stock of the Company purchasable from time to time
     hereunder upon exercise of the Rights, all subject to
     further adjustment as provided herein.
     
                       (h)  Unless the Company shall have exer-
     cised its election as provided in Section 11(i) hereof,
     upon each adjustment of the Purchase Price as a result of
     the calculations made in Sections 11(b) and (c) hereof,
     each Right outstanding immediately prior to the making of
     such adjustment shall thereafter evidence the right to
     purchase, at the adjusted Purchase Price, that number of

                                    30
/37



     shares of Common Stock of the Company (calculated to the
     nearest one-thousandth of a share of Common Stock) ob-
     tained by (i) multiplying (x) the number of shares of
     Common Stock of the Company covered by a Right immediate-
     ly prior to this adjustment by (y) the Purchase Price in
     effect immediately prior to such adjustment of the Pur-
     chase Price, and (ii) dividing the product so obtained by
     the Purchase Price in effect immediately after such
     adjustment of the Purchase Price.
     
                       (i)  The Company may elect on or after the
     date of any adjustment of the Purchase Price to adjust
     the number of Rights, in lieu of any adjustment in the
     number of shares of Common Stock of the Company purchas-
     able upon the exercise of a Right.  Each of the Rights
     outstanding after the adjustment in the number of Rights
     shall be exercisable for the number of shares of Common
     Stock of the Company for which a Right was exercisable
     immediately prior to such adjustment.  Each Right held of
     record prior to such adjustment of that number of Rights
     shall become the number of Rights (calculated to the
     nearest one-thousandth of a Right) obtained by dividing
     the Purchase Price in effect immediately prior to adjust-
     ment of the Purchase Price by the Purchase Price in
     effect immediately after adjustment of the Purchase
     Price.  The Company shall make a public announcement of
     its election to adjust the number of Rights, indicating
     the record date for the adjustment, and, if known at the
     time, the amount of the adjustment to be made.  This
     record date may be the date on which the Purchase Price
     is adjusted or any day thereafter, but, if the Rights
     Certificates have been issued, shall be at least 10 days
     later than the date of the public announcement.  If
     Rights Certificates have been issued, upon each adjust-
     ment of the number of Rights pursuant to this Section
     11(i), the Company shall, as promptly as practicable,
     cause to be distributed to holders of record of Rights
     Certificates on such record date Rights Certificates
     evidencing, subject to Section 14 hereof, the additional
     Rights to which such holders shall be entitled as a
     result of such adjustment or, at the option of the Compa-
     ny, shall cause to be distributed to such holders of
     record in substitution and replacement for the Rights
     Certificates held by such holders prior to the date of
     adjustment, and upon surrender thereof, if required by
     the Company, new Rights Certificates evidencing all the
     Rights to which such holders shall be entitled after such

                                    31
/38



     adjustment.  Rights Certificates so to be distributed
     shall be issued, executed and countersigned in the manner
     provided for herein (and may bear, at the option of the
     Company, the adjusted Purchase Price) and shall be regis-
     tered in the names of the holders of record of Rights
     Certificates on the record date specified in the public
     announcement.
     
                       (j)  Irrespective of any adjustment or
     change in the Purchase Price or the number of shares of
     Common Stock of the Company issuable upon the exercise of
     the Rights, the Rights Certificates theretofore and
     thereafter issued may continue to express the Purchase
     Price per share of Common Stock of the Company and the
     number of shares Common Stock of the Company which were
     expressed in the initial Rights Certificates issued
     hereunder.
     
                       (k)  Before taking any action that would
     cause an adjustment reducing the Purchase Price below the
     then stated value, if any, of the number of shares of
     Common Stock of the Company issuable upon exercise of the
     Rights, the Company shall use all reasonable efforts to
     take any corporate action which may, in the opinion of
     its counsel, be necessary in order that the Company may
     validly and legally issue, fully paid and nonassessable,
     such number of shares of Common Stock of the Company at
     such adjusted Purchase Price.
     
                       (l)  In any case in which this Section 11
     shall require that an adjustment in the Purchase Price be
     made effective as of a record date for a specified event,
     the Company may elect to defer until the occurrence of
     such event the issuance to the holder of any Right exer-
     cised after such record date of the number of shares of
     Common Stock of the Company or other capital stock or
     securities of the Company, if any, issuable upon such
     exercise over and above the number of shares of Common
     Stock of the Company or other capital stock or securities
     of the Company, if any, issuable upon such exercise on
     the basis of the Purchase Price in effect prior to such
     adjustment; provided, however, that the Company shall
     deliver to such holder a due bill or other appropriate
     instrument evidencing such holder's right to receive such
     additional shares (fractional or otherwise) or securities
     upon the occurrence of the event requiring such adjust-
     ment.

                                    32
/39


     

                       (m)  Anything in this Section 11 to the
     contrary notwithstanding, the Company shall be entitled
     to make such adjustments in the Purchase Price, in addi-
     tion to those adjustments expressly required by this
     Section 11, as and to the extent that in its good faith
     judgment the Board shall determine to be advisable in
     order that any (i) consolidation or subdivision of the
     Common Stock of the Company, (ii) issuance wholly for
     cash of any shares of Common Stock of the Company at less
     than the Current Market Price, (iii) issuance wholly for
     cash of shares of Common Stock of the Company or securi-
     ties which by their terms are convertible into or ex-
     changeable for shares of Common Stock of the Company,
     (iv) stock dividends or (v) issuance of rights, options
     or warrants referred to in this Section 11, hereafter
     made by the Company to holders of its Common Stock shall
     not be taxable to such stockholders.
     
                       (n)  The Company covenants and agrees that
     it shall not, at any time after the Distribution Date,
     (i) consolidate with any other Person (other than a
     Subsidiary of the Company in a transaction which complies
     with Section 11(o) hereof), (ii) merge with or into any
     other Person (other than a Subsidiary of the Company in a
     transaction which complies with Section 11(o) hereof) or
     (iii) sell or transfer (or permit any Subsidiary to sell
     or transfer), in one transaction or a series of related
     transactions, assets or earning power aggregating more
     than 50% of the assets or earning power of the Company
     and its Subsidiaries (taken as a whole) to any other
     Person or Persons (other than the Company or any of its
     Subsidiaries in one or more transactions each of which
     complies with Section 11(o) hereof) if (x) at the time of
     or immediately after such consolidation, merger, sale or
     transfer there are any rights, warrants or other instru-
     ments or securities outstanding or agreements in effect
     which would substantially diminish or otherwise eliminate
     the benefits intended to be afforded by the Rights or (y)
     prior to, simultaneously with or immediately after such
     consolidation, merger, sale or transfer, the stockholders
     of the Person who constitutes, or would constitute, the
     "Principal Party" for purposes of Section 13(a) hereof
     shall have received a distribution of Rights previously
     owned by such Person or any of its Affiliates and Associ-
     ates.

                                    33
/40


     

                       (o)  The Company covenants and agrees
     that, after the Distribution Date, it will not, except as
     permitted by Section 23 or Section 26 hereof, take (or
     permit any Subsidiary to take) any action if at the time
     such action is taken it is reasonably foreseeable that
     such action will diminish substantially or otherwise
     eliminate the benefits intended to be afforded by the
     Rights.
     
               Section 12.  Certificate of Adjusted Purchase
     Price or Number of Shares.  Whenever an adjustment is
     made as provided in Section 11 or Section 13 hereof, the
     Company shall (a) promptly prepare a certificate setting
     forth such adjustment and a brief statement of the facts
     accounting for such adjustment, (b) promptly file with
     the Rights Agent, and with each transfer agent for the
     Common Stock of the Company, a copy of such certificate
     and (c) mail a brief summary thereof to each record
     holder of a Rights Certificate (or, if prior to the
     Distribution Date, to each record holder of a certificate
     representing shares of Common Stock of the Company) in
     accordance with Section 24 hereof.  Notwithstanding the
     foregoing sentence, the failure of the Company to prepare
     such certificate or statement or make such filings or
     mailings shall not affect the validity of, or the force
     or effect of, the requirement for such adjustment.  The
     Rights Agent shall be fully protected in relying on any
     such certificate and on any adjustment therein contained
     and shall not be deemed to have knowledge of any such
     adjustment unless and until it shall have received such
     certificate.
     
               Section 13.  Consolidation, Merger or Sale or
     Transfer of Assets or Earning Power.
     
                       (a)  In the event (a "Section 13 Event")
     that, on or after the Stock Acquisition Date, directly or
     indirectly, (x) the Company shall consolidate or other-
     wise combine with, or merge with or into, any other
     Person or Persons (other than a Subsidiary of the Company
     in a transaction which complies with Section 11(o) here-
     of) and the Company shall not be the continuing or sur-
     viving corporation of such consolidation, combination or
     merger, (y) any Person or Persons (other than a Subsid-
     iary of the Company in a transaction which complies with
     Section 11(o) hereof) shall consolidate or otherwise
     combine with, or merge with or into, the Company and the
                                    34
/41




     Company shall be the continuing or surviving corporation
     of such consolidation, combination or merger and, in
     connection with such consolidation, combination or merg-
     er, all or part of the outstanding shares of Common Stock
     of the Company shall be changed into or exchanged for
     stock or other securities of any other Person or Persons
     or cash or any other property or (z) the Company shall
     sell or otherwise transfer (or one or more of its Subsid-
     iaries shall sell or otherwise transfer), in one transac-
     tion or a series of related transactions, assets or
     earning power aggregating more than 50% of the assets or
     earning power of the Company and its Subsidiaries (taken
     as a whole and calculated on the basis of the Company's
     most recent regularly prepared financial statements) to
     any Person or Persons (other than the Company or any
     Subsidiary of the Company in one or more transactions
     each of which complies with Section 11(o) hereof); pro-
     vided, however, that this clause (z) of Section 13(a)
     hereof shall not apply to the pro rata distribution by
     the Company of assets (including securities) of the
     Company or any of its Subsidiaries to all holders of
     Common Stock of the Company; then, and in each such case
     (except as may be contemplated by Section 13(d) hereof),
     proper provision shall be made so that:  (i) each holder
     of a Right, except as provided in Section 7(e) hereof,
     shall, on or after the later of (A) the date of the first
     occurrence of any such Section 13 Event or (B) the date
     of the expiration of the period within which the Rights
     may be redeemed pursuant to Section 23 hereof (as the
     same may be extended pursuant to Section 23(a) hereof or
     amended pursuant to Section 26 hereof), thereafter have
     the right to receive, upon the exercise thereof at the
     then current Purchase Price in accordance with the terms
     of this Agreement, such number of validly authorized and
     issued, fully paid, nonassessable and freely tradeable
     shares of Common Stock of the Principal Party, not sub-
     ject to any liens, encumbrances, rights of first refusal
     or other adverse claims, as shall be equal to the result
     obtained by (1) multiplying the then current Purchase
     Price by the number of shares of Common Stock of the
     Company for which a Right is exercisable immediately
     prior to the first occurrence of a Section 13 Event (or,
     if a Section 11(a)(ii) Event has occurred prior to the
     first occurrence of a Section 13 Event, multiplying the
     number of such shares of Common Stock of the Company for
     which a Right was exercisable immediately prior to the
     first occurrence of a Section 11(a)(ii) Event by the

                                    35
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     Purchase Price in effect immediately prior to such first
     occurrence), and (2) dividing that product (which, fol-
     lowing the first occurrence of a Section 13 Event, shall
     be referred to as the "Purchase Price" for each Right and
     for all purposes of this Agreement) by 50% of the Current
     Market Price per share of the Common Stock of such Prin-
     cipal Party on the date of consummation of such Section
     13 Event; (ii) the shares of Common Stock of such Princi-
     pal Party received by each holder of a Right upon exer-
     cise of that Right shall be fully paid and nonassessable;
     (iii) such Principal Party shall thereafter be liable
     for, and shall assume, by virtue of such Section 13
     Event, all the obligations and duties of the Company
     pursuant to this Agreement; (iv) the term "Company" shall
     thereafter be deemed to refer to such Principal Party, it
     being specifically intended that the provisions of Sec-
     tion 11 hereof shall apply only to such Principal Party
     following the first occurrence of a Section 13 Event; (v)
     such Principal Party shall take such steps (including
     without limitation the reservation of a sufficient number
     of shares of its Common Stock) in connection with the
     consummation of any such transaction as may be necessary
     to assure that the provisions hereof shall thereafter be
     applicable, as nearly as reasonably may be, in relation
     to its shares of Common Stock thereafter deliverable upon
     the exercise of the Rights; and (vi) the provisions of
     Section 11(a)(ii) hereof shall be of no effect following
     the first occurrence of any Section 13 Event.
     
                       (b)  "Principal Party" shall mean:
     
                           (i)  in the case of any transac-
               tion described in clause (x) or (y) of the
               first sentence of Section 13(a) hereof, (A) the
               Person that is the issuer of any securities
               into which shares of Common Stock of the Compa-
               ny are converted, changed or exchanged in such
               merger, consolidation or combination (or, if
               there is more than one such issuer, the issuer
               the Common Stock of which has the greatest
               market value) or (B) if no securities are so
               issued, the Person that is the other party to
               such merger (and survives the merger), consoli-
               dation or combination (or, if there is more
               than one such Person, the Person the Common
               Stock of which has the greatest market value),
               or if the other party to the merger does not

                                    36
/43



               survive the merger, the Person that does sur-
               vive the merger (including the Company, if it
               survives); and
     
                          (ii)  in the case of any transac-
               tion described in clause (z) of the first sen-
               tence of Section 13(a) hereof, the Person that
               is the party receiving the greatest portion of
               the assets or earning power transferred pursu-
               ant to such transaction or transactions or, if
               each Person that is a party to such transaction
               or transactions receives the same portion of
               the assets or earning power so transferred or
               if the Person receiving the greatest portion of
               the assets or earning power cannot be deter-
               mined, whichever of such Persons is the issuer
               of Common Stock having the greatest market
               value;
     
     provided, however, that in any such case, (1) if the
     Common Stock of such Person is not at such time and has
     not been continuously over the preceding 12-month period
     registered under Section 12 of the Exchange Act, and such
     Person is a direct or indirect Subsidiary of another
     Person the Common Stock of which is and has been so
     registered, "Principal Party" shall refer to such other
     Person; (2) if the Common Stock of such Person is not and
     has not been so registered and such Person is a Subsid-
     iary, directly or indirectly, of more than one Person,
     the Common Stocks of two or more of which are and have
     been so registered, "Principal Party" shall refer to
     whichever of such Persons is the issuer of the Common
     Stock having the greatest aggregate market value; and (3)
     if the Common Stock of such Person is not and has not
     been so registered and such Person is owned, directly or
     indirectly, by a joint venture formed by two or more
     Persons that are not owned, directly or indirectly, by
     the same Person, the rules set forth in (1) and (2) above
     shall apply to each of the chains of ownership having an
     interest in such joint venture as if such party were a
     Subsidiary of both or all of such joint venturers, and
     the Principal Parties in each such chain shall bear the
     obligations set forth in this Section 13 in the same
     ratio as their direct or indirect interests in such
     Person bear to the total of such interests.

                                    37
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                       (c)  The Company shall not consummate any
     Section 13 Event unless the Principal Party shall have a
     sufficient number of authorized shares of its Common
     Stock which have not been issued or reserved for issuance
     to permit the exercise in full of the Rights in accor-
     dance with this Section 13 and unless prior thereto the
     Company and such Principal Party shall have executed and
     delivered to the Rights Agent a supplemental agreement
     confirming that the requirements of Section 13(a) and
     Section 13(b) hereof shall promptly be performed in
     accordance with their terms and that such Section 13
     Event shall not result in a default by the Principal
     Party under this Agreement as the same shall have been
     assumed by the Principal Party pursuant to Section 13(a)
     and Section 13(b) hereof and further providing that, as
     soon as practicable after the date of any such Section 13
     Event, the Principal Party will:
     
                           (i)  prepare and file a regis-
               tration statement under the Act with respect to
               the Rights and the securities purchasable upon
               exercise of the Rights on an appropriate form,
               and will use its best efforts to cause such
               registration statement to (A) become effective
               as soon as practicable after such filing and
               (B) remain effective (with a prospectus at all
               times meeting the requirements of the Act)
               until the Expiration Date and to similarly
               comply with applicable state securities laws;
     
                          (ii)  use its best efforts to
               list or obtain quotation of (or continue the
               listing or quotation of) the Rights and the
               securities purchasable upon exercise of the
               Rights on a national securities exchange or by
               an automated quotation service;
     
                         (iii)  deliver to holders of the
               Rights historical financial statements for the
               Principal Party and each of its Affiliates
               which comply in all respects with the require-
               ments for registration on Form 10 (or any suc-
               cessor form) under the Exchange Act; and
     
                          (iv)  use its best efforts to
               obtain waivers of any rights of first refusal
               or preemptive rights in respect of the shares

                                    38
/45



               of Common Stock of the Principal Party subject
               to purchase upon exercise of outstanding
               Rights.
     
     The provisions of this Section 13 shall similarly apply
     to successive mergers, consolidations, combinations or
     sales or other transfers.  In the event that a Section 13
     Event shall occur at any time after the occurrence of a
     Section 11(a)(ii) Event, the Rights which have not there-
     tofore been exercised shall thereafter become exercisable
     in the manner described in Section 13(a) hereof.
     
                       (d)  Notwithstanding anything in this
     Agreement to the contrary, Section 13 hereof shall not be
     applicable to a transaction described in subparagraph (x)
     or subparagraph (y) of Section 13(a) hereof if (i) such
     transaction is consummated with a Person or Persons (or a
     wholly owned Subsidiary of any such Person or Persons)
     who acquired shares of Common Stock of the Company pursu-
     ant to a tender offer or exchange offer for all outstand-
     ing shares of Common Stock of the Company which complies
     with the exception provided for in Section 11(a)(ii)
     hereof, (ii) the price per share of Common Stock of the
     Company offered in such transaction is not less than the
     price per share of Common Stock of the Company paid to
     all holders of shares of Common Stock of the Company
     whose shares were purchased pursuant to such tender offer
     or exchange offer and (iii) the form of consideration
     being offered to the remaining holders of shares of
     Common Stock of the Company pursuant to such transaction
     is the same as the form of consideration paid pursuant to
     such tender offer or exchange offer.  Upon consummation
     of any such transaction contemplated by this Section
     13(d), all Rights hereunder shall expire.
     
               Section 14.  Fractional Rights and Fractional
     Shares.
     
                       (a)  The Company shall not be required to
     issue fractions of Rights, except prior to the Distribu-
     tion Date as provided in Section 11(i) hereof, or to dis-
     tribute Rights Certificates which evidence fractional
     Rights.  In lieu of any such fractional Rights, there
     shall be paid to the registered holders of the Rights
     Certificates with regard to which such fractional Rights
     would otherwise be issuable, an amount in cash equal to
     the same fraction of the current market value of a whole

                                    39
/46



     Right.  For purposes of this Section 14(a), the current
     market value of a whole Right shall be the closing price
     of the Rights for the Trading Day immediately prior to
     the date on which such fractional Rights would have been
     otherwise issuable.  The closing price of the Rights for
     any Trading Day shall be the last sale price, regular
     way, or, in case no such sale takes place on such day,
     the average of the closing bid and asked prices, regular
     way, in either case as reported in the principal consoli-
     dated transaction reporting system with respect to secu-
     rities listed or admitted to trading on the New York
     Stock Exchange or, if the Rights are not listed or admit-
     ted to trading on the New York Stock Exchange, as report-
     ed in the principal consolidated transaction reporting
     system or the Nasdaq National Market with respect to
     securities listed on another national securities exchange
     or quoted by the Nasdaq National Market, respectively, or
     if the Rights are not listed or admitted to trading on
     any national securities exchange or quoted by the Nasdaq
     National Market, the last quoted price or, if not so
     quoted, the average of the high bid and low asked prices
     in the over-the-counter market, as reported by The Nasdaq
     Stock Market or such other quotation system then in use
     or, if on any such date the Rights are not quoted by any
     such organization, the average of the closing bid and
     asked prices as furnished by a professional market maker
     making a market in the Rights selected by the Board.  If
     on any such date no such market maker is making a market
     in the Rights, the fair value of the Rights on such date
     as determined in good faith by the Board shall be used.
     
                       (b)  The Company shall not be required to
     issue fractions of shares of Common Stock of the Company
     upon exercise of the Rights or to distribute certificates
     which evidence fractional shares of Common Stock of the
     Company.  In lieu of fractional shares of Common Stock of
     the Company, the Company may pay to the registered hold-
     ers of Rights Certificates at the time such Rights are
     exercised as herein provided an amount in cash equal to
     the same fraction of the current market value of one
     share of Common Stock of the Company.  For purposes of
     this Section 14(b), the current market value of one share
     of Common Stock of the Company shall be the closing price
     of a share of Common Stock of the Company, or if unavail-
     able, the appropriate alternative price (in each case, as
     determined pursuant to Section 11(d) hereof) for the

                                    40
/47



     Trading Day immediately prior to the date of such exer-
     cise.
     
                       (c)  The holder of a Right by the accep-
     tance of that Right expressly waives such holder's right
     to receive any fractional Rights or any fractional shares
     upon exercise of a Right, except as permitted by this
     Section 14.
     
               Section 15.  Rights of Action.  All rights of
     action in respect of this Agreement, other than rights of
     action vested in the Rights Agent in Section 18 hereof,
     are vested in the respective registered holders of the
     Rights Certificates (and, prior to the Distribution Date,
     the registered holders of the Common Stock of the Compa-
     ny); and any registered holder of any Rights Certificate
     (or, prior to the Distribution Date, of the Common Stock
     of the Company), without the consent of the Rights Agent
     or of the holder of any other Rights Certificate (or,
     prior to the Distribution Date, of the Common Stock of
     the Company), may, in the holder's own behalf and for the
     holder's own benefit, enforce, and may institute and
     maintain any suit, action or proceeding against the
     Company to enforce, or otherwise act in respect of, the
     holder's right to exercise the Rights evidenced by such
     Rights Certificate in the manner provided in such Rights
     Certificate and in this Agreement.  Without limiting the
     foregoing or any remedies available to the holders of
     Rights, it is specifically acknowledged that the holders
     of Rights would not have an adequate remedy at law for
     any breach of this Agreement and shall be entitled to
     specific performance of the obligations hereunder and
     injunctive relief against actual or threatened violations
     of the obligations hereunder of any Person subject to
     this Agreement.
     
               Section 16.  Agreement of Rights Holders. 
     Every holder of a Right, by accepting the same, consents
     and agrees with the Company and the Rights Agent and with
     every other holder of a Right that:
     
                       (a)  prior to the Distribution Date, the
     Rights will be transferable only in connection with the
     transfer of shares of Common Stock of the Company;
     
                       (b)  after the Distribution Date, the
     Rights Certificates are transferable only on the registry

                                    41
/48



     books of the Rights Agent if surrendered at the principal
     office or offices of the Rights Agent designated for such
     purposes, duly endorsed or accompanied by a proper in-
     strument of transfer and with the appropriate forms and
     certificates contained therein duly executed;
     
                       (c)  subject to Section 6(a) and Section
     7(f) hereof, the Company and the Rights Agent may deem
     and treat the person in whose name a Rights Certificate
     (or, prior to the Distribution Date, the associated
     certificate for Common Stock of the Company) is regis-
     tered as the absolute owner thereof and of the Rights
     evidenced thereby (notwithstanding any notations of
     ownership or writing on the Rights Certificate or the
     associated certificate for Common Stock of the Company
     made by anyone other than the Company or the Rights
     Agent) for all purposes whatsoever, and neither the
     Company nor the Rights Agent, subject to the last sen-
     tence of Section 7(e) hereof, shall be required to be
     affected by any notice to the contrary; and
     
                       (d)  notwithstanding anything in this
     Agreement to the contrary, neither the Company nor the
     Rights Agent shall have any liability to any holder of a
     Right or other Person as a result of its inability to
     perform any of its obligations under this Agreement by
     reason of any preliminary or permanent injunction or
     other order, decree or ruling issued by a court of compe-
     tent jurisdiction or by a governmental, regulatory or
     administrative agency or commission, or by reason of any
     statute, rule, regulation or executive order promulgated
     or enacted by any governmental authority, prohibiting or
     otherwise restraining performance of such obligation;
     provided, however, that the Company must use its reason-
     able efforts to have any such order, decree or ruling
     lifted or otherwise overturned as soon as possible.
     
               Section 17.  Rights Certificate Holder Not
     Deemed a Stockholder.  No holder, as such, of any Rights
     Certificate shall be entitled to vote, receive dividends
     or be deemed for any purpose the holder of the number of
     shares of Common Stock of the Company or any other secu-
     rities of the Company which may at any time be issuable
     upon the exercise of the Rights represented thereby, nor
     shall anything contained herein or in any Rights Certifi-
     cate be construed to confer upon the holder of any Rights
     Certificate, as such, any of the rights of a stockholder

                                    42
/49



     of the Company or any right to vote for the election of
     directors or upon any matter submitted to stockholders at
     any meeting thereof, or to give or withhold consent to
     any corporate action, or to receive notice of meetings or
     other actions affecting stockholders (except as provided
     in Section 24 hereof), or to receive dividends or sub-
     scription rights, or otherwise, until the Right or Rights
     evidenced by such Rights Certificate shall have been
     exercised in accordance with the provisions hereof.
     
               Section 18.  Concerning the Rights Agent.
     
                       (a)  The Company agrees to pay to the
     Rights Agent reasonable compensation for all services
     rendered by it hereunder and, from time to time, on
     demand of the Rights Agent, reimbursement for its reason-
     able expenses and counsel fees and disbursements and
     other disbursements incurred in the administration and
     execution of this Agreement and the exercise and perfor-
     mance of its duties hereunder.  The Company also agrees
     to indemnify the Rights Agent for, and to hold it harm-
     less against, any loss, liability, or expense, incurred
     without negligence, bad faith or willful misconduct on
     the part of the Rights Agent, for anything done or omit-
     ted by the Rights Agent in connection with the acceptance
     and administration of this Agreement, including the costs
     and expenses of defending against any claim of liability
     in the premises. 
     
                       (b)  The Rights Agent shall be protected
     and shall incur no liability for or in respect of any
     action taken, suffered or omitted by it in good faith in
     connection with its administration of this Agreement in
     reliance upon any Rights Certificate or certificate for
     Common Stock of the Company or for other securities of
     the Company or upon any instrument of assignment or
     transfer, power of attorney, endorsement, affidavit,
     letter, notice, direction, consent, certificate, state-
     ment or other paper or document reasonably believed by it
     to be genuine and to be signed, executed and, where
     necessary, verified or acknowledged, by the proper Person
     or Persons.
                                    43
/50




     
               Section 19.  Merger or Consolidation or Change
     of Name of Rights Agent.
     
                       (a)  Any corporation into which the Rights
     Agent or any successor Rights Agent may be merged or with
     which it may be consolidated, or any corporation result-
     ing from any merger or consolidation to which the Rights
     Agent or any successor Rights Agent shall be a party, or
     any corporation succeeding to the corporate trust or
     stock transfer business of the Rights Agent or any suc-
     cessor Rights Agent, shall be the successor to the Rights
     Agent under this Agreement without the execution or
     filing of any paper or any further act on the part of any
     of the parties hereto; provided, however, that such
     corporation would be eligible for appointment as a suc-
     cessor Rights Agent under the provisions of Section 21
     hereof.  If at the time such successor Rights Agent shall
     succeed to the agency created by this Agreement, any of
     the Rights Certificates shall have been countersigned but
     not delivered, any such successor Rights Agent may adopt
     the countersignature of a predecessor Rights Agent and
     deliver such Rights Certificates so countersigned; and if
     at that time any of the Rights Certificates shall not
     have been countersigned, any successor Rights Agent may
     countersign such Rights Certificates either in the name
     of the predecessor or in the name of the successor Rights
     Agent; and in all such cases such Rights Certificates
     shall have the full force provided in the Rights Certifi-
     cates and in this Agreement.
     
                       (b)  If at any time the name of the Rights
     Agent shall be changed and at such time any of the Rights
     Certificates shall have been countersigned but not deliv-
     ered, the Rights Agent may adopt the countersignature
     under its prior name and deliver Rights Certificates so
     countersigned; and if at that time any of the Rights Cer-
     tificates shall not have been countersigned, the Rights
     Agent may countersign such Rights Certificates either in
     its prior name or in its changed name; and in all such
     cases such Rights Certificates shall have the full force
     provided in the Rights Certificates and in this Agree-
     ment.
     
               Section 20.  Duties of Rights Agent.  The
     Rights Agent undertakes the duties and obligations im-
     posed by this Agreement upon the following terms and
     conditions, by all of which the Company and the holders

                                    44
/51



     of Rights Certificates, by their acceptance thereof,
     shall be bound:
     
                       (a)  The Rights Agent may consult with
     legal counsel (who may be legal counsel for the Company),
     and the opinion of such counsel shall be full and com-
     plete authorization and protection to the Rights Agent as
     to any action taken or omitted by it in good faith and in
     accordance with such opinion.
     
                       (b)  Whenever in the performance of its
     duties under this Agreement the Rights Agent shall deem
     it necessary or desirable that any fact or matter (in-
     cluding without limitation the identity of any Acquiring
     Person and the determination of Current Market Price) be
     proved or established by the Company prior to taking or
     suffering any action hereunder, such fact or matter
     (unless other evidence in respect thereof be herein
     specifically prescribed) may be deemed to be conclusively
     proved and established by a certificate signed by the
     Chairman of the Board, the President, any Vice President,
     the Treasurer, any Assistant Treasurer, the Clerk or any
     Assistant Clerk of the Company and delivered to the
     Rights Agent; and such certificate shall be full authori-
     zation to the Rights Agent for any action taken or suf-
     fered in good faith by it under the provisions of this
     Agreement in reliance upon such certificate.
     
                       (c)  The Rights Agent shall be liable
     hereunder only for its own negligence, bad faith or
     willful misconduct.
     
                       (d)  The Rights Agent shall not be liable
     for or by reason of any of the statements of fact or
     recitals contained in this Agreement or in the Rights
     Certificates, nor shall it be required to verify the same
     (except as to its countersignature on such Rights Certif-
     icates), but all such statements and recitals are and
     shall be deemed to have been made by the Company only.
     
                       (e)  The Rights Agent shall not be under
     any responsibility in respect of the validity of this
     Agreement or the execution and delivery hereof (except
     the due execution hereof by the Rights Agent) or in
     respect of the validity or execution of any Rights Cer-
     tificate (except its countersignature thereon); nor shall
     it be responsible for any breach by the Company of any

                                    45
/52



     covenant or condition contained in this Agreement or in
     any Rights Certificate; nor shall it be responsible for
     any adjustment required under the provisions of Section
     11 or Section 13 hereof or responsible for the manner,
     method or amount of any such adjustment or the ascertain-
     ing of the existence of facts that would require any such
     adjustment (except with respect to the exercise of Rights
     evidenced by Rights Certificates after receipt of a
     certificate describing any such adjustment); nor shall it
     by any act hereunder be deemed to make any representation
     or warranty as to the authorization or reservation of any
     shares of Common Stock of the Company to be issued pursu-
     ant to this Agreement or any Rights Certificate or as to
     whether any shares of Common Stock of the Company will,
     when so issued, be validly authorized and issued, fully
     paid and nonassessable.
     
                       (f)  The Company agrees that it will
     perform, execute, acknowledge and deliver or cause to be
     performed, executed, acknowledged and delivered all such
     further and other acts, instruments and assurances as may
     reasonably be required by the Rights Agent for the carry-
     ing out or performing by the Rights Agent of the provi-
     sions of this Agreement.
     
                       (g)  The Rights Agent is hereby authorized
     and directed to accept instructions with respect to the
     performance of its duties hereunder from the Chairman of
     the Board, the President, any Vice President, the Trea-
     surer, any Assistant Treasurer, the Clerk or any Assis-
     tant Clerk of the Company and to apply to such officers
     for advice or instructions in connection with its duties,
     and it shall not be liable for any action taken or suf-
     fered to be taken by it in good faith in accordance with
     instructions of any such officer.  Any application by the
     Rights Agent for written instructions from the Company 
     may, at the option of the Rights Agent, set forth in
     writing any action proposed to be taken by, or omission
     of, the Rights Agent under this Agreement and the date on
     or after which such action shall be taken or such omis-
     sion shall be effective.  The Rights Agent shall not be
     liable for any action taken by, or omission of, the
     Rights Agent in accordance with a proposal included in
     any such application on or after the date specified in
     such application (which date shall not be less than five
     Business Days after the date the Company actually re-
     ceives such application, unless the Company shall have

                                    46
/53



     consented in writing to an earlier date) unless, prior to
     taking any such action (or prior to the effective date in
     the case of an omission), the Rights Agent shall have
     received written instructions in response to such appli-
     cation specifying the action to be taken or omitted.
     
                       (h)  The Rights Agent and any stockholder,
     director, officer or employee of the Rights Agent may
     buy, sell or deal in any of the Rights or other securi-
     ties of the Company, become pecuniarily interested in any
     transaction in which the Company may be interested,
     contract with or lend money to the Company or otherwise
     act as fully and freely as though the Rights Agent were
     not Rights Agent under this Agreement.  Nothing herein
     shall preclude the Rights Agent from acting in any other
     capacity for the Company or for any other legal entity.
     
                       (i)  The Rights Agent may execute and
     exercise any of the rights or powers hereby vested in it
     or perform any duty hereunder either itself or by or
     through its attorneys or agents, and the Rights Agent
     shall not be answerable or accountable for any act,
     default, neglect or misconduct of any such attorneys or
     agents or for any loss to the Company resulting from any
     such act, default, neglect or misconduct; provided,
     however, reasonable care was exercised in the selection
     and continued employment thereof.
     
                       (j)  No provision of this Agreement shall
     require the Rights Agent to expend or risk its own funds
     or otherwise incur any financial liability in the perfor-
     mance of any of its duties hereunder (other than internal
     costs incurred by the Rights Agent in providing services
     to the Company in the ordinary course of its business as
     Rights Agent) or in the exercise of its rights if there
     shall be reasonable grounds for believing that repayment
     of such funds or adequate indemnification against such
     risk or liability is not reasonably assured to it.
     
                       (k)  If, with respect to any Rights Cer-
     tificate surrendered to the Rights Agent for exercise or
     transfer, the certificate contained in the form of as-
     signment or form of election to purchase, as the case may
     be, has either not been completed or indicates an affir-
     mative response to clause 1 or clause 2 thereof, the
     Rights Agent shall not take any further action with

                                    47
/54



     respect to such requested exercise or transfer without
     first consulting with the Company.
     
               Section 21.  Change of Rights Agent.  The
     Rights Agent or any successor Rights Agent may resign and
     be discharged from its duties under this Agreement upon
     30 days' notice in writing mailed to the Company and to
     each transfer agent of the Common Stock of the Company by
     registered or certified mail and to the holders of the
     Rights Certificates, if any, by first-class mail.  The
     Company may remove the Rights Agent or any successor
     Rights Agent upon 30 days' notice in writing mailed to
     the Rights Agent or successor Rights Agent, as the case
     may be, and to each transfer agent of the Common Stock of
     the Company by registered or certified mail and to the
     holders of the Rights Certificates, if any, by first-
     class mail.  If the Rights Agent shall resign or be
     removed or shall otherwise become incapable of acting,
     the Company shall appoint a successor to the Rights
     Agent.  If the Company shall fail to make such appoint-
     ment within a period of 30 days after giving notice of
     such removal or after it has been notified in writing of
     such resignation or incapacity by the resigning or inca-
     pacitated Rights Agent or by the holder of a Rights
     Certificate (who shall, with such notice, submit his
     Rights Certificate for inspection by the Company), then
     any registered holder of any Rights Certificate may apply
     to any court of competent jurisdiction for the appoint-
     ment of a new Rights Agent.  If no successor Rights Agent
     shall have been appointed within 30 days from the effec-
     tiveness of such removal, resignation or incapacity and
     no registered holder of any Rights Certificate has ap-
     plied pursuant to this Agreement for the appointment of a
     new Rights Agent, the Company automatically shall be
     designated as successor Rights Agent.  Any successor
     Rights Agent appointed by the Company or by such a court
     shall be (a) a corporation organized and doing business
     under the laws of the United States or of any state of
     the United States, in good standing, which is authorized
     to do business as a banking institution in such state, is
     authorized under such laws to exercise corporate trust
     powers, is subject to supervision or examination by
     federal or state authority and has at the time of its
     appointment as Rights Agent a combined capital and sur-
     plus of at least $100,000,000 or (b) an Affiliate of a
     corporation described in clause (a) of this sentence. 
     After appointment, the successor Rights Agent shall be

                                    48
/55



     vested with the same powers, rights, duties and responsi-
     bilities as if it had been originally named as Rights
     Agent without further act or deed; but the predecessor
     Rights Agent shall deliver and transfer to the successor
     Rights Agent any property at the time held by it hereun-
     der and shall execute and deliver, if applicable, any
     further assurance, conveyance, act or deed necessary for
     that purpose.  Not later than the effective date of any
     such appointment, the Company shall file notice thereof
     in writing with the predecessor Rights Agent and each
     transfer agent of the Common Stock of the Company, and
     shall mail a notice thereof in writing to the registered
     holders of the Rights Certificates.  Failure to give any
     notice provided for in this Section 21, however, or any
     defect therein, shall not affect the legality or validity
     of the resignation or removal of the Rights Agent or the
     appointment of the successor Rights Agent, as the case
     may be.
     
               Section 22.  Issuance of New Rights Certifi-
     cates.  Notwithstanding any of the provisions of this
     Agreement or of the Rights Certificates to the contrary,
     the Company may, at its option, issue new Rights Certifi-
     cates evidencing Rights in such form as may be approved
     by the Board to reflect any adjustment or change in the
     Purchase Price and the number or kind or class of shares
     or other securities or property purchasable under the
     Rights Certificates made in accordance with the provi-
     sions of this Agreement.  In addition, in connection with
     the issuance or sale of shares of Common Stock of the
     Company following the Distribution Date and prior to the
     redemption or expiration of the Rights, the Company (a)
     shall, with respect to shares of Common Stock of the
     Company so issued or sold pursuant to the exercise of
     stock options or under any employee plan or arrangement
     or upon the exercise, conversion or exchange of securi-
     ties hereafter issued by the Company, and (b) may, in any
     other case, if deemed necessary or appropriate by the
     Board, issue Rights Certificates representing the appro-
     priate number of Rights in connection with such issuance
     or sale; provided, however, that (i) no such Rights Cer-
     tificate shall be issued if and to the extent that the
     Company shall be advised by counsel that such issuance
     would create a significant risk of material adverse tax
     consequences to the Company or the Person to whom such
     Rights Certificate would be issued and (ii) no such
     Rights Certificate shall be issued if and to the extent

                                    49
/56




     that appropriate adjustment shall otherwise have been
     made in lieu of the issuance thereof.
     
               Section 23.  Redemption and Termination.
     
                       (a)  The Board may, at its option, at any
     time prior to the earlier of (i) the Close of Business on
     the tenth Business Day (or such specified or unspecified
     later date as may be determined by the Board before the
     Rights cease being redeemable) following the Stock Acqui-
     sition Date (or, if the Stock Acquisition Date shall have
     occurred prior to the Record Date, the Close of Business
     on the tenth Business Day following the Record Date) or
     (ii) the Final Expiration Date, direct the Company to,
     and if directed, the Company shall, redeem all but not
     less than all of the then outstanding Rights at a redemp-
     tion price of $.01 per Right, as such amount may be
     appropriately adjusted to reflect any stock split, stock
     dividend or similar transaction occurring after the date
     hereof (such redemption price being hereinafter referred
     to as the "Redemption Price").  The Company may, at its
     option, pay the Redemption Price in shares of Common
     Stock of the Company (based on the Current Market Price
     of the Common Stock of the Company at the time of redemp-
     tion), cash or any other form of consideration deemed
     appropriate by the Board.  Notwithstanding anything con-
     tained in this Agreement to the contrary, the Rights
     shall not be exercisable after the first occurrence of a
     Section 11(a)(ii) Event until such time as the Company's
     right of redemption hereunder has expired.
     
                       (b)  Immediately upon the action of the
     Board directing the Company to make the redemption of the
     Rights, evidence of which shall have been filed with the
     Rights Agent, and without any further action and without
     any notice, the right to exercise the Rights will termi-
     nate, and the only right thereafter of the holders of
     Rights shall be to receive the Redemption Price for each
     Right so held.  Promptly after the action of the Board
     directing the Company to make the redemption of the
     Rights, the Company shall give notice of such redemption
     to the Rights Agent and the holders of the then outstand-
     ing Rights by mailing such notice to each record holder
     of the Common Stock of the Company at the address of such
     holder shown on the records of the Company.  Any notice
     which is mailed in the manner herein provided shall be
     deemed given, whether or not the holder receives the

                                    50
/57



     notice.  Each such notice of redemption will state the
     method by which the payment of the Redemption Price will
     be made.
     
               Section 24.  Notice of Certain Events.
     
                       (a)  In case the Company shall propose, at
     any time after the Distribution Date, (i) to pay any
     dividend payable in stock of any class to the holders of
     Common Stock of the Company or to make any other distri-
     bution to the holders of Common Stock of the Company
     (other than a regular periodic cash dividend out of
     earnings or retained earnings of the Company), (ii) to
     offer to the holders of Common Stock of the Company
     rights or warrants to subscribe for or to purchase any
     additional shares of Common Stock of the Company or
     shares of stock of any class or any other securities,
     rights or options, (iii) to effect any reclassification
     of the Common Stock of the Company (other than a reclas-
     sification involving only the subdivision or split of
     outstanding shares of Common Stock of the Company), (iv)
     to effect any consolidation, combination or merger into
     or with any other Person or Persons (other than a Sub-
     sidiary of the Company in a transaction which complies
     with Section 11(o) hereof), or to effect any sale or
     other transfer (or to permit one or more of its Subsid-
     iaries to effect any sale or other transfer), in one
     transaction or a series of related transactions, of more
     than 50% of the assets or earning power of the Company
     and its Subsidiaries (taken as a whole) to any other
     Person or Persons (other than the Company or any of its
     Subsidiaries in one or more transactions each of which
     complies with Section 11(o) hereof) or (v) to effect the
     liquidation, dissolution or winding up of the Company,
     then, in each such case, the Company shall give to each
     holder of a Rights Certificate, to the extent feasible
     and in accordance with Section 25 hereof, a notice of
     such proposed action, which shall specify the record date
     for the purposes of such stock dividend, distribution of
     rights or warrants, or the date on which such reclassifi-
     cation, consolidation, combination, merger, sale, trans-
     fer, liquidation, dissolution or winding up is to take
     place and the date of participation therein by the hold-
     ers of the shares of Common Stock of the Company, if any
     such date is to be fixed, and such notice shall be so
     given in the case of any action covered by clause (i) or
     (ii) above at least 20 days prior to the record date for

                                    51
/58



     determining holders of the shares of Common Stock of the
     Company for purposes of such action, and in the case of
     any such other action, at least 20 days prior to the date
     of the taking of such proposed action or the date of
     participation therein by the holders of the shares of
     Common Stock of the Company, whichever shall be the
     earlier.  
     
                       (b)  In case any Section 11(a)(ii) Event
     shall occur, then, in any such case, (i) the Company
     shall as soon as practicable thereafter give to each
     holder of a Rights Certificate, to the extent feasible in
     accordance with Section 25 hereof, a notice of the occur-
     rence of such event, which shall specify the event and
     the consequences of the event to holders of Rights under
     Section 11(a)(ii) hereof, and (ii) all references in the
     preceding paragraph to Common Stock of the Company shall
     be deemed thereafter to, if appropriate, other securi-
     ties.
     
               Section 25.  Notices.  Notices or demands
     authorized by this Agreement to be given or made by the
     Rights Agent or by the holder of any Rights Certificate
     to or on the Company shall be sufficiently given or made
     if sent by first-class mail, postage prepaid, addressed
     (until another address is filed in writing with the
     Rights Agent) as follows:
     
               Ionics, Incorporated
               65 Grove Street
               Watertown, Massachusetts 02172-2882
               Attention:  Corporate Clerk
     
     Subject to the provisions of Section 21 hereof, any
     notice or demand authorized by this Agreement to be given
     or made by the Company or by the holder of any Rights
     Certificate to or on the Rights Agent shall be suffi-
     ciently given or made if sent by first-class mail, post-
     age prepaid, addressed (until another address is filed in
     writing with the Company) as follows:
     
               BankBoston, N.A.
               c/o Boston EquiServe Limited Partnership
               150 Royall Street
               Canton, Massachusetts 02021
               Attention: Shareholder Services Division

                                    52
/59


     
     Notices or demands authorized by this Agreement to be
     given or made by the Company or the Rights Agent to the
     holder of any Rights Certificate (or, if prior to the
     Distribution Date, to the holder of any certificate
     representing shares of Common Stock of the Company) shall
     be sufficiently given or made if sent by first-class
     mail, insured, postage prepaid, addressed to such holder
     at the address of such holder as shown on the registry
     books of the Company.
     
               Section 26.  Supplements and Amendments.  Prior
     to the Distribution Date, the Company and the Rights
     Agent shall, if the Board so directs, supplement or amend
     any provision of this Agreement without the approval of
     any holders of certificates representing shares of Common
     Stock of the Company.  From and after the Distribution
     Date, the Company and the Rights Agent shall, if the
     Board so directs, supplement or amend this Agreement
     without the approval of any holders of Rights Certifi-
     cates in order (i) to cure any ambiguity, (ii) to correct
     or supplement any provision contained herein which may be
     defective or inconsistent with any other provisions
     herein, (iii) to shorten or lengthen any time period
     hereunder or (iv) to change or supplement the provisions
     hereunder in any manner which the Company may deem neces-
     sary or desirable and which shall not adversely affect
     the interests of the holders of Rights Certificates
     (other than an Acquiring Person or an Affiliate or Asso-
     ciate of an Acquiring Person); provided, that this Agree-
     ment may not be supplemented or amended to lengthen,
     pursuant to clause (iii) of this sentence, (A) a time
     period relating to when the Rights may be redeemed or to
     modify the ability (or inability) of the Board to redeem
     the Rights, in either case at such time as the Rights are
     not then redeemable or (B) any other time period unless
     such lengthening is for the purpose of protecting, en-
     hancing or clarifying the rights of, or the benefits to,
     the holders of Rights (other than an Acquiring Person or
     an Affiliate or Associate of an Acquiring Person).  Upon
     the delivery of a certificate from an appropriate officer
     of the Company which states that the proposed supplement
     or amendment is in compliance with the terms of this
     Section 26, the Rights Agent shall execute such supple-
     ment or amendment.  Prior to the Distribution Date, the
     interests of the holders of Rights shall be deemed coin-
     cident with the interests of the holders of Common Stock
     of the Company.

                                    53
/60



     
               Section 27.  Successors.  All the covenants and
     provisions of this Agreement by or for the benefit of the
     Company or the Rights Agent shall bind and inure to the
     benefit of their respective successors and assigns here-
     under.
     
               Section 28.  Determinations and Actions by the
     Board, etc.  For all purposes of this Agreement, any
     calculation of the number of shares of Common Stock of
     the Company outstanding at any particular time, including
     for purposes of determining the particular percentage of
     such outstanding shares of Common Stock of the Company of
     which any Person is the Beneficial Owner, shall be made
     in accordance with the last sentence of Rule
     13d 3(d)(1)(i) of the General Rules and Regulations under
     the Exchange Act.  The Board shall have the exclusive
     power and authority to administer this Agreement and to
     exercise all rights and powers specifically granted to
     the Board or to the Company, or as may be necessary or
     advisable in the administration of this Agreement, in-
     cluding without limitation the right and power to (a)
     interpret the provisions of this Agreement and (b) make
     all determinations deemed necessary or advisable for the
     administration of this Agreement (including without
     limitation a determination to redeem or not redeem the
     Rights or to amend this Agreement).  All such actions,
     calculations, interpretations and determinations (includ-
     ing without limitation for purposes of clause (y) below,
     all omissions with respect to the foregoing) which are
     done or made by the Board, the Outside Directors or the
     Company in good faith, shall (x) be final, conclusive and
     binding on the Company, the Rights Agent, the holders of
     the Rights and all other parties and (y) not subject the
     Board or the Outside Directors to any liability to the
     holders of the Rights.
     
               Section 29.  Benefits of this Agreement. 
     Nothing in this Agreement shall be construed to give to
     any Person other than the Company, the Rights Agent and
     the registered holders of the Rights Certificates (and,
     prior to the Distribution Date, registered holders of the
     Common Stock of the Company) any legal or equitable
     right, remedy or claim under this Agreement; but this
     Agreement shall be for the sole and exclusive benefit of
     the Company, the Rights Agent and the registered holders

                                    54
/61



     of the Rights Certificates (and, prior to the Distribu-
     tion Date, registered holders of the Common Stock of the
     Company).
     
               Section 30.  Severability.  If any term, provi-
     sion, covenant or restriction of this Agreement is held
     by a court of competent jurisdiction or other authority
     to be invalid, void or unenforceable, the remainder of
     the terms, provisions, covenants and restrictions of this
     Agreement shall remain in full force and effect and shall
     in no way be affected, impaired or invalidated; provided,
     however, that notwithstanding anything in this Agreement
     to the contrary, if any such term, provision, covenant or
     restriction is held by such court or authority to be
     invalid, void or unenforceable and the Board determines
     in its good faith judgment that severing the invalid lan-
     guage from this Agreement would adversely affect the
     purpose or effect of this Agreement, the right of redemp-
     tion set forth in Section 23 hereof shall be reinstated
     and shall not expire until the Close of Business on the
     tenth Business Day following the date of such determina-
     tion by the Board.  Without limiting the foregoing, if
     any provision of this Agreement requiring that a determi-
     nation be made by the Board or by the Outside Directors
     is held by a court of competent jurisdiction or other au-
     thority to be invalid, void or unenforceable, such deter-
     mination shall then be made by the Board in accordance
     with applicable law and the articles of organization and
     by-laws of the Company, each as then in effect.
     
               Section 31.  Governing Law.  This Agreement,
     each Right and each Rights Certificate issued hereunder
     shall be deemed to be a contract under seal made under
     the laws of the Commonwealth of Massachusetts, and for
     all purposes this Agreement shall be governed by and con-
     strued in accordance with the laws of the Commonwealth of
     Massachusetts applicable to contracts made and to be
     performed entirely within the Commonwealth of Massachu-
     setts.
     
               Section 32.  Counterparts.  This Agreement may
     be executed in any number of counterparts, and each of
     such counterparts shall for all purposes be deemed to be
     an original, and all such counterparts shall together
     constitute but one and the same instrument.

                                    55
/62



     
               Section 33.  Descriptive Headings.  Descriptive
     headings of the several Sections of this Agreement are
     inserted for convenience only and shall not control or
     affect the meaning or construction of any of the provi-
     sions hereof.










































                                    56
/63          



          IN WITNESS WHEREOF, the parties hereto have
     caused this Agreement to be duly executed and their
     respective corporate seals to be hereunto affixed and
     attested, all as of the day and year first above written.
     
     
     
     ATTEST:                       IONICS, INCORPORATED
     
     
     
     By /s/Stephen Korn            By /s/Arthur L. Goldstein   
        Name: Stephen Korn            Name:  Arthur L. Goldstein
        Title: Clerk                  Title: Chairman and 
                                             Chief Executive Officer
     
     
     Attest:                       BANKBOSTON, N.A., as Rights Agent
     
     
     
     By /s/Brian P. Frechette      By /s/Maragaret Prentice  
        Name:  Brian P. Frechette     Name:  Margaret Prentice
        Title: Account Manager        Title: Administration Manager
     
     





















                                      57
/64          




                                                        Exhibit A
                                                                  
                             
                   [Form of Rights Certificate]
     
     
     Certificate No. R-                         ______ Rights
     
     NOT EXERCISABLE AFTER AUGUST 19, 2007, SUBJECT TO EARLI-
     ER REDEMPTION OR EXPIRATION PURSUANT TO THE RENEWED
     RIGHTS AGREEMENT.  THE RIGHTS ARE SUBJECT TO REDEMPTION,
     AT THE OPTION OF THE COMPANY, AT $.01 PER RIGHT ON THE
     TERMS SET FORTH IN THE RENEWED RIGHTS AGREEMENT.  THE
     RIGHTS EVIDENCED BY THIS CERTIFICATE SHALL NOT BE EXER-
     CISABLE, AND SHALL BE VOID SO LONG AS HELD, BY A HOLDER
     IN ANY JURISDICTION WHERE THE REQUISITE QUALIFICATION
     FOR THE ISSUANCE TO SUCH HOLDER, OR THE EXERCISE BY SUCH
     HOLDER, OF THE RIGHTS IN SUCH JURISDICTION SHALL NOT
     HAVE BEEN OBTAINED OR BE OBTAINABLE.  UNDER CERTAIN CIR-
     CUMSTANCES, RIGHTS BENEFICIALLY OWNED BY AN ACQUIRING
     PERSON OR AN AFFILIATE OR ASSOCIATE OF ANY SUCH PERSON
     (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT) AND
     ANY SUBSEQUENT HOLDER OF SUCH RIGHTS MAY BECOME NULL AND
     VOID.  [THE RIGHTS REPRESENTED BY THIS RIGHTS CERTIFI-
     CATE ARE OR WERE BENEFICIALLY OWNED BY A PERSON WHO WAS
     OR BECAME AN ACQUIRING PERSON OR AN AFFILIATE OR ASSO-
     CIATE OF AN ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED
     IN THE RENEWED RIGHTS AGREEMENT).  ACCORDINGLY, THIS
     RIGHTS CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY MAY
     BECOME NULL AND VOID IN THE CIRCUMSTANCES SPECIFIED IN
     SECTION 7(e) OF SUCH AGREEMENT.]*

                 
*    The portion of the legend in brackets shall be
     inserted only if applicable and shall replace the
     preceding sentence.          











/65




     
                        Rights Certificate
     
                       IONICS, INCORPORATED
     
               This certifies that                      , or
     registered assigns, is the registered owner of the num-
     ber of Rights set forth above, each of which entitles
     the owner thereof, subject to the terms, provisions and
     conditions of the Renewed Rights Agreement dated as of
     August 19, 1997, as amended, restated, renewed or ex-
     tended from time to time (the "Rights Agreement"), be-
     tween Ionics, Incorporated, a Massachusetts corporation
     (the "Company"), and BankBoston, N.A., a national bank-
     ing association (the "Rights Agent"), to purchase from
     the Company at any time prior to 5:00 P.M. (Boston,
     Massachusetts time) on August 19, 2007, at the office or
     offices of the Rights Agent, or its successors as Rights
     Agent, designated for such purpose, one fully paid,
     nonassessable share of common stock, par value $1.00 per
     share, of the Company (the "Common Stock"), at a pur-
     chase price of $175 per share (the "Purchase Price"),
     upon presentation and surrender of this Rights Certifi-
     cate with the Form of Election to Purchase and included
     Certificate duly completed and executed.  The number of
     Rights evidenced by this Rights Certificate (and the




















                                      A-2
/66



     number of shares of Common Stock which may be purchased
     upon exercise thereof) set forth above, and the Purchase
     Price set forth above, are the number and Purchase Price
     as of              ,     , based on the Common Stock as
     constituted at such date.  The Company reserves the
     right to require prior to the occurrence of a Triggering
     Event (as such term is defined in the Rights Agreement)
     that a number of Rights be exercised so that only whole
     shares of Common Stock will be issued.
               As more fully set forth in the Rights Agree-
     ment, from and after the first occurrence of a Section
     11(a)(ii) Event (as such term is defined in the Rights
     Agreement), if the Rights evidenced by this Rights Cer-
     tificate are beneficially owned by (i) an Acquiring
     Person or an Associate or Affiliate of an Acquiring Per-
     son (as such terms are defined in the Rights Agreement),
     which is determined to have been involved in or caused
     or facilitated, directly or indirectly, such Section
     11(a)(ii) Event, (ii) a transferee of such Acquiring
     Person (or of any such Associate or Affiliate) or
     (iii) under certain circumstances specified in the
     Rights Agreement, a transferee of such Acquiring Person
     (or of any such Associate or Affiliate who becomes a
     transferee prior to or concurrently with such Acquiring
























                                      A-3
/67



     Person becoming such, such Rights shall become null and
     void without any further action, and no holder hereof
     shall have any right with respect to such Rights whether
     under the Rights Agreement or otherwise.
               As provided in the Rights Agreement, the Pur-
     chase Price and the number and kind of shares of Common
     Stock or other securities, which may be purchased upon
     the exercise of the Rights evidenced by this Rights
     Certificate are subject to modification and adjustment
     upon the happening of certain events, including Trigger-
     ing Events (as defined in the Rights Agreement).
               This Rights Certificate is subject to all of
     the terms, provisions and conditions of the Rights
     Agreement, which terms, provisions and conditions are
     hereby incorporated herein by reference and made a part
     hereof and to which Rights Agreement reference is hereby
     made for a full description of the rights, limitations
     of rights, obligations, duties and immunities hereunder
     of the Rights Agent, the Company and the holders of the
     Rights Certificates, which limitations of rights include
     the temporary suspension of the exercisability of such
     Rights under the specific circumstances set forth in the
     Rights Agreement.  Reference is also made to the Rights
     Agreement for definitions of capitalized terms used and
























                                      A-4
/68



     not defined herein.  Copies of the Rights Agreement are
     on file at the above-mentioned office of the Rights
     Agent and are also available upon written request to the
     Rights Agent.
               This Rights Certificate, with or without other
     Rights Certificates upon surrender at the office or of-
     fices of the Rights Agent designated for such purpose,
     may be exchanged for another Rights Certificate or
     Rights Certificates of like tenor and date evidencing
     Rights entitling the holder to purchase a like aggregate
     number of shares of Common Stock as the Rights evidenced
     by the Rights Certificate or Rights Certificates surren-
     dered shall have entitled such holder to purchase.  If
     this Rights Certificate shall be exercised in part, the
     holder shall be entitled to receive upon surrender here-
     of another Rights Certificate or Rights Certificates for
     the number of whole Rights not exercised.
               Subject to the provisions of the Rights Agree-
     ment, the Rights evidenced by this Certificate may be
     redeemed by the Company at its option at a redemption
     price of $.01 per Right at any time prior to the earlier
     of (i) the Close of Business on the tenth Business Day
     following the Stock Acquisition Date (as such time peri-
     od may be extended pursuant to the Rights Agreement) and
























                                      A-5
/69



     (ii) the Final Expiration Date (as defined in the Rights
     Agreement).
               If the Company so determines, no fractional
     shares of Common Stock will be issued upon the exercise
     of any Right or Rights evidenced hereby (other than
     fractions which are integral multiples of one share of
     Common Stock (which may, at the election of the Company,
     be evidenced by depository receipts), but in lieu there-
     of, a cash payment will be made, as provided in the
     Rights Agreement.
               No holder of this Rights Certificate, as such,
     shall be entitled to vote or receive dividends or be
     deemed for any purpose the holder of shares of Common
     Stock or of any other securities of the Company which
     may at any time be issuable on the exercise hereof, nor
     shall anything contained in the Rights Agreement or
     herein be construed to confer upon the holder hereof, as
     such, any of the rights of a stockholder of the Company
     or any right to vote for the election of directors or
     upon any matter submitted to stockholders at any meeting
     thereof, or to give or withhold consent to any corporate
     action, or, to receive notice of meetings or other ac-
     tions affecting stockholders (except as provided in the
     Rights Agreement), or to receive dividend or subscrip-
























                                      A-6
/70



     tion rights, or otherwise, until the Right or Rights
     evidenced by this Rights Certificate shall have been
     exercised as provided in the Rights Agreement.
               This Rights Certificate shall not be valid or
     obligatory for any purpose until it shall have been
     countersigned by the Rights Agent.










































                                      A-7
/71          



          WITNESS the facsimile signature of the proper
     officers of the Company and its corporate seal.
     
     Dated as of              ,     
     
     
     ATTEST:                       IONICS, INCORPORATED
     
     
     
     By                            By                        
        Secretary                     Title:
     
     
     Countersigned:
     
     BANKBOSTON, N.A.
     
     
     
     By                           
          Authorized Signature

























                                      A-8
/72          



           [Form of Reverse Side of Rights Certificate]
     
     
                            ASSIGNMENT
     
         (To be executed by the registered holder if such
        holder desires to transfer the Rights Certificate.)
     
     
     FOR VALUE RECEIVED                                           

     hereby sells, assigns and transfers unto                     

                                                                  

           (Please print name and address of transferee)
                                                                  

     this Rights Certificate, together with all right, title
     and interest herein, and does hereby irrevocably consti-
     tute and appoint               Attorney, to transfer the
     within Rights Certificate on the books of the within-
     named Company, with full power of substitution.
     
     Dated:               ,           
     
     
     

                                                             
                                   Signature
     
     
     Signature Guaranteed:














/73          


                            Certificate
     
               The undersigned hereby certifies by checking
     the appropriate boxes that:
     
               (1)     this Rights Certificate   is   is not
     being sold, assigned and transferred by or on behalf of
     a Person who is or was an Acquiring Person or an Affili-
     ate or Associate of any such Acquiring Person (as such
     terms are defined in the Rights Agreement);
     
               (2)     after due inquiry and to the best knowl-
     edge of the undersigned, the undersigned   did   did not
     acquire the Rights evidenced by this Rights Certificate
     from any Person who is, was or subsequently became an
     Acquiring Person or an Affiliate or Associate of an
     Acquiring Person.
     
     Dated:             ,                                   
                                   Signature
     
     
     Signature Guaranteed:
     
     
                              NOTICE
     
               The signatures to the foregoing Assignment and
     Certificate must correspond to the name as written upon
     the face of this Rights Certificate in every particular,
     without alteration or enlargement or any change whatso-
     ever.















/74
          


                       ELECTION TO PURCHASE
     
               (To be executed if holder desires to
                exercise Rights represented by the
                       Rights Certificate.)
     
     
     To IONICS, INCORPORATED:
     
               The undersigned hereby irrevocably elects to
     exercise        Rights represented by this Rights Certif-
     icate to purchase the shares of Common Stock issuable
     upon the exercise of the Rights (or such other securi-
     ties of the Company or of any other Person which may be
     issuable or such other assets which may be deliverable
     upon the exercise of the Rights) and requests that cer-
     tificates for any such shares or securities be issued in
     the name of and delivered to:
 
                                                               
                  (Please print name and address)
                                                               
     
     Please insert social security
     or other identifying number:                              

               If such number of Rights shall not be all the
     Rights evidenced by this Rights Certificate, a new
     Rights Certificate for the balance of such Rights shall
     be registered in the name of and delivered to:

                                                               
                  (Please print name and address) 
                                                               

                                                               
     
     Please insert social security
     or other identifying number:                              

     Dated:             ,        


                                                               
                                   Signature

     Signature Guaranteed:

/75              



                            Certificate
     
               The undersigned hereby certifies by checking
     the appropriate boxes that:
     
               (1)  the Rights evidenced by this Rights Cer-
     tificate   are   are not being exercised by or on behalf
     of a Person who is or was an Acquiring Person or an Af-
     filiate or Associate of any such Acquiring Person (as
     such terms are defined in the Rights Agreement); and
     
               (2)  after due inquiry and to the best knowl-
     edge of the undersigned, the undersigned   did   did not
     acquire the Rights evidenced by this Rights Certificate
     from any Person who is, was or became an Acquiring Per-
     son or an Affiliate or Associate of an Acquiring Person.
     
     
     Dated:             ,                                      
                                   Signature
     
     Signature Guaranteed:
     
     
                              NOTICE
     
               The signature to the foregoing Election to
     Purchase and Certificate must correspond to the name as
     written upon the face of this Rights Certificate in
     every particular, without alteration or enlargement or
     any change whatsoever.
     
     















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