IONICS INC
SC 13D/A, 1996-08-20
SPECIAL INDUSTRY MACHINERY, NEC
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934

                               (Amendment No. 2)*


                              IONICS, INCORPORATED
                                (Name of Issuer)

                          Common Stock, Par Value $1.00
                         (Title of Class of Securities)

                                   462218-10-8
                                 (CUSIP Number)

                           Gordon H. Hayes, Esq., Jr.
                           Testa, Hurwitz & Thibeault
        Exchange Place, 53 State Street, Boston, MA 02109 (617) 248-7000
            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                                  June 13, 1996
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [  ]


Check the following box if a fee is being paid with the statement [ ]. (A fee is
not required only if the reporting person:  (1) has a previous statement on file
reporting  beneficial  ownership  of more  than  five  percent  of the  class of
securities  described  in Item 1;  and (2) has  filed  no  amendment  subsequent
thereto reporting  beneficial  ownership of five percent or less of such class.)
(See Rule 13d-7.)

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule  13d-1(a) for other  parties to whom copies are to be
sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).


CUSIP No. 462218-10-8                                  13D

- ------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Savena Trust
- ------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) [   ]

                                                             (b) [ X ]

- ------------------------------------------------------------------------------
3.    SEC USE ONLY

- ------------------------------------------------------------------------------
4.    SOURCE OF FUNDS*
      BK
- ------------------------------------------------------------------------------
5.    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                         [   ]    
- ------------------------------------------------------------------------------
6.    CITIZENSHIP OF PLACE OF ORGANIZATION
      Liechtenstein
- ------------------------------------------------------------------------------
                   7.  SOLE VOTING POWER
                       524,000

 NUMBER OF         ___________________________________________________________
  SHARES           8.  SHARED VOTING POWER
BENEFICIALLY           -0-
 OWNED BY
   EACH            ___________________________________________________________
 REPORTING         9.  SOLE DISPOSITIVE POWER
  PERSON               524,000
   WITH
                   -----------------------------------------------------------
                  10.  SHARED DISPOSITIVE POWER
                       -0-

- ------------------------------------------------------------------------------
11.   AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH  REPORTING  PERSON  894,926
      (includes 3,500 shares subject to presently exercisable options and 10,000
      shares held by another Reporting Person,  341,926 shares held in trust for
      the  benefit of another  Reporting  Person  and  12,000  shares  held in a
      fiduciary capacity for such other Reporting Person)

- ------------------------------------------------------------------------------
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                 [   ]
- ------------------------------------------------------------------------------
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      5.98%
- ------------------------------------------------------------------------------
14.   TYPE OF REPORTING PERSON*
      00 - Trust
- ------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!
          INCLUDES BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.






CUSIP No. 462218-10-8                                  13D

- ------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Philora Trust
- ------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) [   ]

                                                             (b) [ X ]

- ------------------------------------------------------------------------------
3.    SEC USE ONLY

- ------------------------------------------------------------------------------
4.    SOURCE OF FUNDS*
      PF
- ------------------------------------------------------------------------------
5.    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                         [   ]
- ------------------------------------------------------------------------------
6.    CITIZENSHIP OF PLACE OF ORGANIZATION
      Liechtenstein
- ------------------------------------------------------------------------------
                   7.   SOLE VOTING POWER
                        341,926

 NUMBER OF         ___________________________________________________________
  SHARES           8.   SHARED VOTING POWER
BENEFICIALLY            -0-
 OWNED BY
   EACH            ___________________________________________________________
 REPORTING         9.   SOLE DISPOSITIVE POWER
  PERSON                341,926
   WITH
                   -----------------------------------------------------------
                  10.   SHARED DISPOSITIVE POWER
                        -0-

- ------------------------------------------------------------------------------
11.   AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH  REPORTING  PERSON  894,926
      (includes 3,500 shares subject to presently exercisable options and 10,000
      shares held by another Reporting Person,  524,000 shares held in trust for
      the  benefit of another  Reporting  Person  and  12,000  shares  held in a
      fiduciary capacity for another Reporting Person)

- ------------------------------------------------------------------------------
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                 [   ]
- ------------------------------------------------------------------------------
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      5.98%
- ------------------------------------------------------------------------------
14.   TYPE OF REPORTING PERSON*
      00 - Trust
- ------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!
          INCLUDES BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.






CUSIP No. 462218-10-8                                  13D

- ------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Markus W. Stadlin, Trustee of Savena Trust and Philora Trust
- ------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) [   ]

                                                             (b) [ X ]

- ------------------------------------------------------------------------------
3.    SEC USE ONLY

- ------------------------------------------------------------------------------
4.    SOURCE OF FUNDS*
      00
- ------------------------------------------------------------------------------
5.    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                         [   ]
- ------------------------------------------------------------------------------
6.    CITIZENSHIP OF PLACE OF ORGANIZATION
      Switzerland
- ------------------------------------------------------------------------------
                   7.   SOLE VOTING POWER
                        -0-

 NUMBER OF         ___________________________________________________________
  SHARES           8. SHARED VOTING POWER
BENEFICIALLY          524,000 (shared with the other trustees of Savena Trust)
 OWNED BY             341,926 (shared with the other trustees of Philora Trust)
   EACH            ___________________________________________________________
 REPORTING         9.   SOLE DISPOSITIVE POWER
  PERSON                -0-
   WITH
                   -----------------------------------------------------------
                  10. SHARED DISPOSITIVE POWER
                      524,000  (shared with the other  trustees of Savena Trust)
                      341,926 (shared with the other trustees of Philora Trust)
- ------------------------------------------------------------------------------
11.   AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH  REPORTING  PERSON  894,926
      (includes 3,500 shares subject to presently exercisable options and 10,000
      shares  held by  another  Reporting  Person and  12,000  shares  held in a
      fiduciary capacity for another Reporting Person)

- ------------------------------------------------------------------------------
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                 [   ]
- ------------------------------------------------------------------------------
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      5.98%
- ------------------------------------------------------------------------------
14.   TYPE OF REPORTING PERSON*
      00 -  Trustee
- ------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!
          INCLUDES BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.






CUSIP No. 462218-10-8                                  13D

- ------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Interfiducia Trust Reg., Trustee of Savena Trust and Philora Trust
- ------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) [   ]
                                                             
                                                             (b) [ X ]

- ------------------------------------------------------------------------------
3.    SEC USE ONLY

- ------------------------------------------------------------------------------
4.    SOURCE OF FUNDS*
      00
- ------------------------------------------------------------------------------
5.    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                         [   ]
- ------------------------------------------------------------------------------
6.    CITIZENSHIP OF PLACE OF ORGANIZATION
      Liechtenstein
- ------------------------------------------------------------------------------
                   7.   SOLE VOTING POWER
                        -0-

 NUMBER OF         ___________________________________________________________
  SHARES           8.SHARED VOTING POWER
BENEFICIALLY         524,000 (shared with the other trustees of Savena Trust)
 OWNED BY            341,926 (shares with the other trustees of Philora Trust)
   EACH            ___________________________________________________________
 REPORTING         9.   SOLE DISPOSITIVE POWER
  PERSON                -0-
   WITH
                   -----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                      524,000  (shared with the other  trustees of Savena Trust)
                      341,926 (shared with the other trustees of Philora Trust)
- ------------------------------------------------------------------------------
11.  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY EACH  REPORTING  PERSON  894,926
     (includes 3,500 shares subject to presently  exercisable options and 10,000
     shares  held by  another  Reporting  Person  and  12,000  shares  held in a
     fiduciary capacity for such other Reporting Person)

- ------------------------------------------------------------------------------
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                 [   ]
- ------------------------------------------------------------------------------
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      5.98%
- ------------------------------------------------------------------------------
14.   TYPE OF REPORTING PERSON*
      00 - Trustee
- ------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!
          INCLUDES BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.







CUSIP No. 462218-10-8                                  13D

- ------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Alex Fischer, Trustee of Savena Trust and Philora Trust
- -------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) [   ]

                                                             (b) [ X ]

- ------------------------------------------------------------------------------
3.    SEC USE ONLY

- ------------------------------------------------------------------------------
4.    SOURCE OF FUNDS*
      00
- ------------------------------------------------------------------------------
5.    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                         [   ]
- ------------------------------------------------------------------------------
6.    CITIZENSHIP OF PLACE OF ORGANIZATION
      Switzerland
- ------------------------------------------------------------------------------
                   7.   SOLE VOTING POWER
                        -0-

 NUMBER OF             _______________________________________________________
  SHARES           8. SHARED VOTING POWER
BENEFICIALLY          524,000 (shared with the other trustees of Savena Trust)
 OWNED BY             341,926 (shared wit the other trustees of Philora Trust)
   EACH            ___________________________________________________________
 REPORTING         9. SOLE DISPOSITIVE POWER
  PERSON              -0-
   WITH
                   -----------------------------------------------------------
                  10. SHARED DISPOSITIVE POWER
                      524,000  (shared with the other  trustees of Savena Trust)
                      341,926 (shared with the other trustees of Philora Trust)
- ------------------------------------------------------------------------------
11.   AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH  REPORTING  PERSON  894,926
      (includes 3,500 shares subject to presently exercisable options and 10,000
      shares  held by  another  Reporting  Person and  12,000  shares  held in a
      fiduciary capacity for another Reporting Person)
- ------------------------------------------------------------------------------
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                 [   ]
- ------------------------------------------------------------------------------
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      5.98%
- ------------------------------------------------------------------------------
14.   TYPE OF REPORTING PERSON*
      00 - Trustee
- ------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!
          INCLUDES BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.







CUSIP No. 462218-10-8                                  13D

- ------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Arnaud de Vitry d'Avaucourt
- ------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) [   ]

                                                             (b) [ X ]
- ------------------------------------------------------------------------------
3.    SEC USE ONLY

- ------------------------------------------------------------------------------
4.    SOURCE OF FUNDS*
      00
- ------------------------------------------------------------------------------
5.    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                         [   ]
- ------------------------------------------------------------------------------
6.    CITIZENSHIP OF PLACE OF ORGANIZATION
      France
- ------------------------------------------------------------------------------
                   7.   SOLE VOTING POWER
                        13,500 (includes 3,500 shares subject to presently
                        exercisable options)
 NUMBER OF         ___________________________________________________________
  SHARES           8.   SHARED VOTING POWER
BENEFICIALLY            -0-
 OWNED BY
   EACH            ___________________________________________________________
 REPORTING         9.   SOLE DISPOSITIVE POWER
  PERSON                13,500 (includes 3,500 shares subject to presently
   WITH                 exercisable options)
                   -----------------------------------------------------------
                  10.   SHARED DISPOSITIVE POWER
                        12,000

- ------------------------------------------------------------------------------
11.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  894,926
      (includes 524,000 shares held in trust for the benefit of this Reporting
      Person, 341,926 shares held in trust for the benefit of another Reporting
      Person and 12,000 shares held in fiduciary capacity for such other
      Reporting Person)
- ------------------------------------------------------------------------------
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                 [   ]
- ------------------------------------------------------------------------------
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      5.98%
- ------------------------------------------------------------------------------
14.   TYPE OF REPORTING PERSON*
      IN
- ------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!
          INCLUDES BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.







CUSIP No. 462218-10-8                                  13D

- ------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Henriette de Vitry d'Avaucourt
- -------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) [   ]

                                                             (b) [ X ]

- ------------------------------------------------------------------------------
3.    SEC USE ONLY

- ------------------------------------------------------------------------------
4.    SOURCE OF FUNDS*
      PF
- ------------------------------------------------------------------------------
5.    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                         [   ]
- ------------------------------------------------------------------------------
6.    CITIZENSHIP OF PLACE OF ORGANIZATION
      France
- ------------------------------------------------------------------------------
                   7.   SOLE VOTING POWER
                        12,000

 NUMBER OF         ___________________________________________________________
  SHARES           8.   SHARED VOTING POWER
BENEFICIALLY            -0-
 OWNED BY
   EACH            ___________________________________________________________
 REPORTING         9.   SOLE DISPOSITIVE POWER
  PERSON                -0-
   WITH
                   -----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        12,000

- ------------------------------------------------------------------------------
11.   AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH  REPORTING  PERSON  894,926
      (includes 3,500 shares subject to presently exercisable options and 10,000
      shares held by another Reporting Person,  341,926 shares held in trust for
      the benefit of this Reporting  Person and 524,000 shares held in trust for
      the benefit of another Reporting Person)
- ------------------------------------------------------------------------------
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                 [   ]
- ------------------------------------------------------------------------------
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      5.98%
- ------------------------------------------------------------------------------
14.   TYPE OF REPORTING PERSON*
      IN
- ------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!
          INCLUDES BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.







     This  Amendment No. 2 ("Amendment  No. 2") is being filed by (i) the Savena
Trust, a trust organized under the laws of  Liechtenstein  (the "Savena Trust"),
whose trustees are Dr. Markus W. Stadlin  ("Stadlin"),  Alex Fischer ("Fischer")
and the  Interfiducia  Trust Reg.  ("Interfiducia");  (ii) the Philora  Trust, a
trust organized under the laws of  Liechtenstein  (the "Philora  Trust"),  whose
trustees  are  Stadlin,   Fischer  and  Interfiducia;   (iii)  Arnaud  de  Vitry
d'Avaucourt  ("Mr. de Vitry");  (iv) Henriette de Vitry  d'Avaucourt  ("Mrs.  de
Vitry");  (v)  Stadlin;  (vi)  Fischer;  and  (vii)  Interfiducia  (all  of  the
foregoing,  collectively,  the "Reporting Persons").  Amendment No. 2 amends and
supplements  the  Statement on Schedule 13D (the  "Statement")  dated August 15,
1988,  relating  to the Common  Stock,  par value  $1.00 per share (the  "Common
Stock"), of Ionics,  Incorporated,  a Massachusetts corporation (the "Company"),
which  has its  principal  executive  offices  at 65  Grove  Street,  Watertown,
Massachusetts 02172. All terms used herein,  unless otherwise defined,  have the
same meaning herein as in the Statement.

         This  filing is being  made to  disclose  the sale of an  aggregate  of
138,000 shares of the Company's  Common Stock by the Savena Trust;  the transfer
by gift by Mrs. de Vitry of an aggregate of 150,000  shares and the  replacement
of Dr. Alfred Bietenholz as trustee by Stadlin.  In addition,  all share amounts
have been restated to reflect a 2-for-1  stock split by way of a stock  dividend
distributed on January 6, 1995.

        Item 1.   Security and Issuer.

        Common  Stock,  $1.00 par value per  share of  Ionics,  Incorporated,  a
Massachusetts  corporation.  The  address of the  issuer's  principal  executive
office is 65 Grove Street, Watertown, MA 02172.

        Item 2.   Identity and Background.

 I.          a)   Savena Trust.

             b)   8 Elizabethen Strasse,
                  4010, Basel, Switzerland, CH

             c)   The Savena Trust is a trust created under the laws
                  of Liechtenstein, the principal indirect
                  beneficiary of which is Arnaud de Vitry
                  d'Avaucourt.  Both Mr. and Mrs. de Vitry
                  d'Avaucourt disclaim beneficial ownership of the 524,000
                  shares held by the Savena Trust.

             d)   Criminal proceedings -- not applicable.

             e)   Civil proceedings -- not applicable.

             f)   Place of Organization -- Liechtenstein.


II.          a)   Philora Trust.

             b)   8 Elizabethen Strasse,
                  4010, Basel, Switzerland, CH

             c)   The Philora Trust is a trust created under the laws
                  of Liechtenstein, the principal indirect
                  beneficiary of which is Henriette de Vitry
                  d'Avaucourt.  Both Mr. and Mrs. de Vitry
                  d'Avaucourt disclaim beneficial ownership of the
                  341,926 shares held by the Philora Trust.

             d)   Criminal proceedings -- not applicable.

             e)   Civil proceedings -- not applicable.

             f)   Place of Organization -- Liechtenstein.

III.     The present individual trustees of both the Savena Trust
         and the Philora Trust are as follows:

        1.   a)   Dr. Markus Stadlin

             b)   8 Elizabethen Strasse,
                  4010, Basel, Switzerland, CH

             c)   Self-employed attorney practicing in Basel,
                  Switzerland at the business address listed at III
                  (1)(b) above.

              d)  Criminal proceedings -- none.

              e)  Civil proceedings -- none.

              f)  Citizenship -- Switzerland.

        2.    a)  Interfiducia Trust Reg.

              b)  Post Office Box 344
                  FL-9490 Vaduz, Liechtenstein

              c)  The Interfiducia Trust Reg. is a trust created
                  under the laws of Liechtenstein.

              d)  Criminal proceedings -- none.

              e)  Civil proceedings -- none.

              f)  Citizenship -- Liechtenstein.

        3.    a)  Alex Fischer

              b)  8 Elizabethen Strasse,
                  4010, Basel, Switzerland, CH

              c)  Self-employed attorney practicing in Basel,
                  Switzerland at the business address listed at (b)
                  above.

              d)  Criminal proceedings -- none.

              e)  Civil proceedings -- none.

              f)  Citizenship -- Switzerland.

 IV.          a)  Arnaud de Vitry d'Avaucourt

              b)  41, Rue de l'Universite, 75007, Paris, France.

              c)  Mr. de Vitry d'Avaucourt is Chairman of the Board,
                  Eureka (SICAV) Paris, a French investment firm.
                  Mr. de Vitry d'Avaucourt's address is 41, Rue de
                  l'Universite, 75007, Paris, France.

              d)  Criminal proceedings -- none.

              e)  Civil proceedings -- none.

              f)  Citizenship -- France.

  V.          a)  Henriette de Vitry d'Avaucourt

              b)  41, Rue de l'Universite, 75007, Paris, France.

              c)  Mrs. de Vitry d'Avaucourt is engaged in the
                  practice of psychoanalysis.  Mrs. de Vitry
                  d'Avaucourt's address is 41, Rue de l'Universite,
                  75007, Paris, France.

              d)  Criminal proceedings -- none.

              e)  Civil proceedings -- none.

              f)  Citizenship -- France.

        Item 3.   Source and Amount of Funds or Other Considerations.

        This  Amendment  No. 2 is being filed in order to disclose a decrease in
the  ownership  of shares of  Common  Stock of the  Company  by  certain  of the
Reporting Persons as a net result of the following transactions: (i) the sale by
the Savena Trust of 138,000  shares;  (ii) the transfer by gift by Mrs. de Vitry
of 150,000 shares; and (iii) the grant and vesting and/or exercise of options to
purchase of 13,500  additional  shares,  of which  3,500  shares are  subject to
presently exercisable stock options held by Mr. de Vitry.

        Item 5.   Interest in Securities of the Issuer.

        As of June 13,  1996,  the  Reporting  Persons  making  this  filing may
collectively  be deemed to  beneficially  own (as that term is  defined  in Rule
13d-3  under the Act),  894,926  shares of Common  Stock of the  Company,  which
represents  approximately 5.98% of the outstanding shares of Common Stock of the
Company  based on a total of  14,962,085  shares of the  Company's  Common Stock
outstanding as of March 31, 1996, as disclosed by the Company.

        Under the Savena Trust instrument, the trustees of the Savena Trust have
sole power to vote or direct the vote of all  524,000  shares held by the Savena
Trust and sole power to dispose or direct the  disposition  of all such  shares.
Each individual  trustee listed in Item 2 may be deemed to share power with each
other such trustee (i) to vote or direct the vote of all 524,000  shares held by
the  Savena  Trust and (ii) to dispose  or direct  the  disposition  of all such
shares.  Accordingly,   Mr.  and  Mrs.  de  Vitry  each  individually  disclaims
beneficial ownership of all shares held by the Savena Trust.

        Under the Philora  Trust  instrument,  the trustees of the Philora Trust
have sole power to vote or direct  the vote of all  341,926  shares  held by the
Philora  Trust and sole power to dispose or direct the  disposition  of all such
shares. The individual  trustees of such trust may be deemed to share power with
each other such  trustee  (i) to vote or direct the vote of all  341,926  shares
held by the trust and (ii) to  dispose  or direct  the  disposition  of all such
shares.  Accordingly,   Mr.  and  Mrs.  de  Vitry  each  individually  disclaims
beneficial ownership of all shares held by the Philora Trust.

        Since the individual  trustees of the Savena Trust and the Philora Trust
are the same persons or entities, each such trustee may be deemed to share power
with the  other  trustee  (i) to vote or  direct  the vote of the  aggregate  of
865,926  shares  held by the  Savena  Trust  and the  Philora  Trust and (ii) to
dispose or direct the disposition of all such shares.

        Mr.  de Vitry may be deemed to  beneficially  own  22,000  shares of the
Company's  Common  Stock.  Such shares  represent  less than 1% of the Company's
outstanding shares, based on 14,962,085 shares outstanding as of March 31, 1996.
Mr. de Vitry may be  deemed  to have sole  power to vote or direct  the vote and
sole power to dispose or direct the disposition of 10,000 shares held by him and
3,500 such shares subject to presently  exercisable options. He also shares with
his wife the power to dispose or direct the disposition of the remaining  12,000
shares held by a French financial  institution in a fiduciary  capacity for Mrs.
de Vitry, and accordingly may be deemed to beneficially own such 12,000 shares.

        Mrs. de Vitry may be deemed to beneficially own the 12,000 shares of the
Company's  Common Stock held by a French  financial  institution  in a fiduciary
capacity  for her over which she shares  dispositive  power with her husband and
has sole voting power.  Such shares  represent  less than 1% of the  outstanding
shares.

        On June 13,  1996,  Mrs. de Vitry  transferred  by gift an  aggregate of
150,000 shares.

        Item 7.   Material to be Filed as
                  Exhibits to Amendment No. 2.

           *Exhibit 1. Agreement regarding filing of a joint Schedule 13D.

           *Exhibit 2. Stock  Purchase  Agreement  dated as of August 5, 1988 by
                   and between Ionics, Incorporated and the Savena Trust.

           *Exhibit 3. Letter  Agreement  dated  August 8,  1988 by and  between
                   Ionics, Incorporated and the Philora Trust.

           *Exhibit 4. Stock Purchase  Agreement dated as of May 18, 1988 by and
                   between Ionics, Incorporated and the Philora Trust.

           *Exhibit 5. Letter Agreement and General Pledge  Agreement each dated
                   August 10,  1988 by and between  Bank  Dreyfus & Sons and the
                   Savena Trust  (original in the German  language  with English
                   translation provided).

           *Exhibit 6. Power of attorney  conferring certain authority on Alfred
                   Bietenholz on behalf of Interfiducia Trust Reg., a trustee of
                   Savena Trust  (original in the German  language  with English
                   translation provided).

           *Exhibit 7. Powers  of  attorney   conferring  certain  authority  on
                   Richard J. Testa,  Gordon H. Hayes, Jr., Caesar J. Belbel and
                   Alfred Bietenholz.

           **Exhibit 8. Agreement regarding filing of a joint Schedule 13D.

           **Exhibit 9. Power of attorney  conferring  certain authority on Alex
                   Fischer on behalf of  Interfiducia  Trust Reg.,  a trustee of
                   Savena and Philora Trusts.

           **Exhibit 10.  Powers of attorney  conferring  certain  authority  on
                   Richard J. Testa, Gordon H. Hayes, Jr., Mitchell S. Bloom and
                   Alex Fischer.
          
          ***Exhibit 11. Agreement regarding filing or a joint schedule 13D

          ***Exhibit 12. Power of Attorney by  Markus Stadlin conferring certain
                   authority on Richard J. Testa, Gordon H. Hayes, Jr., Mitchell
                   S. Bloom and Alex Fischer 
- ----------------------
  * Incorporated by reference from Schedule 13D dated August 15, 1988.

 ** Incorporated  by reference  from Amendment No. 1 to this Schedule 13D, dated
    June 22, 1994.

*** Filed herewith.





                                   SIGNATURES

           After reasonable inquiry and to the best of our knowledge and belief,
we certify that the  information  set forth in this Statement is true,  complete
and correct.


                                                   The Savena Trust


/s/Henriette de Vitry d'Avaucourt                  By:/s/Alex Fischer
Henriette de Vitry d'Avaucourt                     Trustee
- ------------------------------                     -------


                                                   The Philora Trust


/s/Arnaud de Vitry d'Avaucourt                     By:/s/Alex Fischer
- ------------------------------                     ------------------
Arnaud de Vitry d'Avaucourt                        Trustee


                                                   The INTERFIDUCIA Trust Reg.
                                                   (a Trustee of both the
                                                   Savena Trust and the Philora
                                                   Trust)

                                                   By:/s/Alex Fischer
                                                   ------------------
                                                   Alex Fischer
                                                   Attorney-in-Fact


                                                   By:/s/Markus Stadlin
                                                   -----------------------
                                                   Markus Stadlin,
                                                   a Trustee of both the
                                                   Savena Trust and the
                                                   Philora Trust


                                                   By:/s/Alex Fischer
                                                   ------------------
                                                   Alex Fischer,
                                                   a Trustee of both the
                                                   Savena Trust and the
                                                   Philora Trust

Dated: June 13, 1996

         

                                                                      EXHIBIT 11





                                    AGREEMENT

         Pursuant to Rule 13d-1(f)  under the  Securities  Exchange Act of 1934,
the undersigned hereby agree that only one statement  containing the information
required by Schedule 13D need be filed with respect to the current  ownership of
any of the undersigned of shares of Common Stock of Ionics,  Incorporated or any
purchase of additional stock or sales of such stock of the Company by and of the
undersigned.



                                              The Savena Trust

/S/ Henriette de Vitry d'Avaucourt
- ------------------------------------          By:  /s/ Alex Fischer
Henriette de Vitry d'Avaucourt                    ----------------------------
                                                  Trustee

                                              The Philora Trust

/s/ Arnaud de Vitry d'Avaucourt
- -----------------------------------           By:  /s/ Alex Fischer
Arnaud de Vitry d'Avaucourt                       ----------------------------
                                                  Trustee


                                              The INTERFIDUCIA Trust Reg.
                                             (a Trustee of both the Savena Trust
                                              and the Philora Trust)

                                              By:  /s/ Alex Fischer
                                                  ----------------------------
                                                   Attorney-In-Fact


                                              /s/ Markus W. Stadlin
                                              --------------------------------
                                              Markus W. Stadlin,
                                             (a Trustee of both the Savena Trust
                                              and the Philora Trust)

                                              /s/ Alex Fischer
                                              --------------------------------
                                              Alex Fischer,
                                             (a Trustee of both the Savena Trust
                                              and the Philora Trust)







                                                                      EXHIBIT 12

                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears
below hereby  constitutes and appoints  Richard J. Testa,  Gordon H Hayes,  Jr.,
Mitchell  S. Bloom and Alex  Fischer his true and lawful  attorneys-in  fact and
agents, with full power of substitution and  resubstitution,  for him and in his
name, place and stead, in any and all capabilities (until revoked in writing) to
sign any and all instruments, certificates, amendments and documents required to
be executed on behalf of himself  pursuant to Section 13(d) and Section 13(g) of
the Securities  Exchange Act of 1934, as amended (the "Exchange  Act"),  and any
and all  regulations  promulgated  thereunder,  and to file the  same,  with all
exhibits  thereto,  and any other  documents in connection  therewith,  with the
Securities and Exchange  Commission,  and with any other entity when and if such
is mandated by the Exchange Act, granting unto said attorneys-in-fact and agents
full  power  and  authority  to do and  perform  each and  every  act and  thing
requisite and  necessary  fully to all intents and purposes as he might or could
do in person thereby  ratifying and  confirming all that said  attorneys-in-fact
and agents,  or his  substitute or  substitutes,  may lawfully do or cause to be
done by virtue hereof.

         IN WITNESS  WHEREOF,  this Power of Attorney  has been signed as of the
19th day of August, 1996.


                                                 /s/ Markus W. Stadlin
                                                 ------------------------------
                                                 Markus W. Stadlin, a  Trustee
                                                 of both the Savena Trust
                                                 and the Philora Trust








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