<PAGE>
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C.
SCHEDULE 13G
(under the Securities Exchange Act of 1934)
(Amendment No. )*
Gelman Sciences Inc.
-------------------------
(Name of Issuer)
Common Stock $0.10 Par Value
----------------------------
(Title of Class of Securities)
368514105
---------------
(Cusip Number)
Check the following box if a fee is being paid with this statement [ X ] . (A
fee is not required only if the filing 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 more than five percent or less of such
class.) (See Rule 13d-7.)
* The remainder of this cover page shall be filled out for a reporting person's
initial filing of 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.)
[Continued on the following page(s)]
Page 1 of 4 pages
<PAGE>
CUSIP NO. 368514105 Page 2 of 4 Pages
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
SCHRODER WERTHEIM INVESTMENT SERVICES INC.
13-2697273
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
DELAWARE
- --------------------------------------------------------------------------------
NUMBER OF 5 SOLE VOTING POWER
SHARES 411,600
----------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY ----
----------------------------------------------------------------
EACH 7 SOLE DISPOSITIVE POWER
REPORTING 411,600
----------------------------------------------------------------
PERSON 8 SHARED DISPOSITIVE POWER
WITH -----
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
411,600
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.26%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IA
- --------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
Cusip # 368514105 Page 3 of 4 Pages
SCHEDULE 13G
ITEM 1 (a): NAME OF ISSUER:
Gelman Sciences Inc.
ITEM 2 (b): ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES;
Gelman Sciences Inc.
600 South Wagner Road
P. O. Box 1448
Ann Arbor, MI 48106
ITEM 2 (a): NAME OF PERSON FILING:
See Item 1 of the Cover Page attached hereto
ITEM 2 (b): ADDRESS OF PRINCIPAL BUSINESS OFFICE:
787 Seventh Avenue -34th Floor
New York, NY 10019
ITEM 2 (c): CITIZENSHIP:
See Item 4 of Cover Page attached hereto
ITEM 2 (d): TITLE OF CLASS OF SECURITIES:
See Cover Page attached hereto
ITEM 2 (e): CUSIP NUMBER:
See Cover Page attached hereto
ITEM 3: TYPE OF REPORTING PERSON:
See Item 12 of Cover Page attached hereto
ITEM 4: OWNERSHIP:
(a) See Item 9 of the Cover Page attached hereto
(b) PERCENT OF CLASS: See Item 11 of the Cover Page attached hereto
(c) For information on voting and dispositive power with respect to
the above listed shares, see Items 5 - 8 of the Cover Page attached
hereto.
<PAGE>
Cusip # 368514105 Page 4 of 4 Pages
SCHEDULE 13G
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:
Not Applicable
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:
Not Applicable
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
COMPANY:
Not Applicable
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:
Not Applicable
ITEM 9. NOTICE OF DISSOLUTION OF GROUP:
Not Applicable
ITEM 10. CERTIFICATION:
By signing below, I certify that, to the best of my knowledge
and belief, the securities referred to above were acquired in the
ordinary course of business and were not acquired for the purpose
of and do not have the effect of changing or influencing the
control of the issuer of such securities and were not acquired in
connection with or as a participant in any transaction having
such purpose or effect.
SIGNATURE:
After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this
statement is true, complete, and correct.
Date: February 9, 1996 By: Schroder Wertheim Investment
Services Inc..
Signature:
--------------------------
Name/Title: E. William Smethurst /
President