SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
________________
SCHEDULE 13G/A
________________
INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. 4)*
Cellpro, Incorporated
(NAME OF ISSUER)
Common Stock, $.001 par value
(TITLE OF CLASS OF SECURITIES)
151156 10 6
(CUSIP NUMBER)
__________________
* 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).
PAGE 1 OF 5 PAGES
<PAGE>
13G
CUSIP No. 151156 10 6
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO.
OF ABOVE PERSON
Ardsley Advisory Partners
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Connecticut
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
472,500
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
472,500
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
472,500
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
3.3%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON **
IA
_____________________________________________________________________________
** SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 2 OF 5 PAGES
<PAGE>
13G
CUSIP No. 151156 10 6
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO.
OF ABOVE PERSON
Philip J. Hempleman
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
United States
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
472,500
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
472,500
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
472,500
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
3.3%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON **
IN
_____________________________________________________________________________
** SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 3 OF 5 PAGES
<PAGE>
The Schedule 13G initially filed for the year ended December 31,
1992 of (i) Ardsley Advisory Partners and (ii) Philip J. Hempleman relating to
the common stock, par value of $.001 per share, issued by Cellpro, Incorporated
is hereby amended by this Amendment No. 4 to the Schedule 13G as follows:
ITEM 4. OWNERSHIP.
Not applicable
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS
If this statement is being filed to report the fact that as of the
date hereof the reporting person has ceased to be the beneficial owner of
more than five percent of the class of securities, check the following [x]
PAGE 4 OF 5 PAGES
<PAGE>
ITEM 10. CERTIFICATION. (if filing pursuant to Rule 13d-1(b))
By signing below Ardsley Advisory Partners and Philip J. Hempleman
certify that, to the best of their knowledge and belief, the securities
referred to above were acquired in the ordinary course of business, 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 purposes
or effect.
SIGNATURE
After reasonable inquiry and to the best of their knowledge and
belief, the undersigned certify that the information set forth in this
statement is true, complete and correct.
February 6, 1997
/s/ PHILIP J. HEMPLEMAN
Philip J. Hempleman, as
Managing Partner of
Ardsley Advisory Partners
/s/ PHILIP J. HEMPLEMAN
Philip J. Hempleman
PAGE 5 OF 5 PAGES
