CHAS. PFIZER & CO, INC.

ESTABLISHED 1849

PLANTS & LABORATORIES SALES OFFICES

BROOKLYN,N.Y.
GROTON, CONN.
TERRE HAUTE,IND.

Manufacturing Chemists NEW YORK

CHICAGO
11 BARTLETT STREET SAN FRANCISCO

BROOKLYN G, N.Y.

September 28, 1948

Prof. Joshua Lederberg
Department of Genetics
College of Agriculture

The University of Wisconsin
Madison 6, Wisconsin

Dear Prof. Lederberg:

Sorry we haven't much data on the points you men-
tion in your letter of September first; however, I enclose
some reprints which cover the work which has been done here.

Please let me know if we can be of any further help
to you.

Sincerely,

N. roe : be

oe Sof os pO tts
Lot i

Ln ee

Gladys L. Hobby, Ph. D.
GLH:ns