CALIFORNIA INSTITUTE OF TECHNOLOGY
PASADENA

a

»ERCKHOFF LABORATORIES
OF BIOLOGY

March 13, 1950

Dr. Joshua Lederberg
Department of Genetics

The University of Wisconsin
College of Agriculture
Madison 6, Wisconsin

Dear Joshua:

T have received the two K-12 mutants for my class
experiments, and I thank you very much for your kindness.
The experiments will be made by the clase toward the
end of May, and I will inform you about the reeult.

Best regards,

Sincerely,
ch Lo
Renato Dulbecco

RD:mek