The Jane Coffin Childs Memorial Fund for Medical Research
Board of Scientific Advisers

Office of Director
S. BAYNE-JONES, Director i, .
‘ Yale U:
RALPH G. MEADER, Assistant Director e University School of Medicine
RUDOLPH J. ANDERSON 333 Cedar Street
Ross G. HARRISON New Haven 11, Connecticut

JOHN J. MorTON
PEYTON Rous
GEORGE M. SMITH
M. C. WINTERNITZ

July 25, 1946

Mr. Joshua Lederberg
Osborn Botanical Laboratory
Yale University

Dear Mr. Lederberg:

It was good of you to send us a carbon copy of the manuscript of
your joint paper with Dr. Tatum on "Novel Genotypes in Mixed Cultures of
Biochemical Mutants of Bacteria," read at the Cold Spring Harbor Symposium.
Dr. Bayne-Jones and I were pleased to refresh our recollections of the
discussion we had with you and Dr. Tatum on July 18. Thank you.

Sincerely yours,

R. G. Wleader

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