UNIVERSITY OF MINNESOTA

Tue Mepica. ScHoo.i
Mruyneaporis 14

274 Lyon Laboratories

DEPARTMENT OF PATHOLOGY
DIVISION OF CANCER BIOLOGY

March 21, 1960

Dr. Joshua Lederberg
Department of Genetics
Stanford University
School of Medicine
Stanford, California

Dear Dr, Lederberg:

We are thinking of sending the enclosed letter either to Science or to
Dr. Leroy Burney, Surgeon General, Public Health Service, In view of your
recent and very thoughtful discussion of possible contamination from other
Planets we thought we would get your reaction to such a letter concerned with
terrestrial contamination, In case that you agree with its contents, would
you be interested in signing it together with us? We feel the letter would
carry more weight and conviction if somebody of your standing in the field
of genetics would join us in this,

Sincerely,
Cy John J, Bittner Dr. Herbert M, Hirsch
Professor and Director Associate Professor
Cancer Biology Cancer Biology

EME: gc