UNIVERSITY OF CALIFORNIA

DEPARTMENT OF CHEMISTRY

October 9, 1959
BERKELEY 4, CALIFORNIA

Dr. J. Lederberg
stanford Medical School
Stanford, California

Dear Josh:

I am enclosing the declassified report on the air sample
up to 32,000 feet. You will note that the number is 25
organisms per cubic meter but will certainly be variable
depending upon the time of year, weather, and so on.

 

Melvin Calvin
Professor of Chemistry

MC :mf
Enclosure