SEP 5 1969

405 Francisco Street
San Francisco, California
September 13, 1969

Professor Joshua Lederberg
Department of Genetics
Stanford University

Palo Alto, California

Dear Professor Lederberg:

I have been interested for some time in the question
of the genetic damage, involving gross birth defects
and deformities, caused by the low-level ionizing
radiation released by Plowshare nuclear explosions
and by nuclear power plants operating under normal
(i.e. accident-free) conditions. On September 9,
1969, Dr. Melvin M. Grumbach, Chairman of the Depart-
ment of Pediatrics, U. C. Medical Center, stated:

"In this past Sunday's edition of the San
Francisco Chron¢tle and Examiner the column
written by Professor Joshua Lederberg of the
Department of Genetics at Stanford University
was devoted to some of the issues you raised
including an assessment of the report from the
Lawrence Radiation Laboratory."

I would be grateful to have a copy of your assess-
ment of the scientific documentation on which Dr.
Tamplints estimate of fetal deaths from fallout is
based,

Sincerely,

C46
C. D. Calsocyas
Copy to The National Foundation (March of Dimes)

Copy to the Board of Regents, University of California
Copy to the Pacific Gas and Electric Company