Stanford University. Stanford. California 9430s 
PAUL R. EHRLICH 
Bino Professor of Population Studies 
Department of Biological Sciences 
September 15, 1978 
Donald S. Frederickson, M.D. 
Director 
Department of Health, Education and Welfare 
Public Health Service 
National Institutes of Health 
Bethesda, Maryland 20014 
Dear Dr. Frederickson: 
In my opinion as an evolutionist and environmentalist the potential 
benefits from recombinant DNA research are so great that it would be 
foolhardy to restrict such research largely on the basis of imagined 
risks. I approve of the continuing review of such research by com- 
petent scientists and favor the revision of the NIH Guidelines from 
time to time in accordance with the recommendations of the reviewing 
group. 
PRE : j lb 
[A-157] 
