Reply lo Atm of 
NASA 
National Aeronautics and 
Space Administration 
Washington, D.C. 
20546 
SBL-3 (78-375) 
AUG 1 4 1978 
Dr. Joseph G. Perpich 
Associate Director for 
Program Planning and Evaluation 
National Institutes of Health 
Bethesda, MD 20014 
Dear Dr. Perpich: 
I have no substantive comments on the proposed revised 
guidelines. Although the procedures have in some ways 
been relaxed, I believe they are consistent with the 
public safety and interest, and that work in the area 
of recombinant DNA research should proceed accordingly. 
Sincerely, 
<v 
David L. Winter, M.D. 
NASA Director for Life Sciences 
[A-12] 
