HARVARD UNIVERSITY 
DEPARTMENT OF CHEMISTRY 
12 Oxford Street 
Cambridge , Massachusetts 02138 
US. A. 
December 18, 1979 
Dr. Donald Frederickson 
Director of the National 
Institutes of Health 
Bethesda, Maryland 20205 
Dear Dr. Frederiekson: 
I am writing to you to urge the enactment of the new 
recombinant DNA guidelines proposed in the Federal Register 
Vol . 44, No. 232, pp. 69210-69251. 
Sincerely yours, 
F. H. Westheimer 
Morris Loeb Professor of Chemistry 
FHW : mwc 
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