Cornell University 
Division of Biological Sciences 
Section of Genetics & Development 
Bradfield Hall 
Ithaca, New York 14853 
(607) 256-2100 
23 March 1981 
Dr. Elizabeth Mllewskl 
Building 31, Room 4A52 
ORDA-NIH 
Bethesda, MD 20205 
Dear Dr. Milewski; 
I have recently seen a copy of the changes in NIH Guidelines for Bacillus 
subtilis recombinant DNA experiments proposed by Donald H. Dean. 
I have worked with and studied Bacillus subtilis and its bacteriophages 
for the past fifteen years. On the basis of that experience, I fully approve 
of Dr. Dean's proposals. 
Sincerely yours 
sk 
cc: D.H. Dean 
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