CHEMICAL CORPS BIOLOGICAL LABORATORIES
VM DIVISION

Camp Detrick, Frederick, Maryland

2 May 1953

Dr. Joshua Lederberg
Department of Genetics
University of Wisconsin
Madison 6, Wisconsin

Dear Dr. Lederberg:
This is in reply to your letter of 27 April.

Dr. Ethel McNeil, Department of Pathology & Hygiene, College
of Veterinary Medicine, University of Illinois, has the stock
cultures of Salmonella including the pullorum and gallinarum strains
which we had at the University of California. If there are any of
the variants available to which you refer in your letter of 27 April,
I am sure she would be glad to send them to you. I am sending your
letter on to her for reply. I am enclosing a copy of the reprint
which you requested.

Recently I had the opportunity to visit with Dr. Kauffmann at
the Copenhagen laboratory. At the time of my visit he was busily
engaged in studies with some of your variant strains and is very
enthusiastic about the work which you are doing along this line.
I am sure that you have learned that he has been able to confirm
the findings of yourself and Edwards that these have remained as you
originally described. I expect to be at the University of Wisconsin
sometime in the near future and will drop in and discuss what I learned
from him at that time.

Best wishes—~

Sincerely yours,

Mjileiun BR Peinobvonr
WRH/alh WILLIAM R. HINSHAW

Chief, VM Division
Incl Gml C Biological Laboratories