Kansas State College

Manhattan, Kansas

Department of Bacteriology Jamuary 14, 1956

Dr. J. Lederberg, Dept. of Genetics
University of Wisconsin —
Madison, Wisconsin

Dear Josh,

I have a favor to ask. I should
like to obtain an F+, an F= and an
H fr strain of E coli Kl2. I should
Breatly appreciate it if you could
send these to me.

_ Sincerely

Cs ¢.

A, EBisenstark

AE sdkl