MARQUETTE UNIVERSITY SCHOOL OF MEDICINE

3561 NORTH FIFTEENTH STREET
MILWAUKEE 3, WISCONSIN

DEPARTMENT OF MICROBIOLOGY
AND IMMUNOLOGY

November 15, 1950

br. J. Lederberg
University of Wisconsin
j Department of Genetics
Madison, Wisconsin
bear vr. Lederberg:
Last year you were so kind as to give me a culture of
&. coli mutabile. Unfortunately, this strain was lost while
i was in Europe last summer. 1 would appreciate it very much

if you were so kind as to send me another strain at your earliest
convenience.

Thanking you very much for any assistance you may show
me, I remain with best wishes

Very sincerely yours,

df Va” Cs
ALK/ems A. L. Kappus, M. D.