THE WELLCOME LABORATORIES OF TROPICAL MEDICINE

J. 5. K, Boyd, O.8.E., M.D., F.R.C.P., F.R.S., Director

fs

tb.
re
Telegrams:
WELSCIENCE NORWEST LONDON G3 Telephone : EUSton 4688
Cablegrams * 4
WELSCIENCE LONDON a

ISKB/MB 183-193, EUSTON ROAD, LONDON, N.W.1. AIRMAIL:

Dr. Joshua Lederberg, 28th October 1952.
Department of Genetics,

University of Wisconsin,

Madison 6,

Wisconsin, U.S.A.

Dear Dr. Lederberg,
As promised, I am now

sending you a culture of Salmonella typhi-

 

murium C4l which is an indicator for the
phage present in 1404. It is a very weak

phage indeed and sometimes fails to show
up at all.

Yours sincerely,

.
a
° mill
. -

—_—

STY. B3