FEDERAL SECURITY AGENCY

PUBLIC HEALTH SERVICE
WRSSISROLE ADE

 

IN REPLYING, ADDRESS THE
°UBLIC HEALTH SERVICE

REFER TO:

Tuberculosis Research Laboratory,
411 East 69th St., New York 21, N. ¥.

April 16, 1952.

Dr. Joshua Lederberg,
Department of Genetics,

The University of Wisconsin,
College of Agriculture,
Madison 6, Wisconsin.

Dear Joshua:

Thank you for your explanatory letter and also
for sending the two cultures. Unfortunately W-1177 was
not viable and I wonder whether you could send me another
culture. I poured the contents of the tube into an NY
culture tube and incubated it. Previously we treated the
Salmonella cultures that Zinder sent us in the same fashion,
and they grew out all right.

I am looking forward to seeing what you find out
with strains Klt-p and Klt-h2. One thing I noticed in
testing them for their nutritional requirements was a some-
what poorer growth at room temperature than the one we had
observed originally.

Sincerely yours,
bens

Werner K. Maas

WKM/h1
PS. the wll ym G0 eblont~ eabiy fo Hh. offs Ff
Me forge FWlk af We W shen ?