UNITED STATES
ATOMIC ENERGY COMMISSION

WASHINGTON 25, D. C.
IN REPLY REFER TO:

BMB:HHP

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

Dear Dr. Lederberg:

I am writing just a note to let you know that up to the

present time no request for a renewal of your contract, AT-
(11-1)-64 on the "Cytogenetic Effects of Radiations on Bacteria"
has been received. According to our records the contract

was completed on February 28, 1953

Itmay be, of course, that you do not care to request a renewal
for the coming year. However, if you are planning a renewal
request, it should be received in duplicate at this office at
the earliest possible date. Two copies should also be forwarded
to the Chicago Operations Office,

I am still hoping to get to Wisconsin one of these days in
order to have a chance to talk over your interesting trans-
duction work; especially so, since our Amherst work still
shows some differences even though they are probably not
important.

Kind regards,
Sincerely yours,
. / a
tT hoegl
Harold H. Plough

Assistant Chief, Biology Branch
Division of Biology and Medicine