UNITED STATES DEPARTMENT OF AGRICULTURE

AGRICULTURAL RESEARCH ADMINISTRATION

BUREAU OF AGRICULTURAL AND INDUSTRIAL CHEMISTRY
PEORIA 5, ILLINOIS

October 8, 1952
NFC

Professor Joshua Lederberg
Associate Professor of Genetics
Department of Genetics
University of Wisconsin
Wadison 6, Wisconsin

Dear Professor Lederberg:

I am pleased to send you a copy of the reprint entitled,

"Isolation, Cultivation, and Conservation of Simple Slime
Molds," which appeared last year in the QUARTERLY RiVIEW
OF BIOLOGY.

Unfortunately, further investigation of the origin and
cause of rough variants in selected bacteria following
slime mold feeding was delayed since Dr. Bore had to re-
turn to the University of Illinois the first of July.
Since that time neither he, nor I, have had an opportunity
to do very much more with this problem. We still hope,
however, to round it out to a derree at least sufficient
te warrant a brief publication. ‘

I agree with you that Professor Ray's paper is a very
significant one and you will be interested to know that
she received this year a Guegenheim Fellowship with the
expectation that a part of her time would*be spent in my
Laboratory. It was planned, of course, that she would
come here. How this will all work out now that I am
joining the staff at the University of Wisconsin on Janu-
ary 15 I do not know, but I was assured by Professor
Fraizer that if she wished to do so, we could arrange
for her to come there instead.

Iam looking forward very much to my work at Wisconsin,
and hope that I shall have many occasions when I can have
the benefit of your stimlating counsel and advice.

Sincerely yours,

) |
Ww mA Crh pa
Kenneth B. Raper, In Charve
Culture Collection Section
Fermentation Division

Northern Regional Research Laboratory
Enclosure