BOARD OF TRUSTEES EXECUTIVE COMMITTEE

CARL LAMANNA, R. E. BUCHANAN CARL LAMANNA, CHAIRMAN

SOCIETY OF AMERICAN BACTERIOLOGISTS R. E. BUCHANAN
H. H. McKINNEY M. H. SOULE
AMERICAN PHYTOPATHOLOGICAL SOCIETY
WH SOULE AMERICAN TYPE CULTURE COLLECTION
AMERICAN ASSOCIATION OF 2029 M STREET. N. W. RE MAN
PATHOLOGISTS AND BACTERIOLOGISTS WASHINGTON 6. D. Cc. E A. WEISS
D. H. WENRICH
AMERICAN SOCIETY OF ZOOLOGISTS ASSISTANT CURATOR
R. W. DAVIDSON R. LLOYD PHILLIPS
MYCOLOGICAL SOCIETY OF AMERICA
N. R. SMITH “THD. DAVIS. BacremoLosion
AMERICAN INSTITUTE OF BIOLOGICAL SCIENCES . ,
R. D. COGHILL, G. W. IRVING, JR. SECRETARY-MANAGER
NATIONAL RESEARCH COUNCIL KATHERINE ALVORD

January 23, 1952

Dre Joshua Lederherg
Department of Genetics

University of VYisconsin
Medison, Wisconsin

Dear Doctor Lederberg:

We have a request for a lysogenic strain of
Escherichia coli. Dr. Wyekoff, of National Institutes
of Health, suggests thet you were credited by Dr. Luria
at one time as the source of a strain of this type with
which he worked. If you are still carrying it, may we
have the fevor of receiving a trensplent? Can you
maintain a phage-carrying strein by your silica-gel
method of preservation? I heve been trying to line up
a research project on this method of preserving cultures,
and get a smell grant to support it,since it would require
extra assistance, and am horeful that we can scon test it
on a representative ranvse cP cultures.

Thank you for your kind assistance.

Sincerely yours

Premne.e A: Weer,

Freeman A, ‘Jeiss
Curetor