UNIVERSITE D

E LIEGE

INSTITUT

DE

BACTERIOLOGIE

wher -1678-

LE 5 September 1951.

41, RUE DES BONNES-VILLES
LIEGE

Dr.J. LEDERBERG

Dept.of Genetics
University of Wisconsin
MADISON 6 (Wis.)

U.S.4.

Dear Dr.Lederber:z,

I have sent strains WR1I68 and WRE434.
Strain WR168 was derived in several steps from your
strain W1177; it is resistant to most of the entibiotic
strains but partially susceptible to those producing co-
licins G, H, Sl ana 54. Strain WR&45 was dcerivea from
your strain 58.161 ana is resistent to every colicin.

I shoulc be very glad to receive a
set of reprints from your work on becteriel genetic,
specially those published in "Genetics" and "Proc.natr
Acad.Sci." which are journals not cvaileble here in
Liege.

I am very sincerely yours

Lr.P.FREDERICg
Agree.