Gnibersity of Toronts Je

TORONTO 5, CANADA

DEPARTMENT OF MOCMSRKEXt MicrobLology
School of Hygiene

May 10, 1960.

Professor Joshua Lederberg;
Departnent of Benetics,
Stanford University,

Palo Alto, Calif,

Dear Professor Lederberg:

I would like to thank you very much
for sending me a reprint of your paper on sib-
selection of pre-adaptive mutants, from Genetics
19563 and also for the kind note enclosed therein,
We have found this technique very helpful for
isolaking a streptomycin-resistant variant of
Vibrio comma.

ot Corbwx0p

I am about to branch further afield
at the moment, both in lectures and labs, (particularly
in lab.research, having just returned from a stiml-
ating time with Dr. Robinow at Western), and am

Yb wondering if you could let me have reprints of

al relevant papers, namely:
GAS <0
J. Bacteriology 71: 497 (1956); 75: 143 (protoplasts)
& olarvey Lectures 53: 69 (1959),

Again, very many thanks for your kindness,
And apologies for my troubling you.

Yours sincerely,

wv 2 Judith Hoeniger, Ph.D.,

Assistant Professor,