NEW YORK UNIVERSITY-BELLEVUE MEDICAL CENTER
NEW YORK UNIVERSITY COLLEGE OF MEDICINE
550 FIRST AVENUE, NEW YORK 16, N.Y.

DEPARTMENT OF PHARMACOLOGY March 1, 1957 OREGON 9-3200

Dr. Joshua Lederberg
Department of Genetics
University of Wisconsin
College of Agriculture
Madison 6, Wisconsin

Dear Joshua:

I was digppointed not to see you last week in Evanston . I was particularly
sorry to hear you weren't feeling well, and I hope nothing will interfere with
your enjoying your trip to Europe.

“TT haven't written to you for a long while because the protoplast story
bogged down into a lot of trivialities. It turns out that the DAP-less protoplasts
are a good deal tougher than those created by penicillin. Surprisingly, during
prolonged incubation with sucrose and in DAP the prepaygtion of fragt units,
after reading the maximum of 95-98% at about two hours, then decrea#es to as low
as 50%. Yet during this period growth has ground to a halt and the units remain
nice’and spherical.

I understand you are going to Paris soon, and I will probably see you there
a few days before the London meeting. My travel plans still aren't quite final.

As you may know, we have here at N.Y.U. an Honors Program to encourage
selected first and second year students to get interested in research. Each
Saturday morning they get a lecture designed primarily to show them how exciting
research can be. It has been a very succesful program and some speakers have
included Rollin Hotchkiss, Dubos, and Boris Magasanik, as well as local talent.
There is an honorarium attached for outsiders and if you could manage this on
a Saturday morning, either going to Europe or returning, we would love to have
you." In any case, I hope you will be sptdping in New York on your way to Europe,
and Liz and I would love to have you and Esther stay with us. We cannat absolutely
guarant@z quiet, but on the whole Frankie has been extraordinarily kind.7# See you
soon.

Sincerely,

Bernard D. Davis

1831-32 One Hundred Twenty-fifth Anniversary 1956-57

A Private University in the Public Service