THE UNIVERSITY OF WISCONSIN (Aur 1965

THEORET ICAL CHEMISTRY INSTITUTE

1112 WEST JOHNSON STREET
MADISON, WISCONSIN §3715

JOSEPH 0. HIRSCHFELDER 19 July 1965 TELEPHONE:
DIRECTOR 262-1511
AREA CODE 608
Cc. F. CURTISS
ASSOCIATE DIRECTOR

DANIEL D. KONOWALOW
ASSISTANT DIRECTOR

Professor Joshua Lederberg
School of Medicine
Department of Genetics
Stanford University

Palo Alto, California

Dear Joshua:

Thank you very much for the reprints which are very
interesting indeed.

I talked to Cy Leventhal, and was very pleased to learn
that he has made great progress on the sinulated molecular models.
Since my ideas are a bit different from his, we will proceed
independently, at least during the first stages.

Best wishes.

Cordially,

Joseph 0. Hirschfelder

oe’ YaTiHosyl4l

JOH: 11b