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UNIVERSITY OF CALIFORNIA

DEPARTMENT OF ZOOLOGY
LOS ANGELES 24, CALIFORNIA 2), March 1961

Dr. Joshua Lederberg
Department of Genetics
stanford Medical School
Stanford University
Stanford, California

Lear Dr. Lederberg:

Next September Mr. Ronald Sederoff will be enterins the first year medical class
at Stanford. He has been working with me on the dumpy locus since September. I regret
that I shall be losing him to medical school because I have confidence in his research
interest and performance, Ron can work independently, think critically, and hes
unbounded enthusiasm fcr research. Frequently he works et night and on weekends to
meet the demands of the large numbers of flies which he has been counting for his pseu-
doallelic ‘crosses,

I hope that he will be able to take courses in genetics during his free time, and
I have encouraged him to do so. If there are any opportunities for him to work in your
laboratory with your associates, I would recommend him without any reservations and with
highest enthusiasm, It is very likely that Ron will choose a career in research and any
opportunities which you can offer to him or recommend to him would encourage this promise.

Sincerely yours

Lo lplor—

Blof Carlson
Assistant Professor of Zoology

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