July 28, 1955

Dr. Ellsworth C. Dougherty
Department of Physiology
University of California
Berkeley 4, Calif.

Dear Dr. Doughesty:

For reference to the sexual mechanisms of E. coli, I would urge you
to read the paper that I gave at the Oak Ridge Symposium on Genetic Recom-
bination last spring. This has just appeared as Supplement 2 (May 1955)
to the Journal of Cellular and Comparative Physiology, which should have
been received by your library within the last few days. Curt Stern probably
has a copy; I am sure that Dr. Hollaender would be glad to send you the
supplement on request.

As soon as I get the reprints on this paper, I will start mailing out

anew batch. I will be grateful to have yours. Please save one of your
review for me, if possible.

Yours sinceraly,

Joshua Lederberg
Professor of Genetics