UNIVERSITY OF RHODE ISLAND
KINGSTON. RHODE ISLAND

DEPARTMENT OF BACTERIOLOGY

November 21, 1952

Dr. Joshus Lederberg
Department of Genetics
University of wisconsin
Medison, wisconsin

Deer Doctor +ederberg:

il was greatly interested in your lecture in Hoston
last week, end would like to tell you how much i enjoyed
it. Several of my students who were present also commented
that they were surprised to be able to understand so much
in spite of their limited background.

In connectio: with e¢ textoook menuscript on which
tL am working I would like to be able to refer in some detsil
to your work on serologic varisnts of Sel. typhosa. I have
the reference to the abstract of the paper presented br
or. Zinder and yourself et the Boston meetings last May.
Has that work been published in full as yet? There was
the later work also, which I presume has not been published,
in which you trensduced a diphasic form, or at least a
phase 2 form, of the same orgenism. I wonder if you could
give me = brief ststement of that work to which I might
refer. If you feel that it would be premature, I will of
course not mention it.

I will eppreciate eny comments you may care to meke,

end also any reprints you mey hsve et this time or in the
future on such serologic trensductions.

Sincerely yours,

Platip X. Curprre

Philip L. Carpenter