March 18, 1952

Dr. Philip B. Cowles
Dept. Microblology
Yale University

New Haven, Conn.

Dear Dr. Cowles:

Wy wife and I were interested to read the recent papers from your
laboratory on lysogenicity in B. megateriua. We have been interested
in BE. coli lysogenicity for some time, but are only just getting around
to sumaarizing our work. The enclosed abstract may give some idea of
ite directions.

I wanted to ask you, first, for reprints of the above-gentioned, but
also whether, by any chance, you can help me locate or find more about
the "flagellar" phages originally described by Sertic and Boulgakov, and
later by Rakieten and Bornstéén. Rakieten's military service lost his
cultures for him, and I ama little pessimisticapbout the chances of
reisolating them by straightforward search. Have you ever heard anything
about them?

With best regards,

Sincerely,
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