YALE UNIVERSITY
LABORATORY OF BACTERIOLOGY
NEW HAVEN - CONNECTICUT

BRADY MEMORIAL LABORATORY
310 CEDAR STREET

March 31, 1952.

Dear Lederberg,

I have been expecting the reprints of the phage papers each day,
put they have not come as yet. When they do, you will get reprints.

As for the "flagellar" phages, if Rak has not got them any more,
the only source that I can suggest is Dr. Igor N. Asheshoy, who is ,I believe,
at the New York Botanical Gardens. He has a great collection, and may have those.

Treffers has expressed an interest in having a culture of your
sensitive W-518 coli mutant. Could you send him one.

With best wishes,

Very sincerely,

y Se BGK,

Philip B. Qowles