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Sonneborn mss.
Manuscripts Department, Lilly Library

: Indiana University, Bloomington, Indiana

 

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_ For Reference Use Only.

CARNEGIE INSTITUTION OF WASHINGTON

DEPARTMENT OF GENETICS

COLD SPRING HARBOR, LONG ISLAND, N.Y.

November 20, 1945

Professor T. M. Sonneborn
Department of Zoology
indiana University
Bloomington, Indiana

Dear Sonneborn:

i am very sorry to learn about the bad luck you had last
summer and fall. JI had heard earlier about the illness of your
younger son, but did not know that the other boy has been ill
also. JI hope that all your family is well now.

Our work with bacteria is making good progress. Luria's
group is particularly active and is getting fine results. I
found that mutations in coli to B/1l (resistance to phage T1) can
readily be induced by both ultraviolet and x rays; that part of
these mutants show up immediately after the treatment, before the
bacteria have divided, but that the majority of them show up later
after the bacteria have passed through 1 to 10 cell divisions.

It will be entirely all right if you send your manuscript
for the Advances by the 15th of December. The approximate number
of words per printed page.is 500. Do not worry if your paper should

be slightly longer than 50 pegss. The two manuscripts that have
been received so far are quite brief.

With best regards,

Sincerely yours,

M Peurog

MD M. Demerec

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