USTREDNI USTAV BIOLOGICKY

PRAHA -DEJVICE, Na cevitisti ¢ 2
tel. 759-41—4

Dr. Joshua Ledeberg

Genetics Department
University of Wisconsin
I Madison, Wisconsin

Vase znacka Vas dopis z

Vée:

Dear Doctor,

Nase znatka

Praha
11.21.1955

I thank you once more for reprints

you have sent me.

I am busy with the action of ultraviolet
radiation on ¥.coli. I should be glad
if you could send me Escherichia coli lysogenic

strain K-12.

I enclose a list of the University
Collections of the Protophyta. I shall be glad
to send you strains you will take an interest in.

Very truly yours

Statni banka éeskoslovenska i¥adovna I Praha & Gétv 108-0138

Y
glia Vébif
Be Véchet
INSTITUTE OF BIOLOGY

Crechesiuint hesdony of Science
Na evigisti, 2

Investiéni banka Praha é. Gétu 139/79410190

 

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ST 04 — 4707-51.

Prague

- Czechoslovakia