Madison, Wis.

January 23, 1950.

Dr. E. S. G.-Barron,
Dept. Biological Chemistry,
Chicago 57, Illimois.

Dear Dr. Barron:
Thank you very much for your consideration in sending me the sample
of ( CH20H)5-C-NHp, and for the reprint of Gomori's description of these

new buffers. These materials should be very useful.

Sincerely,
é / e i

4 Joshua Lederberg , i

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