Septeaber 24, 1950.

Dr, Harry Eagle,
Microbiological Institute,
National Institutea of Health,
Bethesda lA, Haryland.

Dear Dr. Eagle:

I shall be very pleased to send you a subculture of Facherichia coli
K-12. Your request is by no means inordinate: to th contrary, I am very
gratified at the interest implied,

Please do not hesitate to call upon me if I can be of any further

assistance with respect to such aatterm as other strains or additional
information.

Yours sincerely,

Joshua Lederberg,
Associase Profesecy of Genetics