August 5, 1951.

Dear Werner:

It is som time since I promised to return the assembly for holding
the molecular filters that I borrowed at the time of my visit to Camp
Detrick. Unfortunately, I cannot finé any record of the mme or installation
to whom it should be returned. It would save me some embarrassment, and I
would appreciate it if you could give me the mme and division of the
person in bdophysics from whom the filear assembly was borrowed. I will
send you a copy of our very brief findings rather than take time to
mention them right here.

Thanks,

idoshua Lederberg —