\ December 3, 1949.

Dr. UM. R. Zelle,
Bacteriology Lab.,
Cornell University,
Ithaca, N.Y.

Dear Max-

Enclosed is a fresh isolate of H-206. It is a pool of two colonies on
EMS Lac which concurrently gave Lacy on EB Lac. It has not been rechecked,
especially on maltose; I will do s0 promptly. However, it should be immediately
useful, although 1t will have segregated to a large extent on this medium
(outrient agar) by the time you get it.

I hope I can remember to bring along a couple of slides showing the
huclear cytology of H-168. It 4s complex enough to adult readily of the
many~nucleus interpretation of the pedigrees.

See you in NY.

Till then,

Joshua Lederberg