July 12, 1968

AIR MAIL

James F. Crow, Ph.D.,
Professor of Medical Genetics
The University of Wisconsin
Laboratory of Genetics
Genetics Building

Madison, Wisconsin 53706

Dear Jim:

I received a letter from Josh today and am enclosing a copy
of the symposium as it now stands. If Arno is going to chair the
evening session it may be better to get someone else to introduce
the afternoon speakers (Stern, Neel, Beadle, or Graham).

Thanks for all you have done, and I'm certainly delighted to
see you as an active participant. —— knowing you have a message
to share concerning mutagenesis.

By the way, I have long felt a need for a term which means
“chromosome breaking agent" which is quite cumbersome compared —
to the words mutagen, teratogen, carcinogen, recombinogen, and
leukemogen. What do you think of "clastogen"? "Chromosomoclastogen"
would be more accurate but would not sound as good. If you could
use the word when discussing agents which cause chromosome breakage,
feel free to adopt it.

See you in September.

Sincerely,

Margery W. Shaw, M.D.
7-12-68
MWS: ds