con?

December 1, 1950.

Dr. C. P. Swanson,

Dept. Biology,

Johns Hopkins University,
Baltimore 18, Maryland.

Dear Carl:

Thank you for the invitation to write for QRB. Unfortunately, just a
few days ago, I contracted to write a aimilar article for Physiological
Reviews on Unicellular Genetics. Very likely, QRB would have been a more
appropriate place for the article tha& Physiological Reviews, but it would
be awkward to change plans now. For the present, therefore, I must decline
this invitation. In a couple of years, however, the critical urge may wax

again, and I would like to reserve the privbklege of reopening this question, |
if I may.

As to book-reviews, I shall be glad to cover McEwen's Bacteriological
Technique, but do not feel that Viruses 1950 is appropriate for more than
a very short notice or description. I'll be glad to submit such if you'd
like, but someone like A, Novick (Radiobiology-Chicago) or Gas Doermann
(Oak Ridge) might wish to do a more extended job.

Yours sincerely,

Joshua Lederberg.

4°35