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August 13, 1948

Dr. Max Delbrucik

c/o Biological Laboratory
Cold Spring Harbor

Long Island, New York

Dear Max,

Thanks very much for your kind note of August
6th, and the copy of the remarks you made in Paris on
flux equilibriun, I find your account interesting and
decidedly worth considering in relation to our antigen
results. What I am trying to Imagine are experimental
means of distinguishing among the three hypotheses: flux
equilibrium, varlable gene activity, and plasmagenes.
I am partial at present to the latter because it has
thus far proved fruitful in ow work: it has led as to
a number of predictions which have been verified. But
this is, of course, not enough.

I am returning your Paris discussion of which
I now have several copies for various people interested
in the question.

With best regards,
Cordially,

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