Nepartmert cf Becterlology,
Univercity of Onlifornia,
Berkoloy 4, California.

July WO, Wee.

Profecoor Le Os Dim,

Dopartzcnt of Zeolesy, .
Colurhia University,

Rew Yor). 27,  s¥s

Doar Or. Dunn:

Sheavo juet hee en opperturdtiv 4c plonec ot ¢ eepr of tho new
edition  Principlon of Conetice, by S$nrett, Durr and Debcheraky.
Naturclly, To vwes ploased te obnarve *he eoncidernhic omchaste given
to recent reucerch on m4ercergantona.

there vee oue point of rofercree, hovevor, vhich T tolleve chould
be corveoted fnouny Neture voviofonr. A% fue or Abgen clecen in the
tart, an oolique reference Lo made to the worl: of Lederberg borring
en tho ccourrenes of genetic roca Uincthon fn Unetertc. In oll fadyneoo,
tie eltation cheull le te Patan aad leterhorg, om the btuste heth of
Teta! s directs of cat rertsetration fn 4s receorsh, cord of publiea-
Vda: praceity (vic. Loterterc a Tater, 106, Col*+ Sprfsc Parhor Sympo-
OLicty Wy eeed Tibr and loderhorg, i047, “cor. Ractorintorcy, 53:673-684).

This 1s, porhops, a vory rdaute podrthhut tonthock reforoness are
oMtor: autoontalytic, wal £4 would be unfortunate 22 aur écprenaton
wore reinforced which corved to minimize Tatim'o contrétutiona in this
fiald. ,

With boss personal regards,

\

SA{necorely,

Joshua Lederberg,
Aonociate ProZosnor of Gonetics