FSTUTUTO SUERDTERAPICO MILANESE
“SEPAFINO BELPANTD

_ ; ENTE MORALE AGGREGATO ALLA UNIVERSITA DI MILANO
MILANO - VIA DARWIN, 20

TELEF. 30640-30677 -31757 «32823-33017 TELEGR.: SIEROTERAPICO - MILANO U.P. Il. ©, MILANO N. 48709

Direzione Scientifica

Dear Lederberg,

Thank you for your letter and your offer to repu=
blish the paper on chlorom:cetin resistance. I shall be of course
very pleased,and have written to the editors of Nature about it.

As you will see from the heading of this letter,I
have left England. I have asked Professor Fisher a year of leave,
but it is likely that I shall reestablish myself in this country.
On bhhe whole I can get here better working conditions,especially
more technical help than I had in Cambridge. All I had there was
a fifteen years girl for the preparation of media ete. I shall
certainly miss,on the other hand, Fisher4s great encouragement and
friendship.

I have been very interested to hear of your new fin=
flings on the frequency of crossable strains . I often feal we still
lack knowledge of conditions in which any strain can cross,but thot
perhaps such conditions exist, So far,in trials ~ainly with bioche=
mical mutants L have failedwif seven strains ( one Aerobacter, one
Proteus, Shwe coli ) and miomeedn®. Wik none. At the rarvent T have
left this type of research,and am sinply -byyins to Sring ‘he shloro=
mycetin story ready*for full publication.

I am enclosing a reprint of thr letter to Nature ;
three more of the same will follow by ordina'y mail,together with
reprints of an oldish italian paper,which war meant nerely Sex as

| propaganda for sex among 1ocal bacteriologists (who proved more
3 Fesponsive than the British ones).

Some time ago I tried to get some financial support
for epending a summer in the States,but have been unsucoessful . I
an thinking of trying with the Rockefeller ant Fulbright institutions
but I should think it would be now for summer 1952.

Yours sincerely

Ganll
J L.L.Cavalli
Istituto Sieroterapico
Mihanese

Via Darwin 20
Milan, Italy