on 32°) March 1556

J Lederberg

Dept.of Genetics
Univ.of Wisconsin
Madison, Wisconsin, USA

ae Dear Sir, Possessing the majority of the
type culture collection ot Saimonella and the immunsera
corresponding them, I Should like to attempt some trans-—
‘ductiona in ccurse of my studies on Enterobacteriaceae.

I shouid be very obliged to you for
sending me the PLT 22 phag stock or the corresponding
1ysogenic strain of S.typhi murium,as well as an indi-
cator strain tuo. In literature 1 found your phagwpre-
paration the most conveniently used throughout the ex-
periments.

Reepéting my request, I wait for your
reply, and if possible, for your kind tending of the
pheg preparation and some reprints of your former work
on the same subjects.

Thanking you in advance for this cour-

tesies, gincereLty yours

os Dr.G. Kelemen
vj Institute for Microbiology
- Medical Schuol,Pécs, Hungary

} J1Y Raké6czi ut 2.Magyarorszag.