“INST. FOR CELLFORSKNING OCH GENETIK Stockholm, April 1, 1955.
MEDICINSKA NOBELINSTITUTET
KAROLINSKA INSTITUTET
STOCKHOLAL 60
Telefon 23 54 80

INST. FOR CELL RESEARCH AND GENETICS
KAROLINSKA INSTITUTET
STOCKHOLM 60

Dr. J. Lederberg
Department of Genetics
University of Wisconsin
Madison 6, Wisconsin, USA

Dear Dr. Lederberg:

We are at present attempting to obtain a full-time research
professorship for Dr. George Klein in order to stabilize his own personal
position and to insure the continuation of his valuable work in this institute.

As you may know, a personal research chair, which is on a life-time basis,
is very difficult to obtain in Sweden and it is necessary to furnish the most
elaborate proofs of the scientific ability of the man before such a chair can

be created. Furthermore, the desirability of such an arrangement must be
demonstrated to the authorities and, ultimately, to the Swedish Parliament,
in whose hands the final decision rests. In these efforts it would be very help-
ful to have the testimonies of a number of prominent scientists.

Because [feel that you are in a position to evaluate George
Klein ’s research, I should appreciate it if you would be kind enough to
write me a brief letter giving your personal views on his work and its biological
significance.

In the last few years the work of Dr. Klein and his associates
in this Institute has expanded rapidly, Especially promising is the work with
different strains of ascites tumors and their use in quantitative cytochemical
and genetical studies. At present a special animal house is being erected
which will greatly widen the working facilities of the group. It will also increase
the possibility of making special strains available to other laboratories in the
field, fulfilling a need which is at present met only with considerable difficulties.

It is in the light of these considerations that I am asking for
your help in this matter. I am sorry to bother you with such a request but I

assure you that you would do us a great favor by your assistance.

Very sincerely yours,

Nv 2

T. Caspersso