AURAL. CEN LR
PALO ALTO, CALIFORNIA

DEPARTMENT OF GENETICS
School of Medicine

January 21, 197]

Dear Dr. Blomberg--

Please forgive my delay in responding to your letter of
December 22, for which I must plead only a personal responsi-
bility. We have discussed the matter several times within our
group, and we are both very much pleased at your interest in
DENDRAL, and would Tike to cooperate in a realistic way to mini-
mize a costly divergence of effort. The worst possibility would
be a heavy investment in setting up a partially duplicated
apparatus, and esfiecially if there were incompatibilities that
made it difficult to install mutually interesting segments of
work on one another's programs.

On the other hand, the documentation and maintenance of a
program of this complexity is not a trivial responsibility, if
it is to be really available for "export", or better for
reciprécal world trade.

Fortunately, Dr. Allen Duffield from our group will be in
Europe within the next two weeks, and it would be of the greatest
advantage if you could arrange to discuss the groundwork at first
hand. He will be visiting Dr. Gustav.. Schroll in Copenhagen, who
has also recently returned from a tour with the Dendral group.

May I urge you to set up a small'international conference!
by a telephone call at your early convenience to Dr. Schroll.
Such a meeting could help to establish just what would be k
necessary for you to install DENDRAL, in some version, in your
own laboratory and what further efforts would be required for
this to be of real value to your work.

My expectatohons are that a visit to our lab of some weeks
duration would be indispensable, which we would be glad to make
accomodation for. Hwwever, we will underatand this better after
a meeting with Schroll and Duffield.

Yours sincerely,

CC: Schroll je +
Dudfield

Prof. Joshua Lederberg
Department of Genetics
Schoo! of Medicine
Stanford University
Stanford, California 94305

Dr. G. Schroll

Kemisk Lab. IT
Universitetsparken ¢
K¢benhavn ¢