THE HOSPITAL OF THE ROCKEFELLER INSTITUTE

FOR MEDICAL RESEARCH                              .,.

66~1.4 STREET AND YORK AVENUE, NEW YORK 21, N. Y.

January 23, 1948

Dr. J. Lederberg
Department of Genetics
College of Agriculture
The University of Wisconsin
Agricultural Fall
&dison 6, %isconsin

Dear Dr. Lederberg:

        Your letter of January 15th has just been
received.  In accordance v:ithyour request I have conferred
with Dr. Goebel.  Unfortunately he finds no p-nitrophenol
galactoside remaining in his collection. At his suggestion
I am enclosing herewith a reprint frcn the J. 3. C., 105,
1934, outlining the method for its synthesis chich he has
found better and more successful than that described in the
J. E. pj:., 1929.

        I am interested in your problem and regret
that we have none of the original preparation available.

OTA:fo