WASHINGTON

 

\ UNIVERSITY

 

 

 

SAINT LOUIS (5), MO.

THE HENRY SHAW SCHOOL

OF BOTANY August 21, 1946

Dr. Joshua Lederberg
Osborn Botanical Laboratory
Yale University

New Eaven, Connecticut

Dear Joshua:

I want to thank you very much for the directions con-
cerning your new method, which we have been using with 4
great ceal of profit.

Our own attemots to work the vitamin deficiencies
into pedigrees héve not been particularly fruitful and I
am beginning to wonder if there isn't some fundamental dif-
ficulty involved, especially since Beadle has such an
extensive series of these characters and has as yet re-
ported no pnedigree involving then.

We would, however, be very much interested in trying
to work something out with yeasts, if it is possible.
Certainly you would be in a better position to cooperate
with us in this job than anyone else and I would be very
happy to work with you. ‘fe are sending you one of our
best cultures and in the event you develop any mutants from
this, we would be pleased to mike some matings and sttemnot
to analyze the progeny.

‘ith best regards to all the other folks in the lab-
oratory, I an,

Sine erely your

Carl C. Lindegren faye
> ras

Research Professor =

  

CCL: jem ae

pS. Will and difaid Add HH Rema At,
Wa hore bal ey warn don) es at ety pp ~
Newt Aaa for abee . WU witG poor Lenny