Wolfram Heumann~ Jan. 28.1959
Bote Inst.T.H.

Braunschweig

Humboldtstr.1.

Germany

Professor Dr.Joshua Lederberg
Dept.of Genetics,Medical School
Stanford University,California

Dear Joshua!

All the best wishes to Esther and you from Barbara and me for a
happy new Year and for a good start in Stanford.Excuse the delay of my
letter please,but in the mmumkkgs last months of the old year I performed
my habilitation and in the same time I did fall verg ill with x ischio-
lumbalgia and I could be restored to health only after a bad jaw operation. -
But now all things are all right and I very assiduous to make new
purartons in my starforming bacteria strains to get better recombination
results. \

But before talking about bacteria take ones more the best congratu-
lations from Barbara and me for the Nobel Price.We are very happy that
you get this honourable appreciation for the ingenious scientific
building bhild from you.Now we are double proud of working in your lab.

In October 1958 Barbara and I made a trip by car to northern Italy
and visited Professor Cavalli in Pavig.We was very happy to meet hin.

We talk about your visit in April this year.By this occasion Barbara and
I would by very glad to meet Esther and you.I dont now your travel route,
but perhaps you can touch Braunschweig.Hannover,7okm from Braunschweig,
has an Airport,where I could pick up you with my car.Esther and you

are alwys our welcome guests and I should like to show you my lab

and to speak with you over the progress of my scientific work.

All my experiments with strain Be reveal difriculties tc get clear
cut putritional mutants,but because this strain is very convenient for
the connection of genetical and morphological work with regard to his
large cells I must insist to get useful forms.I have another Agrobac-—
terium strain,his cells are much smaller than B,,but it is much easier
to induce mutants with UV irridiation and select them with your methods.
Now I have an streptomycin resistant and an amino acid auxotroph form
and I will get some other mutants in the next time.So I think toja—m
perform new recombination experiments during this year.

Many thanks to Esther and you for your seasods greetings and your
good wishes from Stockholm.

With best regards to isther from Barbara and Irene

I am sincerely yours

}

Enclosed some stamps for your

   
 

Ollection.