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Ue DEUTSCHE AKADEMIE DER WISSENSCHAFTEN ZU BERLIN

INSTITUT FUR MIKROBIOLOGIE UND EXPERIMENTELLE THERAPIE JENA

DIREKTOR PROF. DR. MED HANS KNOLL JENA+BEU TEE ENBERGSTRASSE 114

Jena, June 20, 1958
Tck/Schro

Dear Professor Lederberg,
Thank you very much for your letter of June 13.

I am very sorry that the matrices arrived in such a bad manner.
I shall give you some matrices at the Stockhom congress. If you,
then, find them to be of any use for you, I shall tell you all

about commercial description.

In the meantime we succeeded in the production of a numbered
matrix. We have now ten thousand squares (length of the edge

60 ») with four numbers in every field. I include a microphoto-
granm of a microculture on agar inoculated with Bacillus sub-
tilis. The slide sulture is covered by a coverslip which carries
the Formvar-replica of the new matrix. This .development has been

done in connection with the Zeiss works.

Sincerely yours,

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Y. TausenecK
Enclosure

Dt Mo Atvees
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RUF: 3551 - DRAHTWORT: IMET: BANKKONTO: DNB JENA 1120610/3 / FERNSCHR-NR. KENNZAHL 058 - RUF-NR. 208