Se

my

tember 30, VX

Dre Ce Be van Niel,
Hoprdns Uarine Station,
Pacific Grove, Onlil.

Dear Or. van Niel:

Nerewith, I am returning the renrints of Pijper's panern on
diffraction of bacterial cultures. Thank you very much for calling
them to my attontion. I ean't say tiat Ian strongly convinced by
his arguzent thet bacteria ore standing on end. It should bo no dif-
ficult task with a phase microscope to check this diroctly.

Misa Lively mentioned that the recombination oxperinent wor!od
satisfactorily. I should be pleased to hear your coments or sugzes-
tion: as to how it misht best be adapted for pedagogic purposes.

Youra sincerely,

Joshua Lederberr,
Aoseciate Trofescor of Cenotics

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