UNIVERSITY OF CALIFORNIA

DEPARTMENT OF ZOGLOGY
BERKELEY 4, CALIFORNIA

Oct. 26, 1960

Dear Josh:

i'm sorry to have been so slow to reply to your kind invitation
to visit Esther and you. Gertrude and I will be delighted and
are pretty free now that the girls are big. The date you set
was fine -—- Nov, llth, 12th?; don't Have your letter before ime,
Just let us know the time and the place.

Theagenda for the Westex meeting looks very interesting, May
I add a suggestion for an eathbound experiment that I8ve
discussed briefly with Carl Sagan, What is the stability of
DNA and proteins under sterile conditions in primitive sea water
at various temperatures? No use in forming the organic soupd if
they can deteriorate faster than they are formed, The
critical variabiléxyx in the accumulation of native high
polymers could be the thermal stability of milti-hydrogen bonds,

Best regards,

\ Cae

Yaniel “azia

i

Thit tearmapohptee wre
Than vy

Tlie
Nhe of hy 122,

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