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Discussion of upcoming National Academy meeting
On Holtfreter's & Hamburger's book manuscript, on Weiss.
On Hiroko Holtfreter's NSF grant. On Spemann.
On his book of alpine flowers. On his plan to write an article on 'A common regulation for Embryonic Induction and Cell Type Conversion?'
On his visit to Woods Hole. Mainly private letter.
On NGF findings.
Critical comments on "Analysis of Development".
Sending a paper on the ear and nose, dealing with remarks by Hamburger on the polarity of the ear.
On the interchanges between nerves and end organs.
Updates on travel
Review of "Analysis of Development".
On his alternative views of cell biology and developmental biology. On his intellectual legacy.