Correspondence
Handwritten postcard
Discussion about whether Ernst Haeckel was a materialist or idealist; updates on the Birkhauser collection.
Letter about Carson's work with Drosophila
On his difficulties to write papers in English. Thank-you note for reprints.
Letter about Hamburger's article on Cajal and Harrison
Letter from Hawaii about Carson's election to the academy [National Academy of Sciences?]
Letter turning down Hamburger's offer of a set of books
On their book manuscript and the chapter on cell behaviour.
Typewritten letter, 3 pages, signed 'Wally'
Michael Fox writes to professors a Washington University to notify them of his resignation from the university
On working with Amphibian eggs provided by Twitty, Male and Ballard. On producing neuralization in ectoderm by changing the salt comcentration, the ph, or the Ca content of the solution.
On the plan to publish a collaborative book on "Analysis of Development" with Weiss et al. On his upcoming papers on cell polarity & mechnaics of neuralization. On Roy Gillettte.