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On his revision of the Vertebrate Embryology article in Encyclopaedia Britannica.
On his invitation to Woods Hole he received from Hamburger. Short note on Paul Weiss. Probaby attached a 2-page proposal by Twitty on the exchnage of amphibian material for experimental embryology.
Handwritten letter, 3 pages
Twitty talks shortly about summer meetings in Bloomington.
On the second edition of St. Vincent School.
On Robert Barden and his work on the origin and development of the iris pigment.
Thank you letter for information regarding Anne Bekoff's professional qualifications
Typewritten letter
Twitty is requesting a letter of recommendation for Dr. Sperry.
On Hamburger's historical account of Spemann's work style in the November issue of "Experientia".
On keeping a frog colony in his Rochester lab. On frog development. Critical remarks on Locke's editorial work.
questions about the history of behavioral embryology