people
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Replies to Rita Levi-Montalcini questions about PNAS paper
Discussions of research by others. Travel updates.
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On a recent autobiographical article by Holtfreter and possible publishers. On Tiedemann. On Hamburger's recent work on NGF.
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On the differentiation of a multicellular organism. On Spemann's organizer. On the status of embryology: "The prominent position of embryology, held for 50 years previously, has been lost." On the critical reception of Weiss.