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On his work on lysosomes in connection with death of neuroblasts.
On Baltzer's 80th birthday.
On Baltzer's upcoming 80th birthday.
Short note on a recent publication by F. E. Lehmann on Physological Embryology.
Reply to publisher, considering bid, discussion of set-up of biolgrpahy of Hans Spemann
On visiting his brother in West-Germany.
On Lowenstein and his work on cell commmunication.
On the opening of Hamburger's new lab facilities. On Hamburger's upcoming talk at Rochester on "Embryonic beginnings of behaviour".
Proposing a Journal of Embryology. On his upcoming Jessup lectures at Columbia, on recent travels.
On his recent talk at the symposium of the New York Academy. On the situation at his department. General remarks on symposia in biology.
On his recent trips to South America and Europe. On Seidel's work on Mammalian Embryology and his institute near Hannover, Germany.