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request for reprints, discussion of rhythmical behavior in the chick embryo and many questions posed on the subject
On his birthday and christmas. On Hamburger's upcoming visit to Boston.
Letter accompanying two diagrams by Yip on cell degeneration.
Reply to a letter sent by Viktor Hamburger on February 1, 1982.
On the mediation by cell-cycle progression of cell-type differentiation. "I feel that embrologists do not ike to point out that their subject is contradictory to an idea favoured by molecular biologists. What I am proposing does not contradict any molecular biological principles, but it is something which would not be expected by molecular biologists.' On mesodermalization of amphibian ectoderm in realtion to experiments performed by Helmut Sauer.
Season's greetings
