Although this is basically a translation of the second German edition published in 1970, more recent experimental findings have, in several instances, been incorporated into the text. Furthermore, we have tried to explain some of the experiments, and their possible interpretations, in a more precise way. I am very grateful to Dr. David Turner; in addition to translating the text, he was able, thanks to his experience in developmental biology, to suggest a number of improvements in the course of our collaborative discussions. Zurich, Spring 1974 ERNST HADORN Preface to the Second German...
Although this is basically a translation of the second German edition published in 1970, more recent experimental findings have, in several instances,...
