The development of the frog's egg : an introduction to experimental embryology / by Thomas Hunt Morgan.

  • Morgan, Thomas Hunt, 1866-1945.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: The development of the frog's egg : an introduction to experimental embryology / by Thomas Hunt Morgan. Source: Wellcome Collection.

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    ally avoided at times the discussion of the more theoretical problems arising from the experiment, for it seems to me that such discussions are out of place in a volume of this sort. Only the early stages of the development have been considered, because almost all of the experimental work on the frog’s egg has been done on the early stages, and also because I am more familiar with the development and with the experiments of this period. Moreover, the later stages have been recently most admirably described by Marshall in his Vertebrate Embryology. A few words of personal explanation may be added. For several years I have been collecting the material for the present volume, but as the literature is so extensive and as I have had other work to do first, I made but slow progress. In the summer of 1893 I set seriously to work, and owe much to the admirable facilities offered by the University of Berlin. I take pleasure in acknowledging my indebtedness to Geheimrath Professor Fr. E. Schulze for many privileges and kindnesses extended to me in Berlin. The work was continued irregu- larly during the winter of 1893-1894 while enjoying the oppor- tunities of the Stazione Zoologica in Naples. During the winter of 1894-1895 the material was brought together and in the summer of 1896 at Zurich the manuscript was almost com- pleted. I gladly take this opportunity to thank Professor Arnold Lang for many courtesies extended to me during two visits to Zurich. Dr. Driesch has most kindly looked over some of the chapters, and has made many valuable sugges- tions. Dr. H. H. Field has also examined a part of the manuscript and helped me in several directions. To Professor E. B. Wilson I am under heavy obligations, and owe much to his valuable suggestions and corrections. To Dr. H. Randolph I owe a debt of gratitude for kindly advice and criticism. I am also greatly indebted to Professor .Joseph W. Warren and to Professor E. A. Andrews for advice in con- nection with the revision of the proof.