CHAPTER 13 



CHAPTER 14 



CHAPTER 15 



CHAPTER 16 



CHAPTER 17 



CHAPTER 18 



CHAPTER 19 



CHAPTER 20 



CHAPTER 21 



CHAPTER 22 

 CHAPTER 23, 



CHAPTER 24 

 CHAPTER 25 



The Discovery of Embryonic Layers : The 237 

 Dissertation of Kh. I. Pander 



Outline of the Life and Scientific 2 ?5 



Activities of Karl Maksimovich Baer 



Baer's Treatise De ovi mammalium et 285 

 hominis genesi 



Appearance and Significance of Baer's 301 

 Main Work, Uber Entwicklungsgeschichte 

 der Thiere 



First Part of Uber Entwicklungsgeschichte : 309 

 Development of the Chicken in the Egg 



Second Part of Uber Entwicklungsgeschichte : 339 

 Scholia and Corollaries to the History of 

 Chicken Development in the Egg 



Theoretical Introduction to the Second 365 

 Volume of Uber Entwicklungsgeschichte 



Third Part of Uber Entwicklungsgeschichte : 373 

 Development of the Bird Egg and Embryo 



Third Part of Uber Entwicklungsgeschichte 405 

 (continued) : Development of Reptiles, 

 Mammals and Animals Deprived of Amnion 

 and Yolk Sac 



Fourth Part of Uber Entwicklungsgeschichte : 441 

 Studies on the Development of Man 



Baer's Teratological Works and Embryological 453 

 Reports, Related to the Period of Work in 

 Petersburg 



On the Question of Baer's Theoretical Views 489 



Investigations of Invertebrate Embryology: 513 

 Work of A. Grube, A. D. Nordmann, 

 N. A. Warnek, and A. Krohn 



IV 



