VUl 



CONTENTS 



Section 3. Embryology in the Seventeenth and Eighteenth Centuries page 125 



3-1. The Opening Years of the Seventeenth Century 1 25 



32. Kenelm Digby and Nathaniel Highmore 1 29 



3-3. Thomas Browne and the Beginning of Chemical Embryology 135 



3-4. William Harvey 138 



35, Gassendi and Descartes; Atomistic Embryology 1 56 



36. Walter Needham and Robert Boyle 1 60 

 3-7. Marcello Malpighi; Micro-iconography and Preformationism 166 

 3-8. Robert Boyle and John Mayow 169 

 3-9. The Theories of Foetal Nutrition 176 

 3-10. Boerhaave, Hamberger, Mazin 1 82 

 3-11. Albrecht v. Haller and his Contemporaries 1 88 

 3-12. Ovism and Animalculism 1 99 

 3- 1 3. Preformation and Epigenesis 205 

 3-14. The Close of the Eighteenth Century 215 

 3-15. The Beginning of the Nineteenth Century 220 



PART III 



General Chemical Embryology 



Preliminary Note 



Section i. The UnfertiUsed Egg as a Physico-chemical System 



1 . Introduction 



2. General Characteristics of the Avian Egg 



3. The Proportion of Parts in the Avian Egg 



4. Chemical Constitution of the Avian Egg as a Whole 



5. The Shell of the Avian Egg 



6. The Avian Egg-white 



7. The Avian Yolk 



8. The Avian Yolk-proteins 



9. The Fat and Carbohydrate of the Avian Yolk 



10. The Ash of the Avian Egg 



1 1 . General Characteristics of non-Avian Eggs 



12. Egg-shells and Egg-membranes 



13. Proteins and other Nitrogenous Compounds 



14. Fats, Lipoids, and Sterols 



15. Carbohydrates 



16. Ash 



231 

 232 

 232 

 232 

 236 

 242 



255 

 265 

 280 

 287 



294 

 302 

 306 

 321 



331 

 346 

 355 

 357 



