xiv CONTENTS 



Section i6. Vitamins in Ontogenesis page 1359 



[6-1. Vitamin A 1359 



[6-2. Vitamin B 1360 



[6-3. Vitamin C 1 360 



[6-4. Vitamin D 1 360 



[6-5. Vitamins in Mammalian Development 1 363 



[6-6. Vitamin E 1 365 



Section 17. Pigments in Ontogenesis 1368 



[7-1. The Formation of Blood Pigments 1 368 



[7-2. The Formation of Bile Pigments 137^ 



[7-3. The Formation of Tissue Pigments 1 375 



[7-4. The Pigments of the Avian Egg-shell 137^ 



[7-5. The Pigments of the Avian Yolk 1378 



[7-6. Egg-pigments of Aquatic Animals 1380/ 



[7-7. Melanins in Ontogenesis 13^^ 



Section 18. Resistance and Susceptibility in Embryonic Life 1383 



•I. Introduction 1 3^3 



•2. Standard Mortality Curves 1 3^3 



[8-3. Resistance to Mechanical Injury ^3^5 



$-4. Resistance to Thermal Injury 1 388 



5-5. Resistance to Electrical Injury ^392 



[8-6. Resistance to Injury caused by Abnormal j&H 1 397 



5-7. Resistance to Injury caused by Abnormal Gas Concentrations 1 399 



(non-Avian Embryos) 



!-8. Critical Points in Development 1 409 



!-g. Resistance to Injury caused by Abnormal Gas Concentrations 1 4 1 4 

 (Avian Embryos) 



>-io. Resistance to Injury caused by Toxic Substances 1420 



••I I. Resistance to Injury caused by X-rays, Radium Emanation, 1 43 1 

 and Ultra-violet Light 



Section 19. Serology and Immunology in Embryonic Life 1444 



ig-i. Antigenic Properties of Eggs and Embryos ^444 



19-2. The Formation of Natural Antibodies 1446 



19-3. The Natural Immunity of Egg-white ^447 



19-4. Inheritance of Immunity in Oviparous Animals HS^ 



19-5. Serology and Pregnancy 1452 



19-6. Resistance of the Avian Embryo to Foreign Neoplasms 1 454 



