CONTENTS 



Section 2. On Increase in Size and Weight 

 2-1. Introduction 

 2*2. The Existing Data 

 2-3. The General Nature of Embryonic Growth 

 2-4. The Empirical Formulae 



2-5. Percentage Growth-rate and the Mitotic Index 

 2-6. Yolk-absorption Rate 

 2-7. The Autocatakinetic Formulae 

 2-8. Instantaneous Percentage Growth-rate 

 2-9. Growth Constants 

 2- 10. The Growth of Parts 

 2*11. Variability and Correlation 

 2-12. Explantation and the Growth-promoting Factor 

 2-13. Incubation Time and Gestation Time 

 2-14. The Effect of Heat on Embryonic Growth 

 2-15. Temperature Coefficients 

 2 • 1 6. Temperature Characteristics 

 2-17. The Effect of Light on Embryonic Growth 

 2- 18. The Effect of X-rays and Electricity on Embryonic Growth 

 2' 1 9. The Effect of Hormones on Embryonic Growth 



page 368 

 368 



369 



389 

 399 

 405 

 408 

 420 



434 

 440 



455 

 460 

 470 

 498 

 503 

 515 

 533 

 536 

 538 



Section 3. On Increase in Complexity and Organisation 



3-1. The Independence of Growth and Differentiation 



3-2. Differentiation-rate 



3-3. Chemical Processes and Organic Form 



3-4. The Types of Morphogenetic Action 



3-5. Pluripotence and Totipotence 



3-6. Self-differentiation and Organiser Phenomena 



3-7. Functional Differentiation 



3-8. Axial Gradients 



3-9. Organised and Unorganised Growth 



3* 10. Chemical Embryology and Genetics 



541 

 541 

 544 

 552 

 559 

 567 

 570 

 580 

 582 

 606 

 608 



VOLUME II 



Section 4. The Respiration and Heat-production of the Embryo 615 



4- 1 . Early Work on Embryonic Respiration 6 1 5 



4-2. Respiration of Echinoderm Embryos in General 623 



4-3. Rhythms in Respiratory Exchange 641 



