CONTENTS 



CHAPTER I. 



PAGE 



INTRODUCTORY: THE DARWINISM OF DARWIN AND OF THE 

 POST-DARWINIAN SCHOOLS i 



CHAPTER II. 

 CHARACTERS AS HEREDITARY AND ACQUIRED (Preliminary) 39 



CHAPTER III. 



CHARACTERS AS HEREDITARY AND ACQUIRED (Continued}. 



A. Indirect evidence in favour of the Inheritance of Ac- 



quired Characters 60 



B. Inherited effects of Use and of Disuse 95 



CHAPTER IV. . 



CHARACTERS AS HEREDITARY AND ACQUIRED (Continued). 



C. Experimental evidence in favour of the Inheritance of 



Acquired Characters 103 



CHAPTER V. 



CHARACTERS AS HEREDITARY AND ACQUIRED (Continued). 

 A. and B. Direct and Indirect Evidence in favour of the 



Non-inheritance of Acquired Characters . . . 133 

 C. Experimental Evidence as to the Non inheritance of 



Acquired Characters . . . . . .142 



