CONTENTS 
BOOK I. 
The Transmutation of Species by means of Natural 
Sélection :—Is it possible ? 
CHAPTER I. page 
THE THEORY DEFINED AND TESTS PROPOSED - - I 
CHAPTER II. 
DIFFERENCES OF DEFINITION 8 
CHAPTER III. 
DIFFICULTIES INHERENT IN THE THEORY 25 
CHAPTER IV. 
THE THEORY COMPARED WITH THE REALITY - - 42 
(a) Is the tendency to increase in a geometrical 
ratio followed by discriminative destruction ? - 43 
(b) Blindfold death 59 
(c) “ On the whole” and “ In the long run ” - 71 
CHAPTER V. 
THE THEORY COMPARED WITH THE REALITY (Continued) 76 
(d) Competition modified by co-operation - - 76 
CHAPTER VI. 
THE THREE STRONGEST ARGUMENTS - - - - 103 
(a) The conflict between race and race - - 103 
(b) No organ or instinct exists for the sole benefit 
of another species 119 
« (c) The analogy between Natural and Artificial 
Selection 130