v" 



CONTENTS 



PACK 



INTRODUCTION 9 



CHAP. 



I. WHY LIKE BEGETS LIKE . . . .12 



U. VARLA.TION 18 



III. THE NATURE AND CAUSES OF VARIATION . 25 



IV. THE INHERITANCE OF ACQUIRED CHARACTERS 33 

 V. INHERITANCE IN PURE LINES ... 45 



VI. INHERITANCE ON CROSSING — MENDEL's LAW 49 



VII. 3IENDELISM (continued) 59 



Vm. MENDELISM — GENERAL DISCUSSION . . 68 



IX. THE STATISTICAL STUDY OF HEREDITY . . 75 



X. THE PROBLEMS OF THE PRACTICAL BREEDER 82 



XI. EUGENICS 87 



A COURSE OF READING ON HEREDITY . . 91 



I^DEX 93 



