CONTENTS 



CHAPTER PAGE 



I. Introduction i 



II. Some Famous Racers and the Problems They 



■Suggest 4 



III. Male and Female 19 



IV. Some Laws or Heredity 30 



V. Man a Creator 46 



VI. The Visible Basis of Heredity .... 66 



VII. Some Apparent Exceptions 86 



VIII. Are Acquired Modifications Heritable ? . loi 



IX. The Inheritance oe Human Characters, 



Physical and Mental 122 



X. The Practical Problem of Human Heredity 147 



Appendix: Books eor Reference or Further 



Reading 156 



Index 159 



