HEREDITY 



By J. ARTHUR THOMSON, M.A. 



Regius Professor of Natural History in the University 

 of Aberdeen 



AUTHOR OF "THE STUDY OF ANIMAL LIFE," "THE 

 SCIENCE OF LIFE," "OUTLINES OF ZOOLOGY," " HER- 



BERT SPENCER, 



DARWINISM AND HUMAN LIFE, 



"THE BIOLOGY OF THE SEASONS," "INTRODUCTION 



TO SCIENCE," ETC.; JOINT-AUTHOR OF "THE 



EVOLUTION OF SEX," "EVOLUTION," ETC. 



SECOND EDITION 



3- 



O 



LONDON ^ b 



JOHN MURRAY, ALBEMARLE STREET, W. 



1912 



f-3 



