BY G. ARCHDALL REID, M.B., F.R.S.E. 



With a Diagrammatic Representation 



BY HERBERT HALL TURNER, 



Savilian Professor of Astronomy, Oxford 



Cloth, 8vo, xi + 548 pages, $j.jo net; by mail, 



The question of heredity is one of vital concern to every liv- 

 ing being, and any light thrown on the subject by scientific investi- 

 gations and experiments is of momentous interest to the human 

 race. It is therefore of the utmost importance that every one 

 should have some knowledge of the theories advanced by those 

 who believe in the immutability of the laws of heredity, and also 

 how far these have been proven modifiable by environment and 

 education. 



The present volume is a discussion of the entire subject, 

 covering a much wider area than the author's " The Principles of 

 Heredity," and presenting the facts and arguments in a scholarly 

 and yet clear and non-technical manner ; the aim being to make 

 it comprehensible to the general reader, as well as to the scientific 

 investigator. 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New Tork 



