PIONEERS OF 

 EVOLUTION. From 



THALES TO HUXLEY 



With an Intermediate Chapter on the 

 Causes of Arrest of the Movement 



BY 



EDWARD CLODD 



AUTHOR OF "THE CHILDHOOD OF THE WORLD," "THE STORY 

 OF CREATION," "THOMAS HENRY HUXLEY," ETC., ETC. 



REVISED EDITION 



CASSELL AND COMPANY, LIMITED 



LONDON, PARIS, NEW YORK, TORONTO AND MELBOURNE 

 MCMVII ALL RIGHTS RESERVED 



