THE 



EVOLUTION THEORY 



BY 



Dr. AUGUST WEISMANN 



PROFESSOR OF ZOOLOGY IN THE UNIVERSITY OF FREIBURG IN BREISG.U 



TRANSLATED WITH THE AUTHOR'S CO-OPERATK >\ 



BY 



J. ARTHUR THOMSON 



REGIUS PROFESSOR OF NATURAL HISTORY IN THE UNIVERSITY OF ABERB l.l.N 



AND 



MARGARET R. THOMSON 



ILLUSTRATED 



IN TWO VOLUMES 

 VOL. I 



LONDON 

 EDWARD ARNOLD 



41 & 43 MADDOX STREET, BOND STREET, W 



1904 



All rights reserved 



