o 
' 
THE 
MUTATION THEORY 
EXPERIMENTS AND OBSERVATIONS 
ON THE 
ORIGIN OF SPECIES IN THE VEGETABLE 
KINGDOM 
BY 
HUGO DE VRIES 
PROFESSOR OF BOTANY AT AMSTERDAM 
TRANSLATED BY 
PROF. J. B. FARMER AND A. D. DARBISHIRE 
VOLUME II 
THE ORIGIN OF VARIETIES BY MUTATION 
WITH NUMEROUS ILLUSTRATIONS AND SIX COLORED PLATES 
CHICAGO 
THE OPEN COURT PUBLISHING COMPANY 
LONDON AGENTS 
KEGAN PAUL, TRENCH, TRUBNER & CO., LTD. 
1910 
