THE QUANTITATIVE 

 METHOD IN BIOLOGY 



BY 



Julius MacLeod, Dr Nat. Sc. 



Professor of Botany in the University of Ghent 



WITH 27 FIGURES 



MANCHESTER : 



AT THE UNIVERSITY PRESS 



12 LIME GROVE, OXFORD ROAD 



LONGMANS, GREEN & CO. 



LONDON, NEW YORK, BOMBAY, ETC 



1919 



