THE 



PHYSIOLOGY OF PLANTS 



A TREATISE UPON THE 



METABOLISM AND SOURCES OF ENERGY 



IN PLANTS 



BY 



DR. W. PFEFFER 



PROFESSOR OF BOTANY IN THE UNIVERSITY OF LEIPZIG 



SECOND FULLY REVISED EDITION 



TRANSLATED AND EDITED BY 



ALFRED J. EWART, D.Sc, PH.D., F.L.S. 



PROFESSOR OF BOTANY IN THE UNIVERSITY OF MELBOURNE 

 AND VICTORIAN GOVERNMENT BOTANIST 



WITH MANY ILLUSTRATIONS 

 VOLUME III 



OXFORD 

 AT THE CLARENDON PRESS 



M D CCCCVI 



