H // ^/ 



AN INTRODUCTION 



TO THE 



CHEMISTRY OF 

 PLANT PRODUCTS 



Vol. I. ON THE NATURE AND SIGNIFICANCE OF THE 

 COMMONER ORGANIC COMPOUNDS OF PLANTS 



BY 



PAUL HAAS, D.Sc, Ph.D. 



READER IN PLANT CHEMISTRY 

 IN THE UNIVERSITYrOF LONDON, UNIVERSITY COLLEGE 



AND 



T. G. HILL, D.Sc, A.R.C.S. 



READER IN VEGETABLE PHYSIOLOGY 

 IN THE UNIVERSITY OF LONDON, UNIVERSITY COLLEGE 



FOURTH EDITION 



WITH DIAGRAMS 



LONGMANS, GREEN AND CO. 

 LONDON ♦ NEW YORK ♦ TORONTO 



1928 





