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. 



LECTURER ON PLANT CHEMISTRY IN THE UNIVERSITY OF LONDON, UNIVERSITY COLLEGE, AND 



ON CHEMISTRY, ROYAL GARDENS, KEW; FORMERLY LECTURER ON CHEMISTRY IN THE MEDICAL 



SCHOOL OF ST. MARY'S HOSPITAL, LONDON 



AND 



T. G. HILL 



A.R.C.S., F.L.S. 



READER IN VEGETABLE PHYSIOLOGY IN THE UNIVERSITY OF LONDON, UNIVERSITY COLLEGE , 



FORMERLY LECTURER ON BOTANY AT THE GOLDSMITHS' COLLEGE AND ON GENERAL BIOLOGY 



IN THE MEDICAL SCHOOL OF ST. THOMAS'S HOSPITAL, LONDON 



WITH DIAGRAMS 



THIRD EDITION 



LONGMANS, GREEN AND CO. 



39 PATERNOSTER ROW, LONDON 



FOURTH AVENUE & 30TH STREET, NEW YORK 



BOMBAY, CALCUTTA, AND MADRAS 



1921 



LIBRARY 



(UNIVERSITY OF CALIFOMfU 

 DAVIS 



