AN INTRODUCTION 



TO THE 



CHEMISTRY OF 

 PLANT PRODUCTS 



PAUL HAAS 



D.Sc, Ph.D. 



LECTURER ON CHEMISTRY, ROYAL GARDENS, KEW, AND IN THE MEDICAL SCHOOL OF ST. MARY'S 



HOSPITAL, LONDON ; FORMERLY DEMONSTRATOR OP CHEMISTRY AND TOXICOLOGY IN THE MEDICAL 



SCHOOL OF ST. THOMAS'S HOSPITAL, LONDON 



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 



SECOND EDITION 



LONGMANS. GREEN AND CO. 

 39 PATERNOSTER ROW, LONDON 



FOURTH AVENUE & 30th STREET, NEW YORK. 



BOMBAY, CALCUTTA, AND MADRAS 



I917 



