H 



AN INTRODUCTION 



TO THE 



CHEMISTRY OF 

 PLANT PRODUCTS 



BY 



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 OP ST. THOMAS'S HOSPITAL, LONDON 



AND 



T. G. HILL 



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



READER IN VEGETABLE PHYSIOLOGY IN THE UNIVERSITY OP LONDON, UNIVERSITY COLLEGE; 



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



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



WITH DIAGRAMS 



SECOND EDITION 



LONGMANS, GREEN AND CO. 

 39 PATERNOSTER ROW, LONDON 



FOURTH AVENUE & 30ra STREET, NEW YORK. 



BOMBAY, CALCUTTA, AND MADRAS 



1917 



