123 



Page. 



Van 't Hoff's law applies only to homogeneous 

 Systems. 



Chemical laws in the field of botany hâve 

 approximate value only. 



Perhaps the favourable influence of high tem- 

 pérature is a time-function. 

 Reply to the second publication of thèse writers. 



§ 16, Summary of results . '. 86 



APPENDIX : TABLES 89 



LITERATURE • .... 116 



TABLE OF CONTENTS 120 



