TABLE OF CONTENTS. 



Page, 

 INTEODUCTION 1 



S 1. Récent views on the influence of tem- 

 pérature on physiological processes . . 1 

 The optimum-curve analysed, D u c 1 a u x. Cohen. 

 Kanitz. Blackman. The concept reaction - 

 velocity in physiology. Van 't Hoff's law. The 

 optimum variable with the time of observation. 

 Limiting factors. 



Miss Matthaei, Smith, Bail s, Blackman,. 

 Kuyper, van I ter son and Miss van Am s tel. 



§2. Preliminary investigations on the in- 

 fluence of température on geotropism . 11 

 Czapek, Bach, Haberlandt, Darwin. 

 Psychroklinic, Vôchting, Lidforss. 

 Mail le fer. 



§3. Object ofthe présent investigation. . 14 

 Tracing the influence of température on geotro- 

 pism with the aid of Blackman's theory. 

 Brief account of methods. 

 CHAPTER I. METHOD 15 



§4. De t ai le d description of the me thod . . 15 

 Manner of warming. 

 Scope of the investigation. 



Number of experiments and numberof plants used. 

 Numbering of experiments. 

 Description of an experiment in détail. 



