47 



Several tables were obtained in this way for each tem- 

 pérature. Now ail thèse tables arc reproduced as appendix 

 at the end of this paper and every experiment may be 

 found there. They are not however suited to give a clear 

 idea of the altérations of the presentation-time as a 

 function of température and of time of preliminary war- 

 ming. To obtain this end the last columns but one of 

 thèse tables hâve been collected into one table for each 

 température. In this way the tables I — XIV were obtained 

 and follow hère. To each of thèse tables belong the tables 

 with the same number in the appendix. Thus e.g. the 

 table IX owes its origin to the tables IX A, IX B, IX C, 

 IX D, IX E and IX F. Thèse tables I— XIV give the per- 

 centage of curved plants at each température after a 

 varying duration of preliminary warming. At the bottum 

 of the columns, relating to a definite time of preliminary 

 warming, the presentation-time is given for the expéri- 

 mental condition mentioned at the head of the column. 



Two tables are given for 0° G. and for 20° C, as expe- 

 riments were made at thèse two températures before and 

 after the change in conditions, spoken of in § 8 B. The 

 tables I and II were used as well as VI and VII to fix 

 the factor "/g, by which the presentation-times at the 

 bottom of the tables III — V and XI — XIV had to be 

 multiplied. 



In order to find the mean of the percentage of curved 

 plants the total number of plants has always been used. 

 Thus for instance, if the mean was to be found of two 

 experiments, one with 50 plants of which 15 curved 

 (i. e. 30 o/o), and another with 150 plants of which 75 

 curved (i. e. 50 o/^), the mean was taken as 90 of 200 

 (i. e. 45o/o) and not the mean of SOû/^and 50o/o (i. e. 40o/o). 



