63 



Two things are very obvious from this table: 



1°. that the reaction-time is not dépendent upon tem- 

 pérature between 10° C. and 35° C; 



•2°. that the reaction-time is longer when stimulating 

 during the presentation-time than it is after longer 

 stimulation. 



Thèse conclusions are not in harmony with the results 

 of Bach.') He found the reaction-time as well as the 

 presentation-time both dépendent upon température. As 

 to Avena this is certainly not the case; with regard to 

 Vicia Faba, the figures given by Bach are not sufficient 

 to prove it, because it is not possible to deduce from his 

 figures, whether or not the results obtained after différent 

 stimulation-times hâve been sufficiently differentiated. 



When comparing the reaction-times after différent sti- 

 mulation-times Bach has surely put together values that 

 should hâve been kept separate. His groups are too large, 

 and the number of objects in each group is too small, 

 and therefore the' différence in the reaction-times after 

 différent stimulation-times has been overlooked. 



My results concerning reaction-time are more in harmony 

 with Czapek's results,*) who found the same value for 

 the reaction-time at 15° C.. '20o C. and '25° C. 



1) H. Bach, 1907, p. 70. 

 2^ F. Czapck, 189S. 



