188 



Dr. A. D. Waller, (hi th 



[July 17 



the magnitude of its exciting cause. The response appears to depend 

 on energy rather than on quantity of electrical stimulus : plate 1948 

 taken on the 8th egg ( ICS hours) shows this point even more elearh , 

 The same chick was used for examination of the influence of 

 temperature. 



Arithmetic Increase of Quantity and Geometric Increase of Energy by 

 increasing Voltage at Constant Capacity. 



5 mf . 



2 *8 volts. 



14 mc. 



200 ergs. 



"0005 volt . 



5 s , 



| 5-6 „ 





800 „ 



-0011 



o 



8'4 „ 



42 „ 



1800 „ 



0*0013 „ 



1340. | 



l i i j 



io 20 sotruns. 



