Eesearclies on the Discliarçre of the Electric Ororau. 



47 



Tai-.le XIX. 



Oscillogram No. 05. 



Temperature of the organ: lo-5 °C. 



The general course of the curve is similar to the preceding. 

 On the right liand side, the arrangement of the points is not so 

 regular as in No. 74 — No.?'), especially the position of the last 

 point in the figure deviates exceedingly from the others. But 

 on examining the oscillogram, we see that the second discharge 

 occurs after the secondary discharge of the first. Thus the second 

 stimulus was influenced l)y the first discharge which acted as a 

 preceding stimulus. Here we may find that M = 3 00, ;. = 376 and 

 the refractory period=4G-0x 10"* sec. The values of y calculated 

 from these constants are plotted on the figure. The interval of 

 time, in which the value of y l)ecomes one half, may be called the 

 2)eriod of recovery of the temporary fatigue. In the preceding two 

 experiments the period of recovery is equal to 17-0 x 10"* sec. in 

 the former and 18-5 x 10"* sec. in the latter, tlie temperature being 

 14-5 °C. and 13-5 V. respectively. 



With respect to the height of the second discharge, we may 

 remark that it decreases with the decreasing interval l)etween the 

 two stimuli. But, if we take tlie ratio of the height of the second 



