Kosearclies on. the D'.seliarge of the Electric Org-an. 3y 



when the beginning of the opening-discharge appear.-^ later 

 than the summit of the discharge curve. Tliis show» that the 

 variation of tlie discharge-height with respect to tlie stimulation- 

 breadth is not tlie effect of the opening-stimulus, but is due to the 

 variation of the duration of the closing-stimulation current. 



Next we examined Oscillograms No. 40 and No. 41 (Plate 

 XVII.). These are a series of experiments on the same preparation 

 as No. 42 and No. 4o. In No. 40 the stimuli were given in 

 the decreasing order of Ijreadtli and in No. 41 in the reverse order. 

 For the breadth of the stimulus in this case, we took the breadth 

 on the bottom of the grapli, for the measurement as in No. :)7 was 

 very difficult to ascertain accurately. In this case, it was found 

 that the heights of the stimnli differed a little from one another. 

 Since the small differences in the heiglits of the stimuli exceeding- 

 l.y influence the heights of the discharges, the latter were reduced 

 into those corresponding to their respective stimuli having an 

 equal height 44d mm. The proportional constants in these 

 calculations were derived from the mean curve of No. 42 and No. 

 43. Here the stimulation-apparatus did not work well on account 

 of the contraction of the wooden part, by which the two rails were 

 bent a little. So the l)readth of the stimuli did not decrease 

 regularly. IMoreover, on plotting the points on a section paper, it 

 becauie clear that some progressive change had occurred during 

 the experiments, so that the points on the figure arranged them- 

 selves in a very complex manner. Therefore we assumed a fatigue 

 factor e~"% where n represents the number of the order of a dis- 

 charge, the first discharge being regarded as zero. The numbers 

 observed and calculated are given in the next table and the graph 

 is represented in Plate XL, Fig. 2. 



Tahli: XIV. 



Oscillograms No. 40 and No. 41. 



Temperature of the organ : 11-5 °C. 



Formula used in calculation: 



No. 40, 7/ = 48 0xl0-3""«""'[l-10-»-3^-^^'-^î], 

 No. 41, y = 4G 9xlO-°-^°«°="[l-10-"-o^-^^'-°']. 



