245 



See Table of Observations Series VII and VIII. 



Both these series are laid out in curves Pl. III and 

 Pl. IV. The curve a h c cl e represents on both plates the 

 drawn water quantities and the curve f g li i the inten- 

 sity through the corresponding number of sparks. From Pl, 

 III it seems that a maximum appears when the point is at 

 distance of 25,8 cm from the meniscus, followed by a mini- 

 mum at 26,0 cm, after which foUows a second, but much 

 smaller, maximum at 29,2. 



The intensity-curve shows an irregular course at 25,8, 

 attains minimum at the same time as the waterquantity or 

 at 26,8 to attain again maximum at 29,2. A nearly equal 

 course shows the curves on Pl. IV, though not so distinctly. 



As by these series the distances were varied with the 

 purpose of detecling these variations, the presence of which 

 was made known during the experiments, they must be re- 

 garded as real and not accidental. They can depend on 

 either wavy propagalion of the electricity from the point 

 to the cap. tube or of the way in which the current is 

 going in the tube, after the different distances, at which 

 the point is situated. At distances surpassiog 29,2, both 

 curves retain the same course as before by the tube L^ 

 Pl. II. 



§ 5. After that all the surrounding objects, which pos- 

 sibly could have any effect upon the passage of the elec- 

 tricity through the air-layer between the point 5 and the 

 watersurface, had been taken away, a series of experiments 

 was executed with the new tube L-^ (28,6 cm long, 0,4 5 in 

 diameter and the lacing in by 10,2 cm from the lower end). 

 See Table ot Observations Series IX. 



In this series taken on different days the concord is 

 less than before. The curves of the drawn water quantities 

 a h c de and of the intensity fg h i Pl. V do not follow each- 

 other. The former shov^^s a minimum at the distance of 

 34,6 and max. about 39,6, the låter min. at 39,6 and max. 

 at 41,0. Generally both the curves show the dependence 

 of the water quantity of the intensity of current as before. 



