241 



After having been convineed that the short tubes do 

 not give satisfactory resuUs, though they had been washed 

 with sulph. acid. conc. and afterwards wlth dist. water they 

 were exchanged for a longer tube of 



25,5 cm (-Li). 



With this tube was made a series of experiments, in 

 which the same order was followed as before; the distance 

 of the point was in 28,3 cm from the meniscus, 6,8 cm 

 from the upper end of the tube, 33,7 cm from the water- 

 surface, the cap. height 5,4 and the transported quantities were 



1° 2,12 mg 2° 1,51 mg 3° 1,28 mg 4° 0,56 mg. 



After that all effect seemed to cease, but on a closer 

 examination there appeared here and there in the tube half- 

 drops, the length of which was estimated at 1,5 mm. At 

 the same time it was detected that the dröps, after the in- 

 terruption of the current, were magnified and that new 

 dröps were formed. 



On this account the measuring of the dröps was not 

 undertaken before an interval of 3,5 minutes after the cur- 

 rent had ceased to work. 



Because the quantity of water drawn up by the cur- 

 rent depends on time, a close investigation of it was un- 

 dertaken with the same tube L^. 



See Table of Obs. Series II. 



Hereafter the tube L^ was exchanged for a new tube 



L^ of the same dimensions and instead of distilled water, 



which had been used hitherto, water from the aqueduct 



was taken for the vessel and the tube. The results were: 



See Table of Obs. Series III. 



From this series it seems that the transported quantity 

 of water is, up to 2 minutes, proportional to the time. 



Between the two series there is a great difference in 

 so far that the number of sparks in the latter is more than 

 twice greater than in the former. This proportion tells us 

 that the conducting power by use of water from the aque- 

 duct has been more than doubled. As the drawn up water- 



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