100 Prof. E. Edlund on Galvanic Resistance as 



A. 

 631-3 

 631-5 

 631-5 



B. 



629-0 

 629-0 

 629-0 



D. 

 2-3 

 2-5 

 2-5 





Mean . . 



2-4 



lverted 



; the rest of the arran^ 



jemei 



A. 



632-0 

 631-9 

 631-9 



B. 

 634-0 

 634-0 

 634-2 



D. 

 2-0 

 2-1 

 2-3 



Mean . . 2'1 



Consequently this series gives the same result as the first — 

 namely, that the resistance to galvanic conduction is diminished 

 if the conductor moves in the same direction as the galvanic 

 current, but it is increased if the two go in opposite directions. 



In all these experiments the velocity of the distilled water 

 was between 9 and 10*5 metres in a second. 



Experiments with alcohol containing by volume 24 per cent. 



water. 



With this liquid the experiments were conducted in the same 

 manner as with the distilled water, and led to the same result ; 

 it might therefore be superfluous to describe them here. 



Experiments with water from the town-supply. 



An experiment was made which showed that the resistance 

 of distilled water is about fifty times as great as the water from 

 the conduit. A glass tube in all respects like the one before 

 described was screwed on to the water-pipe in a vertical posi- 

 tion. The connexions between the gold disks in the side-tubes, 

 the electromotor, and the magnetometer were arranged in the 

 same way as in the preceding experiments. The only differ- 

 ence with the observations was, that, as the supply of liquid 

 was unlimited, the constant deflections were observed instead 

 of the scale-division at which the magnetometer-needle began 

 to return. By special experiments, in which no electromotor 

 was inserted between the middle disk and the binding-screws 

 g and h, I convinced myself that no galvanic current arose 

 from the water out-flow alone. Therefore no extraneous cause 

 of a galvanic current was present to produce a deflection of the 

 galvanometer-needle. 



As the water from the conduit was, in comparison with dis- 

 tilled water, a good conductor, it was to be expected that the 

 polarization of the disks would here exercise a greater influence 



