﻿24 Prof. E. Edlund on the Electromotive Force 



Deflections, 

 75 

 8-0 

 7-8 

 7-0 

 80 

 7^ 



Mean . . 7'6 

 Intensity of the current = tg. 45° 45'. 



Experiment 8. — The same wire, platinum-copper, as in the 

 foregoing experiment. 



Deflections. 

 11-0 

 12-2 

 80 

 13-3 

 9-7 

 12-0 



Mean . . 11*0 

 Intensity of the current = tg. 55° 45'. 



Experiment 9. — This experiment with the platinum-copper 

 wire was made a day later. 



Deflections. 

 7-2 

 7-0 

 80 

 6-8 

 <r5 



Mean . . 7*1 



Intensity of the current = tg. 45° 30'. 



If the mean be taken from experiments 7 and 9, we obtain 

 the deflection 7*4 for the intensity = tg. 45° 38'. The experi- 

 ments may be calculated from the formula #=7 , 37tg.v, from 

 which we obtain : — 



Calculated. Observed. 

 Experiment 8. . . . 10'82 11*0 



7 and 9. . 7'54 7*4 



Experiment 10. — This experiment was made with a wire of 

 German silver and copper soldered with tin. The German-silver 

 wire was 1 millim. in diameter. When the positive current went 

 from the German silver to the copper at the point of contact, a 

 cooling resulted. 



