﻿48 Prof. E. Edlund's Experimental Proof that 



Experiment 14. Knobs of iron. 



A. B. 



3130 294-5 



3130 294-5 



3130 Mean . 294-5 

 3153 



Mean . 313-6 

 The deflection amounted therefore to 19*1 divisions. 



Experiment 15. Knobs of tin. 



A. B. 



313-5 295-8 



314-0 296-0 



313,5 Mean . 2959 



Mean . 313'7 



The deflection amounted thus to 17*8 divisions. 



The reason why the deflections were smaller than before was, 

 that the resistance in the bridge only consisted of the rheostat 

 wire m, in consequence of which the greater part of the electric 

 discharge took this path. The distance between the knobs must 

 therefore be small if the sparks are to jump across. 



Series 5. Polarization of platinum disks. 



A polarization-vessel was introduced between i and k instead 

 of h. While the disk was being turned, and the current there- 

 fore passed through the liquid in the vessel, the galvanometer G 

 was removed. After a definite time the machine was made in- 

 active by directly connecting the combs a and b. Thereupon the 

 galvanometer-wire was connected as rapidly as possible with the 

 polarization-vessel, and the successive positions of equilibrium of 

 the magnetic needle were observed. 



Experiment 16. No sparks formed between / and g. The 

 position of equilibrium of the needle before the experiment 

 = 219'0. The successive positions of equilibrium after polariza- 

 tion were 215-0, 217-5, 217-5, 218-0. The greatest deflection, 

 therefore, was =4 divisions. 



Experiments. Formation of sparks between / and g. The 

 position of equilibrium of the needle before the experiment was 

 = 219*0. The successive positions of equilibrium after the po- 

 larization were 192 -5, 209-0, 213-0,214-5, 215-5, 215-6, 215-5, 

 216*5, 217*0. The first observed position of equilibrium, after 

 connecting the platinum disks with the galvanometer, was at 

 26-5 divisions. 



