314 



Dr. Sumpner and Mr. Phillips on a 



holds necessarily in the three cases oh' figs. 2, 4 and G ; but a 

 troublesome special adjustment is needed in the case of fig 3; 

 while in the cases of figs. 5 and 7 the adjustment for steady 



Fiff. 2. 



W/WVVWWh-AA/WW 



Kft^KA. 



Fiff. 3. 





l 2 r t 



M/WWV 



^^iW-A/WWV 



AAAAA/V- 1 



11,+r, K;+r_; 



Fiff. 4. 



M, 



M 



^3_£ — ^i^M/WWV— 



imr 



s 



r z 



M/WV\Ar- 1 - J VVW\Ar J 



M, 



M 



R 1+^1 E 2+^ 



currents is impossible. In these figures capacities, self- 

 inductances, and mutual inductances are respectively denoted 

 by the letters K, L, M ; resistances are indicated by the 

 letters R, r, and S ; while the indicator is denoted by m.c. 



