MEASUREMENTS AT TELEPHONIC FREQUENCIES. 107 



_|-yi3.6= 14.07 Z 75°.2 milliamperes, at 525^, Fig. yh. As the 

 capacitance in the condenser c, Fig. "ja, is increased from o to in- 

 finity, the current locus goes over the circular path mlpk, Fig. yh. 



^/6 chm 





Osc.7?. 



3 





mdr^ 



r 



p f 



Fig. Ta. Circuit of inductance, resistance, and. capacitance, where one part of 

 the inductance is bridged by a variable condenser c. 



Fig. 7&. Locus for the main current in the circuit of Fig. ^a, the con- 

 denser c being varied from o to i^, and the impressed e.m.f. being maintained 

 constant, at 525'—. 



The phase of the e.m.f. induced in the coil L, Fig. ya, is represented 

 by the vector Ok, Fig. yh. 



