328 Mr. F. C.Webb on "Inductive Circuits/' or the 



tigated by M. Gaugain (fig. 3), we have inductive circuits formed 

 of a single resistance in each case ; and the quantities that can be 

 Fig. 1. Fig. 2. Fig. 3 



Fig. 4. 



accumulated from a given source on the two bounding surface s 

 of the dielectric composing this resistance will be equal and op- 

 posite in name, and inversely proportional to the resistance thus 

 forming the whole inductive resistance of the circuit. 



When both poles are connected to insulated conductors, then 

 two or more resistances exist in the circuit ; and as in the con- 

 ductive circuit the quantity passing any section in a given time 

 (i.e. the "magnitude," "intensity," or "quantity" of the current) 

 is inversely proportional to the sum of all the resistances in the cir- 

 cuit, so in the "mductive circuit" the quantity that will be accu- 

 mulated on any one surface of the resistances will be inversely pro- 

 portional to the sum of all the inductive resistances of the circuit. 



Thus, if S be a source, one pole of 

 which is connected to a flat plate A, 

 and the other to the plate B, and D 

 and C be two plates joined by a con- 

 ducting wire, then we have an induc- 

 tive circuit having two resistances, 

 viz. the dielectric separating D from 

 A, and that separating B from C. 

 The quantity on each of the plates 

 will be the same, notwithstanding 

 that one set of plates are larger and 

 closer together than the other, but 

 opposite in name on each successive plate ; and this quantity will 

 be inversely proportional to the sum of the two resistances. 



In the same way two Ley den jars of different sizes, or two 

 submarine cables of different lengths, attached to the two poles 

 of a source, will contain equal quantities ; and that quantity can 

 be determined by the simple formula for conduction, 



Q= 



E 



E + r 



where Q is the quantity in either jar or cable, and R and r the 

 inductive resistances of the jars or cable. 



Thus, if the plates are supposed equal and equidistant at first, 



