KENNE"LLY. — OSCILLATING-CURRENT CIRCUITS. 419 



Pm' P, P Undamped maximum cyclic power developed by condenser, 



undamped instantaneous value of same, and damped in- 

 stantaneous value of same (watts). 

 pi, pi Undamped and damped instantaneous values of power in 



inductance (watts). 

 Pr, Pr Undamped and damped instantaneous values of power 



developed by condenser in the resistance of an o. c. 



circuit (watts). 

 p' = ei Instantaneous power of the emf. of self-induction (watts). 

 2pr, 2pr Total undamped, and total damped, intantaneous values of 



power developed in the resistance of an o. c. circuit by 



condenser and inductance combined (watts). 

 Qo. q^ Initial charge in a condenser (coulombs). 



Qq Initial vector amplitude of electric charge in condenser 



(coulombs /. ). 

 Q = Qq/\/2, the r. m. s. value of the initial vector amplitude 



(coulombs). 

 Qi Initial charge of one among several condensers in series 



(coulombs). 

 q Instantaneous charge in condenser (coulombs). 



qg Quantity required to flow through an o. c. circuit in order 



to establish p. d. equilibrium (coulombs). 

 / Joulean resistance in an o. c. circuit (ohms). 



/' Hertzian resistance in an o. c circuit (ohms). 



r = 7-' + r" Total resistance in an o. c. circuit (ohms). 

 r. m. s. Square root of mean square of an oscillatory quantity. 

 p = r/2, Semi total of resistance in an o. c. circuit (ohms). 



$Q Total initial magnetic flux linked with a discharging circuit 



counting all of the turns in the same (volt-seconds). 

 <fi Phase angle in an o. c. circuit, and angle of a spiral 



(radians or degrees). 

 \f/ Phase angle in an ultraperiodic circuit (radians or degrees). 



gd~^ij/ Antigudermannian of a circular angle, or the hyperbcl^r 



angle of which if/ is the gudermannian (hyp. radians). 

 s, Si, $2, S3, = 1/c, elastance of a condenser, or of each of several 



condensers (darafs). 

 t Elapsed time from the release of an o. c. system (seconds). 



ti Time interval (seconds). 



T Period of an o. c. circuit (seconds). 



T = l/p, Oscillation time-constant of an o. c. circuit 



(seconds). 



