40 KENNELLY AND KUROKAWA. 



List of Symbols employed. 



Force factor of a telephone receiver (dynes/absampere Z ). 



"1 +ia2 Linear hyperbolic angle of an electric or acoustic conductor 

 /hyps ^ \ /hyps ^- 



\ km. / \ cm. 



/3° Slope of force factor, or of a vector quantity (circular degrees). 



c Linear capacitance of electric conductor (farads/km.). 



7 = 1.41 Ratio of specific heats of air or other gas (constant pressure 



to constant volume) (numeric). 



A Apparent damping constant of a telephone receiver (hyps/ 



second). 



op, 8a Position angles at point P and at sending end A, of electric or 



acoustic conductor (hyps Z ). 



E, Ep, E^, Eb Electromotive force in a circuit, at a point P on a conductor, 

 at sending end A, and at receiving end B (rms. volts Z ). 



e = 2.718. . . Napierian base (numeric). 



F Vibromotive force on a diaphragm; also at any surface across 



which vibration occurs (rms. dynes Z ). 



Fp, Fa, Fb Vibromotive force over section of acoustic conductor at P, at 

 sending end A or far end B (rms. dynes Z ). 



/ Impressed frequency (cycles per second). 



/ij/o Lower and upper quadrantal frequencies of telephone receiver 



(cycles/sec). 



/o Frequency of apparent resonance of a receiver (cycles /sec), 



g Linear leakance of electric conductor (mhos/km.) . 



g Coefficient of linear resilience loss of acoustic conductor (mech. 



absohms/cm.). 



6 = di + jOi Angle subtended by an electric or acoustic conductor (hyps Z ). 



I Current strength in a telephone receiver (rms. absamperes Z ); 



also current strength along an electric conductor (rms. am- 

 peres Z). 



j = V - 1 



ii Compression, or ratio of rms. diminution in volume to quiescent 



Pg volume (numeric). 



L Length of electric or acoustic conductor (km. or cm.). 



L2 Distance from point P to far end of an electric or acoustic con- 



ductor (km. or cm.). 

 S Linear inductance of electric conductor (henrys/km.). 



I Length of an electric conductor (km.) . 



1 Length of an acoustic conductor (cm.). 



X Wavelength on electric or acoustic conductor (km. or cm.). 



M Total mass of a vibrating diaphragm within its clamping circle 



(gm.). 



K = 



