40 KENNELLY AXD KUROKAWA. 



List of Symbols employed. 



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



a = a\ -i-ja-' Linear hyperbolic angle of an electric or acoustic conductor 

 hyps A ^ /hyps ^- 



km. / \ cm. 



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



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



7 = L41 Ratio of specific heats of air or other gas (constant pressure 



to constant volume) (numeric). 



A Apparent damping constant of a telephone receiver (hj'ps/ 



second) . 



6p, dA Position angles at point P and at sending end A, of electric or 



acoustic conductor (hyps Z ). 



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

 at sending end A, and at recei\-ing end B (rms. volts Z ). 



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



F Vibromotive force on a diaphragm; also at am' surface across 



which viV) ration 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). 



fijfo Lower and upper quadrautal frequencies of telephone receiver 



(cycles/sec), 

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



g Linear leakjince of electric conductor (mlios, km.). 



g Coefficient of Unear resiUence loss of acoustic conductor (mech. 



absohms cm.). 

 e = di + jdi 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^TT 



^ = IL Compression, or ratio of rms. diminution in volume to quiescent 



Po volume (nmneric). 



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



La 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.). 



^I Total mass of a vibrating diaphragm within its clamping circle 



(gm.). 



