KENNFLLY AND PIERCE. — TELEPHONE RECEIVERS. 



11' 



contains the frequency in cycles per second. The second column 

 gives the corresponding angular velocity in radians per second. The 

 third column gives R' the resistance free, at each frequency, as meas- 

 ured on the Rayleigh bridge; while the fourth column gives R the 

 corresponding resistance obtained with the diaphragm damped. The 



TABLE I. 



Mechanical Constants of Receivers. 



fifth column, headed "motional," gives R' — R; or the difference be- 

 tween the free and damped resistances with a proper sign for the 

 difference. The three remaining columns contain the corresponding 

 reactances, as obtained by multiplying the inductances observed on 

 the Rayleigh bridge by the angular velocity co in each case. The final 

 column, marked "motional," gives the excess of free reactance over 

 damped reactance, with proper sign. 



Tables III to VI contain data similar to those in Table II, but with 

 different applied voltages or dift'erent receivers. 



An examination of these tables shows that there are two independent 

 phenomena of interest; namely, 



First, the effect of the frequency on the resistance, reactance and 

 inductance of the receiver when damped ; and 



