KENNELLY AND PIERCE. — TELEPHONE RECEIVERS. 



129 



(e. g. Figures 5 and 6). Always, however, at consonance of the im- 

 pressed e. ni. f. with the period of the diaphragm, the motional power 



TABLE VIII. 

 Values of Power. Bell Bipolar Rb at 0.3 Volt. 



has a large positive value, which is no doubt correlative with the large 

 amount of sound produced under this condition. With the receiver 



