124 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



volt at its terminals. At this voltage, the product for this telephone 

 averages 6.21, and within the range of frequencies between 428 and 



TABLE VI. 



Resistance and Reactance of Experimental Bipolar Receiver Pro- 

 vided WITH Exploring Coils, With 1 Volt at Terminals. 



890 cycles per second, the product does not depart from the average 

 by more than 2%. There is no march of the product within this range. 



