128 



PROCEEDINGS OF THE AMERICAN ACADEMY, 



It is not necessarily true that all of the motional power goes into 

 energy of motion. The term means merely the excess of input when 



TABLE VII. 



Showing Product of R and L for Bipolar Receiver Rb with 0.42 Volt 



AT Terminals. 



sounding over input when damped. As a matter of fact, the motional 

 power is negative at some frequencies, as is shown in some of the curves 



