814 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



VIII. Having obtained the slope term, the exponential was next ob- 

 tained by assuming the upper end point of one of the experimental 



TABLE V. 



Steady Current-Voltage Characteristic of Specimen II. 



carves to satisfy equation (30). This gave the exponent — 165/w, and 

 by trial the same exponent was found to apply approximately to all of 

 the other curves. That is, all the equations of Table VIII. were ob- 



t2 1.4 



Figure 12. Capacity in microfarads of Specimen II. for different values of 

 applied e. m. f. 



tained by employing the slope at the origin of each of the experimental 

 curves, and in addition assuming the exponential equation to be correct 

 for one other point of one of the curves. All of the points of all the 

 curves were then found to be closely given by the equations so derived. 



