PIERCE AND EVANS. — CAPACITY OF CARBORUNDUM. 



799 



current obtained with this specimen is not a linear function of the ap- 

 plied e. m. f. This might have been anticipated from the fact that the 

 leak current through the crystal which increases the charge current 



TABLE II. 

 Equations of Current as Function of n. 



and diminishes the discharge current is not a linear function of the 

 voltage. 



Charge and Discharge Currents are Linear Functions of n. — If, in- 

 stead of being plotted against voltage, the charge and discharge current- 

 readings be plotted against the number of charges and discharges per 

 second, the curves of Figures 5, 6, 7, and 8 are obtained. These curves 



