MORSE AND SHUDDEMAGEN. — AN ALUMINIUM ANODE. 



377 



forming voltage through the range of voltages indicated. The dotted 

 curve is a portion of the capacity curve of Figure 2. 



Capacities at various voltages below forming voltage have been meas- 

 ured by other investigators. Corbino and Maresca (17) give several 

 tables of data on the point, but all of their results are in contradiction 

 to the ones we have obtained. They find that in every case capacity 



.06 



o 



CO 



O 



<* 

 Q- 



o 



.03 



1.0 



1.6 



TIME • SECONDS 



Figure 6. 



Charging time curves. A, for very fully formed plate. B, ordinary curve 

 for average plate. AB, intermediate condition. Insulation time, 0.002 sec- 

 onds. Full discharge. 



Curve A^ Formed at 340 volts. Measured at 130 volts. 

 A 2 . " 340 " " 68 " 



B. " 340 " " 130 " 



AB. it 340 'A ii 130 ". 



at voltages below forming voltage is lower than at forming voltage it- 

 self. Figure 4 expresses the average of a great many observations, and 

 further confirmation of the correctness of these results will be found in 

 Figures 11 and 12, which give data on apparent capacity below forming 

 voltage after the cell has been left on open circuit for varying lengths 

 of time. The matter is a complex one, and can only be considered as a 

 whole after the other factors involved have been taken up individually. 

 Reference to Figure 1 7 shows that the capacity is not under all circum- 



