606 MORSE \NB SAEGENT. — RESISTANCE OF LEAD ACCUMULATOR. 



was to be expected that the resistance would decrease very rapidly 

 after passing through a maximum near the end of complete discharge 

 of the cell, and that the e. m. I would also reverse rapidly and soon 

 attain nearly its maximum with sign opposite the normal direction in 

 the cell. Table VI. and Figure 7 show how well this is realized : 

 The data of the above table is plotted in the curves of Figure 7, and 



20 



VO 



60 80 



TIME-MINUTES 



WO 



120 



liO] 



Figure 9. Resistance of Plante plate cell at various discharge rates. 



they indicate qualitatively but clearly the course of the changes in the 

 cell. It should be mentioned that the sharp point at the maximum 

 of resistance (about .20 ohm) is only a rough approximation, as it was 

 quite impossible to follow the change in this portion of the curve 

 rapidly enough to insure accuracy. It is, however, quite certain that 

 the point given is lower than the true maximum value. 



Pasted Plates. 



11. New pasted plates were thoroughly charged and put through 

 several cycles until their capacity was approximately constant. They 

 were then set up in a cell with separation of the plates as nearly as 

 possible that of the Plantd cells. The curves given in Figure 8 show 

 the course of the resistance during discharge at 2 amperes at various 



