SHUDDEMAGEN. 



RESIDUAL CHARGES IN DIELECTRICS. 



507 



TABLE XLII. (Figure 8.) 

 "Pah. B " vs. Arc. 



These condensers, " Par. C " and " Par. Ci," are the ones which were 

 made with paraffined paper soaked in wax only moderately warm, so 

 that the air bubbles of the paper were not expelled. They show enor- 

 mous residual capacity ; in fact, to get the throws for " Par. C " four 

 residual charges had to be read by the galvanometer, besides the first 

 throw directly after neutralization of the charges of the air condenser 

 and the test condenser. 



The bracketed values in the last set of observations were obtained by 

 reversing the terminals of the " Par. B " condenser. After these two 

 readings the terminals were changed back again. The bracketed fig- 

 ures, when compared with those immediately preceding and following, 

 show a curious " set " in the polarization. This point deserves further 

 study, and it is hoped that it may sometime be taken up at length. 



