Allen — The Electrical Resistance of Porcelain. 



295 



Table 2. 

 For sample D. 



In Fig. 3 are shown some of the leakage curves obtained for sample B, 

 and these are found to be approximately logarithmic. 

 . A direct voltage test was made on sample B, and the results obtained by 

 the galvanometer method are given in Table 3. 



Table 3. 

 For sample B. 



