322 



Tables 395-396. 



TABLE 396. 

 THE TRIBO-ELECTRIO SERIES. 



In the following table it is so arranged that any material in the list becomes positively electrified when 

 rubbed by one lower in the list. The phenomenon depends upon surface conditions and circum- 

 stances may alter the relative positions in the list. 



Shaw, Pr. Roy. Soc. 94, p. 16, 1917; the original article shows the alterations in the series sequence 

 due to varied conditions. 



TABLE 39e< 

 AUXILIARY TABLE FOR COMPUTING WIRE RESISTANCES. 



