162 ELECTRICAL PROPERTIES OF SILK. 



weight of the stocking that supported them, and 

 this in a direction parallel to its surface, Wher, 

 one of the stockings was turned inside out, and 

 Within the other, it required twenty ounces to se. 

 parate them ; though at that time ten ounces wen, 

 sufficient when applied externally. Getting th 

 black stockings new died, and the white one* 

 washed, and whitened in the fumes of sulphur, anc 

 then putting them one within the other, with the 

 rough sides together, it required three pounds 

 three ounces to separate them. With stockings 01 

 a more substantial make, the cohesion was still 

 greater. When the white stocking was put within 

 the black one, so that the outside of the white waa 

 contiguous to the inside of the black, they raised 

 nine pounds, wanting a few ounces ; and when the 

 two rough surfaces were contiguous, they raised 

 fifteen pounds one pennyweight and a half. Cut- 

 ting off the ends of the thread, and the tufts of sillq 

 which had been left in the inside of the stockings^] 

 was found to be very unfavourable to these experi-J 

 ments. 



Mr Symmer also observed, that pieces of white 

 and black silk, when highly electrified, not 

 cohered with each other, but would also adhere 

 bodies with broad and even polished surfaces*, 

 though these bodies were not electrified. This he 

 discovered accidentally ; having, without design, 

 thrown a stocking out of his hand, which stuck tq, 



