162 ELECTRICAL PROPERTIES OF SILK. 
weight of the stocking that supported them, and 
this in a direction parallel to its surface. When 
one of the stockings was turned inside out, and put 
within the other, it required twenty ounces to se- 
parate them; though at that time ten ounces were 
sufficient when applied externally. Getting the 
black stockings new died, and the white ones 
washed, and whitened in the fumes of sulphur, and 
then putting them one within the other, with the 
rough sides together, it required three pounds 
three ounces to separate them. With stockings of 
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 was 
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 silk 
which had been left in the inside of the stockings, 
was found to be very unfavourable to these experi- 
ments. 
Mr Symmer also observed, that pieces of white 
and black silk, when highly electrified, not only 
cohered with each other, but would also adhere to 
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 to 
