C 19 1 1 
ing, they made a crackling noife, and 
that in the dark he could perceive them 
emit fparks of fire. 
This phenomenon, which he attributed 
to electricity, induced him to undertake a 
feries of experiments, which led him to 
the difcovery of two lingular faCts, viz. 
1 ft, That the eleCtrical appearances took 
place only, when he made ufe of black 
and white coloured ftockings. 
2d, That ftockings electrified in this 
way, refill: the application of a force to 
difunite them. 
The author made fome experiments 
for the purpofe of calculating the power 
of the eleCtrical cohefion, and he foon 
found thefe ftockings capable of railing 
near twenty times their own weight. 
But on repeating thefe experiments in a 
favourable feafon, and with ftockings 
which were perfectly new, and the black 
dipped afrefh, and the white newly 
cleaned 
