[ 408 ] ' • 
being deprived of its electricity by the pin, See. in- 
flantly flies to that part of the glafs to which it is 
attracted the moft forcibly. 
EXPERIMENT III. 
I hung on my prime-conductor a fmall phial, 
two inches in diameter, coated three inches and a 
quarter from the bottom. From the coating of 
this phial, I fufpended two chains ; the firft, in 
contact with a heavy weight, placed upon a card, 
acrofs which, I had ruled lines, at equal diftances, 
tab. xiv. fig. i. the fecond chain formed a 
circuit, with leaden pipe, fmall brafs wire, fmall 
chain, See. of one hundred and twenty feet in 
length. From the ball of my difeharging rod, 
which refted on another weight (fee the figure), I 
alfo hung a chain, in contact with, and corn- 
pleating, the circuit of one hundred and twenty 
feet before-mentioned ; and obferved, that, if my 
bottle was charged quite full, the electricity 
would, in the difeharge, pafs through the long 
circuit , rather than over the furface of the card, 
when the weights were placed at nine fixteenths 
of an inch afunder: but, if I charged the bottle 
only about half-full, the electricity would, in the 
difeharge, pafs through the long circuit, rather 
than over the furface of the card, though the 
weights were placed at the diflance of only three 
fifteenths of an inch. — Query, Can there be a 
greater proof of the fmall refinance made b y metal 
to the pafling of the ele&ric matter, compared 
with card, wood, &c. and confequently of the uti- 
lity 
