[ 8t ] 
general hollow, and feemed to be nothing but 
fcoria. The drawing is a reprefentation of dis- 
charging the battery through the wire. I have made 
a piece of the fame wire, of 3 feet 1 1 inches long, 
red hot, from end to end, fo that it feparated into 
feveral pieces. After this, I took a piece of the fine 
iron wire beforementioned, of fix inches in length, 
and, to the end of it, connected a piece of iron 
wire _L-th of an inch in diameter, and 48 feet long. 
Then, on difeharging the battery, the eleCtrical fire 
from the infide palled immediately along the dif- 
eharging rod to the fine wire, and afterwards had 
48 feet to pafs, to get to the outfide coating of the 
’battery : I then laid another piece, fo that the elec- 
rical fire palled 48 feet, from the infide of the bat- 
tery, before it came to the fmall wire; and again ano- 
other, fo that the electrical fire palled from the in- 
fide of the battery 24 feet, before it came to the fine 
wire, and had 24 feet afterwards to pafs, before 
it could get to the outfide coating of the battery ; 
in each cafe, the 6 inches of the fmall wire was 
melted into red hot balls ; and I could not perceive, 
that there was the leaft difference, in the melting 
of the wire, on its being placed in different parts 
of the circuit. Next, I connected to a piece of 
the fame fine iron wire, of 6 inches in length, a 
piece of the iron wire ^L-th of an inch in diame- 
ter, and in one continued piece of 274 feet in 
length. In this arrangement, when the battery 
was difeharged, the electrical fire paffed imme- 
diately from the difeharging rod to the fine wire, 
and had 274 feet to pafs afterwards, to get to the 
outfide coating; then the fine wire was laid next 
the outfide coating of the battery, fo that the 
Vol.LXIV. M electrical 
