C +5 2 I 
Figure i„ 
A. The cylindrical glafs of the machine, ufed 
inftead of a globe. 1 The cylindrical part of 
the glafs is fix inches in length, and fixteen in 
circumference. 
13. The wheel, at every turn of which the cylindri- 
cal glafs revolves four times. 
C. The conductor. 
D. The coated phial. 
E. A brafs wire loop, palling through the wood 
work to a tin plate, on which the coated phial 
Hands.. 
F. The pillar of the Electrometer made of wood, 
bored cylindrically about ^ of its length, and 
rendered eleCtrical, by being long baked in an 
oven, and then boiled in linieed oil, and again 
baked. At fir ft the pillar was made of brafs, 
which, though it ferved very well to determine 
the eleCtric ftroke for medical purpofes, yet 
was defective in many experiments, as the ta- 
ble thereby became a ready conductor. 
G. Brafs work, having its lower part inclofed within 
the bore of the pillar, 
H. A ferew, which paffes through the brafs work 
near the bottom, and fixes it in the pillar. 
I. A groove for the ferew H to move in, when the 
Electrometer is moved higher or lower, as the 
different heights of different condenfing phials 
may require. 
K„, A well polifhed bemifpherical piece of brafs, 
fixed to the conductor.. ‘ k ’ * - ’ . 
L. A 
