Advantage of elevated pointed Conductors* 831 
EXPERIMENT IX. 
I took a flick of common fealing-wax, and having 
fixed a fcrew to each end, I palled a flip of tin-foil the 
whole length of the iurface, and having made a repara- 
tion. of the foil of about one fiftieth of an inch, I fcrewed 
the pointed wire into one end, and the other end of the 
wax to the brafs rod, where the ball with the point pro- 
jecting from it was placed in the lafl experiment. I alfo 
removed the other Hand with the ball, to which the ar- 
tificial cloud likewife llruck in the fame experiment j 
the artificial cloud was then charged, and the Hand being 
placed in fuch a manner that the point was directly op- 
pofite to the fide of the artificial cloud; it was then re- 
moved till I found the diltance at which the light be- 
tween the reparation of the tin-foil no longer became 
vifible. This diflance of the point on the wax was above 
feven feet, how much farther it might have been lumi- 
nous I had no opportunity of trying, this diflance being 
the farthefl I could remove it in my room, and under 
the difadvantage of having the end of the artificial 
cloud within thirty-three inches of the edge of the wain— 
fcot. When a ball of three tenths of an inch was put in 
the place of the point, the light was vifible at the dis- 
tance; 
