Advantage of elevated pointed Conductors. 849 
EXPERIMENT XXIII. 
The tube which I before called the moveable artificial 
cloud in the former experiments, from its moving very 
eafily on its axis, was, by means of two fcrews now fixed, 
immoveable, with the ball at one of its ends above the 
ball c at the end of the artificial cloud, at the height of 
three inches; and underneath the ball, at the other end, 
was placed the ftand with the point, at the diftance alfo 
of three inches. The artificial cloud was then charged, 
and an eledtric fpark flruck from the ball c at the end 
of it to the ball of the now fixed cloud above it, and at the 
fame inftant ftruck from the ball at the other end to the 
point at three inches. 
EXPERIMENT XXIV. 
The tube ufed in the laft experiment (which I now 
again call the moveable artificial cloud from its being 
made again to move freely on its axis) was placed exactly 
in every refpedt as in the laft experiment; the only dif- 
ference was, that it could now move eafily on its axis, 
whereas in the laft experiment it was fixed immoveable 
at the diftances: on charging the artificial cloud, the 
moveable artificial cloud, inftead of receiving a fpark, 
Vol. LXVHI. 5 N and 
