846 Mr. nairne’s Experiments tojbew the 
cloud did not return to the point as it did before the 
chain was hung on, as in the laft experiment. 
OBSERVATION. 
* 
In the eighteenth experiment, where the moveable 
artificial cloud was intended to reprefent a cloud in its 
natural ftate receiving electric fire from a charged cloud, 
we find, that the point deprived it of its eleitric fire which 
it received from the charged one fo fail, that the artificial 
cloud could keep conftantly ftriking to the other end, 
without repelling it from it; but that in the nineteenth 
experiment, when the ball was under the end of the 
moveable artificial cloud in the place of the point; then, 
inftead of the artificial cloud continuing to ftrike to the 
other end without repelling that end, it now firft attracted 
and charged it with electricity, or the matter of lightning ; 
then immediately repelled it, and being attracted by the 
ball under the other end, it moved down with an ac- 
quired velocity, till it came within its ftriking diftance, 
difcharging then its electricity on the ball with a loud 
and ftrong fpark, and fo continued alternately receiving 
and difcharging its eiedtric fire -on the ball. It being firft 
at trailed, at which time it received an additional quan- 
tity of electricity, and then repelled till it had difcharged 
that 
