836 Mr. nairne’s Experiments to Jhew the 
our artificial cloud ftrikes to a ball of four inches diame- 
ter, only at the diftance of fix inches and eight tenths, 
when the point is drawn out nine inches from the three 
inch and a half ball, placed oppofite to the fide of the 
artificial cloud; and that when the point projects only 
one inch, that then it ftrikes to the four inch ball at fix- 
teen inches and four tenths diftance. 
May one not from thefe two laft mentioned experi- 
ments conclude, that the more elevated our pointed con- 
ductors are, the greater is the chance of prefer ving our 
buildings from the effects of lightning ? 
For here our point being elevated or projecting nine 
inches out of the ball, reprefenting the higheft part of a 
building, was found continually depriving our artificial 
cloud of its electric fire to fuch a degree (though it was 
kept charging all the time) that it would not ftrike half 
the diftance that it did when the point was elevated only 
one inch. 
And from the ninth experiment we learn, that the 
conductor terminating in a point acts at a far greater 
diftance than one terminating with a ball, in carrying off 
the electric fire, or matter of lightning from our artifi- 
cial cloud. It mull be further remarked, that though 
the point was luminous fo far, yet there was no diftance 
whatever at which our artificial cloud would ftrike to it. 
From 
