828 Mr. nairne’s Experiments to Jhew the 
EXPERIMENT IV. 
The apparatus remaining as in the laffc experiment, 
I only changed the ball of three tenths, and in its place 
fcrevved a wire about three inches and a half long, ter- 
minating in a point : on charging the artificial cloud, I 
could not now get the electric fire to ftrike the point, 
though the point was almoft in contadt with the ball c ; 
but when it was about half a tenth of an inch diftant 
from it, then the eledtric fire" ran in a very fmall ftream 
to the point; but beyond that diftance, though moved 
very gradually, it was only luminous, and continued fo at 
the point all the while it was gradually removing to the 
diftance of fix feet from the ball c, at the end of the arti- 
ficial cloud. 
EXPERIMENT V. 
The apparatus remaining as in the laft experiment, I 
changed the wire, and in its place fcrewed the ball of 
four inches diameter, ufed in the firft experiment, hav- 
ing now a fmall hole through it. I then put into this 
hole a wire, leaving the end, which terminated in a fine 
point, projecting out only one tenth of an inch beyond 
the furface of the ball, and diredtly pointing to the ball c : 
4 
on 
