to6 Mr. henly’s Experiments and 
diverging in different directions quite round it. If it be 
difcharged by bringing a pointed wire near the wire, or 
the prime conductor, with which it is in contaCt, the noife 
it occafions much refembles the report of a fired cracker; 
and the uncoated glafs between the fpots of tin-foil is 
very brilliantly illuminated. If the bottle difcharges it- 
felf fpontaneoully, or be difcharged fuddenly, by making 
a regular communication by the rod between the two fur- 
faces of the glafs, the whole outfide furface feems to be 
illuminated. To produce thefe appearances the glafs 
muff be thoroughly dry. 
XXTEEIMENT. 
A fmooth piece of mahogany, two inches fquare and 
five inches long, was hollowed into an elliptic groove, 
about three-quarters of an inch deep, and painted with 
lamp-black and oil. Into this groove two wires, termi- 
nated by brafs balls each three-quarters of an inch in 
diameter, were introduced; the brafs balls being placed 
about one inch and an half from each other : between 
the brafs balls, at an equal diftance from each, was 
placed a ball of the pith of elder, half an inch in dia- 
meter, nicely turned in a lathe. The apparatus being 
thus adjufted, and the circuit compleated by a fhort chain, 
a bottle, containing forty fquare inches of coated furface, 
was 
