[ 458 1 
If the tobacco-pipe, inflead of clay, is filled as 
above, with an electric fubflance, as wax, pow- 
dered glafs, or with any non-eledtric fubflance, in- 
ferior to metals as a condudlor, it will be burfl in 
pieces with nearly the fame quantity of the eledhic 
fluid. 
As the above experiments fucceeded better when 
the flone or clay were previoufly dipped in water than 
before, I was induced to try water only. 
Experiment IV. 
Having made a hole, without any cracks on the 
fide, through the bottom of the phial, a , fig. 4. 
which may eafily be done if the phial is conical at 
the bottom, as in the figure, by holding the phial 
inverted in one hand, and with the other finking a 
pointed fleel wire againfl the apex of the cone. 
Through this hole I palled a wire, b , and filled 
the bottom, c, with melted fealing wax, leaving the 
other end of the wire out, at d ; when the wax was 
cold, the phial was about 1 filled with water, and 
flopped with a cork, through which a wire, e> was 
pafied downwards, till the points of the two wires 
were diflant from each other about _V of .an inch, 
as near as my eye could determine a wire from 
the eledlrometer was fixed to e, and another from 
the loop of the machine was fixed at d j by an ex- 
nlofion, at 20 of the eledlrometer, the phial burfl 
* I in 
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