1 1 8 Mr. henly’s Experiments and 
difcoverable on their reparation: fo far is even this ma- 
chine from exhibiting perpetual electricity. Indeed, in 
this particular, it is far exceeded by Mr. grey’s apparatus 
of the cone of fulphur in the glafs, which, on being fe- 
parated, I have never perceived to fail of exhibiting 
iirong figns of electricity, in every hate of the weather. 
To this apparatus I have lately added the improvements 
of M. jlpinas, and find that they fully anfwer his report. 
THE following paper contains a fet of experiments 
which may perhaps lead to fome curious, ufeful, and im- 
portant truths in electricity. They are made with the 
moft fimple apparatus, and in the moil fimple manner; 
nothing more being requifite for this purpofe than a few 
fticks of fealing-wax (one of them being referved as a 
teft) to the ends of which the fubltances to be examined 
are to be fixed or tied as occafion may require, and Mr. 
canton’s electrometer, neatly made and properly infu- 
lated. With this fmall apparatus may almoft every ar- 
ticle that can be propofed be examined with the utmoft 
facility. The animal, the vegetable, the foflil kingdom, 
with all the works and combinations of art and manu- 
facture, may afford materials ; almoft any of which, by 
a flight friction againft woollen cloth or filk, will become 
c electrified 
