C 736 ] 
As foon as the Machine was in Motion, the elec- 
trified BellJ attracted the Clapper, which immedi- 
ately by the repulfive Blaft was blown off to the 
unexcited Bell. By the time the fecond Bell was 
ftruck, the former attraded again 5 and this Jingling 
of the two Bells continued not only during the 
Motion of the Machine, but feveral Seconds after 
it was flopped. This was occafioned by the fmall 
Volume of the Clapper being able to convey away 
only a fmall Quantity of the eledrical ^Ether at each 
Stroke 5 by which it was fome time before the 
C ^Equilibrium was reftored. 
58. To demonftrate likewife, that the reftoring 
this <iy£quilibrium is not imaginary, I fhall mention 
an Experiment of a Gentleman (Mr. Wilfon ) who 
has taken great Pains in thefe Inquiries. Take two 
Plates of any Metal, very clean and dry, whofe 
Surfaces are nearly equal \ hang one of them to any 
excited Non-eledric, and bring under it upon the 
other a whole Leaf of Silver. When, which you 
find upon Application, the lilver Leaf is attraded,, 
lower the bottom Plate 5 i,f it is too low, you will 
obferve the leaf Silver jump up and down 5 if too 
high, it will only be attraded in Part, and thereby 
diffipate the eledrical Power. But if you get it at 
the proper Diftance, which will, very eafily be found 
upon Trial, the Silver will be perfedly fufpended at 
right Angles with their Planes, like the Trapezium 
of the Geometers, and touch neither of the Plates j; 
it will be extended likewife to its utmoft Dimen- 
lions. You frequently obferve, both at the Top 
and Bottom of the Silver, the eledrical Fire. The 
fame Effed is produced, if you reverfc the Experi- 
memv 
