[ 68o ] 
a fmall revolving glafs Globe can excite it to the 
Velocity of Lightning, and that with a Force fuf- 
ficient to kill Animals, how much greater Agita- 
tion may it probably be excited to, by the explofivc 
Force of an Earthquake ! 
The Explofion of a Cannon in St. James's 
\ 'Park is obferved to elcCtrify the Glafs of the Win- 
dows of the Treafitry. And what makes it ftill 
more probable, is, the Analogy that there is be- 
tween them in other refpeCts. For, as the electri- 
cal Flafh rufhes, with the Velocity of Lightning, 
along the mod folid Bodies, as Iron, <&c. and as I 
have feen it run only on the irregular Gilding of 
Leather; fo fuch folid Bodies are obferved to be the 
Conductors of aereal Lightning, which rends Oaks 
in Pieces, and has been known to run along and 
melt an iron Bell- Wire on two Sides of a Room, 
<&c. And accordingly it was obferved, in the great 
Earthquake in 'Jamaica , that the mod tremendous 
Roaring was in the rocky Mountains. And in the 
late Earthquake of March 8. in London , the loudeft 
Explofions were thought to be heard near fuch large 
Stone Buildings as Churches, with lofty Steeples and 
Spires. 
I, who lay in Duke^s- Court, near St. Martini 
Church, and was awake all the Time of the Earth- 
quake, plainly heard a loud Explofion up in the Air, 
like that of a fmall Cannon : Which made me con- 
jecture, that the Noife was owing to the Rufhing 
off, and hidden Expanfion, of rhe eleCtrical Fluid, at 
the Top of St. Martini Spire ; where all the eleCtrical 
Effluvia, which afeended up along the larger Body 
ot the Tower, being by Attraction ftrongly con- 
denfed, and accelerated at the Point of the Weather- 
cock, 
