[ lo + T 
patting off by that Crack. The cledrical Explofion 
from two or three of thefe GJafles is not double or 
treble to that from one of them s but the Explofion 
from three is much louder than that from two, that 
from two much louder than that from one. 
§ XI. The Experiment juft mentioned induced 
me to imagine, that the Explofion from thefe Phials 
was owing to the great Quantity of non-elcdric 
Matter contained in them : And whilft I was con- 
iidering of fome certain Method of alluring myfelf 
whether the Fad were fo. Dr. Bevis informed me, 
that he had found the eledrical Explofion to be as 
great, as when he had accumulated the Eledricity 
in a half Pint Phial of Water, by the following 
Method. He covered a thin Plate of Glafs, of about 
a Foot lquare on both Sides, with Leaf-Silver ; this 
he made to adhere to the Glafs with very thin Paftc. 
A Margin of an Inch was left on both Sides ; other- 
wife, upon eledrifying this Plate, the Eledricity 
would be prevented from being accumulated upon 
one of its Surfaces, by being propagated from the 
Silver on one Side to that of the other. When the 
glafs Plate was thus prepar’d, if it was placed upon 
a Table in fuch a Manner, that, when fully elec- 
trifed by a Wire or fuch-like from the prime Con- 
dudor, a Perlon touched the under Surface with a 
Finger of one of his Hands, and brought one of the 
Fingers of his other near the upper Surface thereof, 
or near the prime Condudor, he was (hocked in 
both his Arms and acrofs his Bread. The fame Effed 
happen’d, if, when this Plate was eledrified in the 
before-mention’d Manner, a Perfon holding it in his 
Hand by the Margin, and without touching the Sil- 
ver, 
