[ 78 ] 
Explofion : And therefore, to examine this Matter 
with the requifite Exadnefs, this Number of Explo- 
fions fhould be made. 
To execute this, the eledrifying Machine was 
placed up one Pair of Stairs in a Houfe upon the 
Weft Side of Shooters Hill ; and a Wire from the 
fhort iron Rod, with which the Gun-barrel was 
touched in making the Explofions was conducted 
upon dry Sticks as before into a Field near the feven 
Mile- Stone. The Length of this Wire, cxclulive of 
its Turnings round the Sticks, was a Mile, a Quar- 
ter and eight Poles, 01*6732 Feet. In great Part of 
this Space it was found very difficult to fupport the 
Wire, on account of our fcarcely being able to fix 
the Sticks in the ftrong Gravel there almoft with- 
out any Cover of Soil 5 nor could the Wire in fome 
Places be prevented from touching the Brambles 
and Bufhcs, nor in one Field the ripe Barley. 
Another Wire was like wife conduded upon 
Sticks from the coated Phial to the nine Mile-Stone. 
In this Space, the Soil being a ftrong Clay, the 
Wire was very well fecurcd, and in its whole 
Length did not touch the Bullies. The Length of 
this Wire was 386 8 Feet. As much as the Place, 
where the Obfervers, were ftation'd in a Corn-Field, 
was nearer the Machine than the feven Mile-Stone, 
fo much were the other Obfervers placed beyond 
the nine Mile-Stone, that their Diftance from each 
other might be two Miles. The forty Feet of Wire 
in thefe two Mcafures exceeding two Miles, was 
what connected the fhort iron Rod before-mention’d, 
and the coated Phial, with their refpedive conduct- 
ing Wires. 
The 
