[ 59 ] 
be felt from the Obferver dipping his Hand in Wa- 
ter only, unlefs that Water was fo difpofed as to 
become Part of the Circuit; and this Experiment 
was made, left the contrary might be furmifed. 
The Obfervers upon the Weftminfter Shore not 
feeling the ele&rical Commotion equally ftrong 
with thofe of Surry , was judged to proceed from 
other Caufes belides that of Diftance. For it muft 
be conlidcr’d, that the conducing Wire was almoft: 
throughout its whole Length laid upon Portland 
Stone handing in Water. This Stone, being in a 
great Degree non-ele&ric, is ofitfelf a Conductor of 
Electricity : And this Stone (landing in Water, no 
more of the Electricity was tranfmitted to the Ob- 
fervers on the Weftminfter Shore than that Propor- 
tion, wherein Iron is more non-electric, and, con- 
fequently, a better Conductor of Electricity than 
Stone. This was made more manifeft, from obferv- 
ing that whether the conducting Wire upon the 
Bridge was broke or no, and, confequently, whe- 
ther the Obfervers upon the Weftminfter Shore felt 
the electrical Commotion or no, not only the Ob- 
fervers upon the Surry Shore, who with their Wire 
form’d Part of the Line, felt the Shock in their 
Arms; but thofe Perfons who only ftood upon the 
Stone Steps there, and touched the Wire with their 
Fingers, felt the electrical Commotion in the Arnt 
of that Hand which touched the Wire, and down 
their Legs. From whence, and from the Perfon before 
fpoken of feeling the electrical Commotion (land- 
ing upon the wet Stone Steps of the Weftminfler Shore, 
tho' not forming Part of the Line, but only touching 
the Wire with his Fingers, it was concluded, that, 
beftdes the large Circuit before fpoken of, there were 
H 2 formed 
