[ 7*6 ] 
Shoulder, Elbow, and Wrift$ and both my Legs, 
at the Knees, and behind near the Ankles. So that, 
to try the Effe&s of this Experiment, you muft be 
careful of not ele&rifying the Phials too much. If 
a dozen or more of thefe Phials, or one very large 
Bottle, were cover’d over with thin Lead in the 
above manner, and ftrongly eleftrified, and this 
Ele&ricity were difcharged by a Man at oitce in the 
manner here mention’d, I fhould dread the Confe- 
quences. J 
30. We muft obferve, that this Shock is not felt, 
unlefs the Wire, coming from the Bottoms of the 
Bottles, is touched 5 and then not, if the Shoes are 
dry, and of confequence originally-ele&ric. In this 
Experiment we fee the Effects of the Increafe of the 
Points of Contact 5 and it feems the more furprifing 
to thofe who ate not acquainted with the Caufe, 
when the Wire is concealed under a Floor-cloth, 
that the moving of their Feet only one Inch, fhould 
occafion them, all other Circumftances apparently 
the fame, to feel a violent Shock, or none at all. 
A thick Carpet, inftead of a Floor-cloth, is liable to 
prevent the Succefs of this Experiment, for the fame 
Reafon as dry Shoes. This Experiment may aptly 
enough be called, thefpringing an electrical Mine. 
31. If, in the former Experiment, the lower fmall 
Wire is faften’d to an iron Rod 5 and if, when the 
Phials are ever fo ftrongly excited, that Rod is held 
in the Hand of a Man {landing upon the Floor, and 
with it he touches the Gun barrel, he perceives no 
Shock, for Reafons prefently to be afligned. But 
if he takes this iron Rod in one Hand, and touches 
the Gun-barrel with the other, he then is violently 
2 ftruck. 
