on Dr. ingenhousz’s Experiments. 1055 
with the negative fide of the bottle,- as in this cafe the 
charge pafles along the under furface of the card. If 
the card be placed vertically between two infulated 
wires, as in the univerfal difcharger, defcribed in Mr. 
cavallo’s Treatife on Electricity, the experiment may 
be made with great facility and certainty. The card 
may be fixed on a bit of fealing wax, or fet in a piece of 
wood, fawn to a proper depth with a fine tenon faw. 
