the oblong case cinstead of being united to a handle, is united to a base, board, or frame of any kind, by which it may be atlixed tothe wall in any convenient position.
the casebeing of hard rubber, is its own insulator.
eis the shaft to which the glass plate f is attached, and n the crank by which it is turned.
gare the pads in contact with the glass plate, for producing frictional electricity, and lL the forks or points for collecting,andj the ball for retaining, the electricity.
a wire, bextends to the burner A, its point B terminating at or near where the gas is to be lighted; and opposite to the point B there is another point, B', so that the spark that is t0 light the gas shall, in passing from point to point, pass ⁇ through the jet of gas, and thus insure its ignition.
a sparkmay be conducted to a second burner by a wire., b', so that two burners may belighted when theballj was deally charged with sufficient electricity to light two burners of itself.
