Elementary lessons in electricity & magnetism (1895)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · New York and London, Macmillan and co. · leaf 61
he ground. The sparks from the machine may be made to kindlespirits of wine or ether, placed in a metallic spoon, con-nected by a wire, with the nearest metallic conductorthat runs into the ground. A gas jet may be lit bypassing a spark to the burner from the finger of theperson standing, as just… … Fig. 33. 54 ELECTRICITY AND MAGNETISM tart If the machine be in good working order, and capable ofgiving, say, sparks 4 inches long when the knuckle ispresented to the knob, it will be found that, on fasteninga fine pointed needle to the conductor, it discharges theelectricity so effectually at its…
Electricity
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