An elementary course of natural and experimental philosophy .. (1856)
Tate, Thomas, 1807-1888 · Boston, Hickling, Swan and Brown · leaf 235
Fig. 34. 16. A FEW EASY EXPERIMENTS WITH THE ELECTRICALMACHINE.- Exp. 1. Work the machine; bring your knuckle near to the primeconductor; a vivid and instantaneous flash, accompanied with a snap- … Fig. 35. ELECTRICITY. 231 ping noise, passes between the conductor and your hand, which producesa slightly painful sensation : this is the electric spark. A spark will be communicated to any conductor. Hold a stick ofsealing wax, or any other non-conductor, to the prime conductor: nospark will be…
Physics
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