er fitted with, a glass handle, and of a somewhatsmaller diameter than the disc, rests upon the latter. Ifnow the disc be briskly rubbed with wool, or better withcats fur, it becomes negatively electrified. Now plac-ing the cover on the disc, by influence a positive charge isproduced on its under… … Fig. 4. of the cover that becomes a free charge when this conduc-tor is lifted by the insulating handle. Now on approach-ing the cover to the knuckle or other conductor connectedto the ground, the positive charge attracts a correspondingquantity of negative electricity to the knuckle. When…
Electronics · Electricity
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