Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 95
sbetween two rubbers, ordinary mechanical friction com-ing here into play, and producing on the spot the heatdue to such friction. Besides this, however, the electricalattraction between the rubber and the glass has to beovercome, and it is the particular portion of»the force ex-pended in… … friction occurs, the former may be developed at anydistance from its origin. On the table before me lies a coil of wire, over-spun with cotton, as it has come to us from the manufac-turer. The two ends of the coil (a, b, fig. 24) are nowunconnected. I lift one side of the coil, and in doing…
Heat
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