Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 394
andthe small disc on top maybe removed if desired.The electroscope may be charged by touching a charged body to the knob, or by connecting it to the knob by a conducting wire. But sometimes it is more convenient to use a j^^^oof-plane (Fig. 464) which is simply a small metal disc on an insulating… … Fio. 463.—Another form ofelectroscope. Fio. 464. — Aproof-plane. 384 ELECTRICITY AT REST leaves are seen to separate even though the rod be a foot ormore away. This experiment shows that the mere presence ofan electrified body is sufficient to produce electrification inneighbouring conductors. The…
Physics
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