Elementary lessons in electricity & magnetism (1895)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · New York and London, Macmillan and co. · leaf 27
arge ones. 18. The Torsion Balance. — Although more properlyan Electrometer than a mere Electroscope, it will bemost convenient to describe here the instrument knownas the Torsion Balance (Fig. 15). This instrument, oncefamous, but now quite obsolete, served to measure theforce of the repulsion… … Fig. 14. 20 ELECTRICITY AND MAGNETISM part i or lever of shellac suspended within a cylindrical glasscase by means of a fine silver wire. At one end thislever is furnished with a gilt pith-ball n. The upperend of the silver wire is fastened to a brass top, upon which a circle, dividedinto degrees,…
Electricity
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