The outlines of physics: an elementary text-book (1897)
Nichols, E. L. (Edward Leamington), 1854-1937 · New York, The Macmillan Company; London, Macmillan & Co., Ltd. · leaf 268
shown in Fig. 213. I ^—^ /This is suspended by means of two par- j.^^ 213.^^^allel fibers of unspun silk attached to aplatinum wire which passes through the center of theneedle. To the other end of this wire, which extendsbelow the needle, is attached a tiny vane of platinum.(See Fig. 214.) The… … Fig. 216, Fig. 21a. from one another, and are mounted upon glass posts whichserve as insulators. A glass jar below has an outer coatingof foil like a Leyden jar. Within, it is partly filled with 254 THE OUTLINES OF PHYSICS strong sulphuric acid. This is placed at such a heightthat the vane v…
Physics
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