Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 196
r = .372 from Prob.69, tan d = 1.1918. 189. ThomsonGalvanometer.— In this type of instrument, Figs. 161 and162, great sensibility has been attained bybringing thecoil as closeto the needleas possible)and windingit with manyturns of veryfine wire.On the back Fig. 162.—Details of the Coil. of a small… … Mirror-Reflecting Fig. 161.—Thomson Mirror-Reflecting Galvanometer(single coil).
Electricity · Magnetism
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