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 197
een them through which the fibresuspension passes. The coil is completely enclosed from the atmos-phere, which assists in renderingthe instrument dead-beat in its action,i e., so that the magnetic system may come to rest almost instantlywithout first making a number of vibrations when the circuit… … Fig. 163 —Thomson Mirror-Reflecting Galvanometer with Lamp, Stand, Scale and Con-nections of Apparatus for Measuring the Insulation Resistance of an Electric Cable. with leveling screws, and can be rotated on its vertical axis. Thecurved controlling magnet, arranged on >the vertical tube, can…
Electricity · Magnetism
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