Abstract
IV.
IT will only be necessary to describe generally the construction of the Syphon or Recording Galvanometer. It consists essentially of two parts; first, that portion of the machine which, being influenced by the received current, oscillates or moves, thus becoming the motor or mechanical power; and, second, the arrangement for permanently recording or registering this motion. The motor or mechanical power is obtained by the employment of a very light suspended coil consisting of a small number of turns of fine insulated wire, placed in a very powerful magnetic field produced by permanent magnets or electro-magnets; these act with great exciting force upon the suspended insulated wire coil, causing it to deflect or vibrate when the current passes through it.
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The Progress of the Telegraph * . Nature 11, 510–512 (1875). https://doi.org/10.1038/011510a0
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DOI: https://doi.org/10.1038/011510a0