Baille, Jean Baptiste Alexandre, b. 1841, Armstrong, John W., ed · New York, Scribner, Armstrong, and co. · leaf 106
he monitor is enclosedin a fixed box, and con-sists of a compass, the ver-tical needle of which is movable between two bells. The machine, in fact,forms a sort of receiver. Beneath it is a manipula-tor formed as usual with a grooved wheel, worked bya handle, and used to break and close the… … ),louitor. 86 WONDERS OF ELECTRICITY. mediately to the nearest monitor. Here lie opensthe box and gently turns the handle completelyround. In our illustration, the wheel displays fivesinuosities, and consequently the machine indicatesa distance of about twelve and a half miles from thedepot…
Electricity
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