n, we have the condi Ladd, a London instrument maker, constructed a machine tions requisite for the construction of a magneto-electric on this principle, which received the first prize at the Paris engine. We know that the lines of force must be frequently exhibition of 1867. cut at right angles,… … Fig. 6.—IMPROVED FORM OF GRAMME'S MACHINE. Fig. 1.—CLARK'S MAGNETO-ELECTRIC MACHINE. that the current should always flow in one direction. It consisted of a ring of soft iron, surrounded by insulated So soon as the year following Faraday's discovery, Pixii, wire, and revolved between the poles of…
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