. Machinery and processes of the industrial arts, and apparatus of the exact sciences. Fig. 90. Fig. 91,. Wildes Magneto-electric Machine In the year 1857, Dr. Werner Siemens, of Berlin, whose name hasbeen already mentioned above, constructed a magneto-electrical machine, 430 PARIS UNIVERSAL EXPOSITION. in which an elongated cylindrical armature, wound with insulated wirein the direction of its length, was made to revolve between the poles ofa number of parallel steel horseshoe magnets. In the spring of 1866,Mr. W. Wilde, of Manchester, England, conceived the idea of turningthe currents develo
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. Fig. 90. Fig. 91,. Wildes Magneto-electric Machine In the year 1857, Dr. Werner Siemens, of Berlin, whose name hasbeen already mentioned above, constructed a magneto-electrical machine, 430 PARIS UNIVERSAL EXPOSITION. in which an elongated cylindrical armature, wound with insulated wirein the direction of its length, was made to revolve between the poles ofa number of parallel steel horseshoe magnets. In the spring of 1866,Mr. W. Wilde, of Manchester, England, conceived the idea of turningthe currents developed by one of the machines of Siemens upon theinsulated wire envelope of a larger electro-magnet; these currents being,of course, brought into a common direction by means of a anticipated an increase of magnetic energy, and the result justifiedhis anticipations. The electro-magnet became powerfully excited. Byrotating, next, the armature of the electro-magnet, he was able to exciteto a still higher degree a second and larger electro-magnet, and in likemanner a third, and so on in indefi
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