combs, and that the sectors on the one disk act long, and have a mean width of 1°65 inches, thus hav- as inductors and as carriers respectively to those on such, which can be made without much outlay, with ing an area of 31°35 square inches. There is thus on simple, easily attainable materials, and… … be constructed. Although the great machine which we illustrate in this notice was working in a workshop in which there inches, or a thousand square inches on the two disks investments may be considered permanent, as the was a steam engine and boiler at work, and conse- together. needle and wire can…
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