Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 496
wire nails, c, arranged atequidistant points. The copper winding of the ring is spacedoff into as many sections as there are nails in the circularrow, and at the end of each section the insulation of thecopper wire is removed a short distance, and a wire, ?, isattached by soldering. These attached… … Details of Armature. on opposite sides of the commutator nails, as shown in Figs. 457 and 458.This dynamo has all of theessential features of the regularmachine—the field magnet, theiron armature core, the conductorwound upon the core, the com-mutator cylinder formed of thewire nails, and the…
Physics · Lantern projection · Electric apparatus and appliances
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-318-34.webp)
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-438-173.webp)