Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 248
and the nail, which form a sufficient contact, are cut offeven on the under side, and the nail is allowed to project abouthalf an inch on the upper side. Proceed in the same way withthe other coils. The brushes are two pieces of No. 16 copper CONSTRUCTION OF APPARATUS. 235 wire held by wooden… … This armature is then mounted under the magnet, as near toit as possible without touching, and connections made as indi-cated. This contrivance has all the essential parts of a dynamo ormotor. On sending through it sufficient current the wheel willrevolve, the motion being varied by varying the…
Physics
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