Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 511
Annunciator. 488 EXPERIMENTAL SCIENCE. are wound in the same direction, or in such a way thatwhen the two portions, A B, are placed end to end, one coilwould be simply a continuation of the other. The innerends of the coils are connected together, while their outerends are of sufficient length to… … Hand Power Dynamo. cast iron grooved longitudinally and across the ends, andwound with No. 18 cotton or silk covered copper wire. Itis, in fact, a very short and wide bar electro-magnet, havingenlarged and elongated ends of the form of a segment of aC3dinder. In diameter the armature is only a very…
Physics · Lantern projection · Electric apparatus and appliances
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