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Scientific American, Vol. 78, No. 15 (April 1898) (1898)

leaf 7

An illustration from Scientific American, Vol. 78, No. 15 (April 1898), 1898, leaf 7
d on the coil if found the chimney, as shown in Fig. 1. A detail plan and The instrument described herewith is intended to necessary, and again baked at low heat for two or three section of this piece is shown by Fig. 3. It is bored out obviate almost entirely the necessity for skilled man- hours.… … GLASS CHIHNET. consists of four parts—the coils, and the combined re- fig. 1,-SENSITIVE "HOHE-KADE" GALTANOHETEB lamp, the screen, the lens sistance of the complete coil is about 1,000 ohms— and the coils and needles. 500 ohms each. For the lamp, a bicycle lamp leaves nothing to be For the needles…

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