er circular piece of wood is fitted to the top of made galvanometer. removed, additional binding placed on the coil if found The instrument described herewith is intended to the chimney, as shown in Fig. 1. A detail plan and necessary, and again baked at low heat for two or three section of this… … GLASS CHIMNEY. coils, and the combined re- consists of four parts—the lamp, the screen, the lens sistance of the complete coil is about 1,000 ohms— and the coils and needles. 500 ohins each. For the lamp, a bicycle lamp leaves nothing to be For the needles with the desired, though a commor…
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