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Scientific American, Vol. 62, No. 8 (1890) (1890)

leaf 10

An illustration from Scientific American, Vol. 62, No. 8 (1890), 1890, leaf 10
the vapor passes, and is condensed into a fine being arranged in the same manner, when the key, K, dust. Gradually the cap becomes hot and melts the is depressed, it cuts out the bell, C, and forms a contact dust into liquid zinc, which runs into moulds and is with the point, d, thus sending a… … crystalline fracture. It does not rust easily and takes BATTERY AND MAGNETO CALLS FOR TELEPHONE LINES. a good polish. Owing to this polish, it is used for lightly upon the other. A notch is filed in the carbon In the right hand figure, the telephone, T, is con- making stage jewelry. Under the most…

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