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Scientific American, Vol. 52, No. 26 (1885) (1885)
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rican Meter Co., of the cut. To the back of a gas meter is attached a cyl- reliable than those of the -Bunsen photometer. To this city, the instrument was found wonderfully exact. indrical case communicating with its interior, and con- carry its accuracy a degree farther, an alum or water The bar… … general way to richer gas, would explode at a given the second to poyrer gas. time. © 1885 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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