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Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. (1899)

Boyd, James Penny, 1836-1910 · Philadelphia, Pa., A. J. Holman & Co · leaf 54

An illustration from Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .., 1899, leaf 54
are also various automatic devices for thus regulat-ing the proximity of the carbons and maintaining the evenness of the glow.The power of an arc light is measured by candles. An ordinary arc light/undertwo amperes of current gives a light equal to twenty-five candles, while underfifty amperes of… … ELECTRIC ARC LIGHT. 44 TRIUMPHS AND WONDERS OF THE XIX1 CENTURY lamps for ordinary street purposes. No light surpasses the arc light inbrilliancy, excepting the magnesium light. There are few cities in thiscountry and Europe that do not employ the arc lamp as a means of street,station, and…

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