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Scientific American, Vol. 36, No. 23 (June 1877) (1877)
leaf 3
th two outside footways of 6 feet The weapon is constructed of gun metal, and thus is almost feet 4 inches in length, and thence by nine brick arches 43 8 inches in the clear, making the total width from out to out impervious to wet, another weakness to which the old style feet 6 inches span, from… … MTERI0R VIEW OF SOUTH STREET BRIDGE PHILADELPHIA PA © 1877 SCIENTIFIC AMERICAN, INC.Patents · Iron · Inches · Valve · Boiler · Feet · Scientific American · Water · Sulphuric acid · Sheet iron · American patent · Compressed air · Alternate board · American supplement · Horse power · Safety valves · Patent office
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