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The roads and railroads, vehicles, and modes of travelling, of ancient and modern countries; with accounts of bridges, tunnels, and canals, in various parts of the world .. (1839)

London : J.W. Parker · leaf 315

An illustration from The roads and railroads, vehicles, and modes of travelling, of ancient and modern countries; with accounts of bridges, tunnels, and canals, in various parts of the world .., 1839, leaf 315
ey are set at right angles toeach other, so that the freak or dead points of the one maycorrespond with the strongest points of the other. Thereis. of course, a difference of half a stroke between the twoengines, to accommodate them to this arrangement; oneengine is always half a stroke later than…

Roads · Railroads · Bridges · Vehicles

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