o sizes now made contributes to the great success of the wheel as a whole. brous self-carrying tramway, or the Bray engine with its pro- are from twelve to. twenty tuns, up inclines of one in twelve, Holes are made in the inner iron rim of the wheel to admit jecting and receding claws operating… … THOMSON'S PATENT ROAD STEAMER. creep round the wheel, so that in going a mile with a heavy engine has ever satisfied the.demand for driving heavy trains speed varies from two and a half to six miles per hour for freight steamers, and tenmiles per hour if constructed special- load in tow, the rubber…
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