s of the failure of the Boydell system, with its cum- the steamer. The loads drawn by the two 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… … engine has ever satisfied the.demand for driving heavy trains speed varies from two anda half to six miles per hour for of wagons on common roads, until the advent of Mr. Thom. freight steamers, and tenmiles per hour if constructed special- around the iron tire. To this ingenious device is due the…
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