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INTRODUCTION.

a wish to satisfy public curiosity, andrender the illustration of their propertiesclear and comprehensive.

Chapter IX.—Contains an outline of thecomparative performance of the differentavailable species of motive power in theconveyance of goods by Canals and Rail-roads. Tables have been given, explanatoryof the weight of goods which horses canconvey, at different rates of speed, uponCanals and upon Rail-roads; and, also,the weight which horses can convey onCanals , and which loco-motive enginescan drag upon Rail-roads. The perform-ance of the latter will, also, represent theeffect with any other species of mechanicalpower on Rail-Roads, the energy of whichcorresponds with that assigned to the loco-motive engines.