A Practical Description of Herron's Patent Trellis Railway Structure: Embracing the Most Approved Modifications; Also, the Patent Wrought Iron Railway ... Bars, Scarfing Timbers, and Improved Fasten - Softcover

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Excerpt from A Practical Description of Herron's Patent Trellis Railway Structure: Embracing the Most Approved Modifications; Also, the Patent Wrought Iron Railway Chairs, New and Improved Mode of Joining the Ends of Railway Bars, Scarfing Timbers, and Improved Fastenings: Illustrated by Four Large Plates of Working Plans, Accomplished

Runways, in connection with steam engine machinery, are vast mechanical enterprises that have, within a few years, been extensively applied to the purpose of effecting inland transportation with unprecedented rapidity, certainty, and great comparative economy. The railway itself, however, is believed to be of considerable antiquity, although of a very rude construction, being first used only for temporary purposes. Railways of a more permanent character, it is certain, have been in use, in the mining districts of England, for at least two hundred years. On these, the heavy minerals were slowly transported, either by manual labour, horse-power, or by gravity; and, in some few cases, slow-motioned locomotive steam engines were in use for several years anterior to their application to commercial transportation. It was the favourable results obtained with these engines on the mineral railways, together with the establishment of the very important facts, that the resistance from friction did not increase with an increase of velocity, and that the adhesion of the engine wheels on the cast iron rails, then alone in use, was adequate to the traction, that first led to their projection and successful application in the rapid transportation of persons and property.

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