File:A practical description of Herron's patent trellis railway structure also, the patent wrought iron railway chairs, new and improved mode of joining the ends of railway bars, scarfing timbers, and (14779299723).jpg

Identifier: practicaldescrip00herr (find matches)
Title: A practical description of Herron's patent trellis railway structure ... 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 ... with a compendious account of the process of kyanizing, in use on the English railways, for preserving the timber from decay: and the recent discoveries of M. Boucherie by means of the pyrolignite of iron ..
Year: 1841 (1840s)
Authors: Herron, James
Subjects: Railroad tracks Wood
Publisher: Philadelphia, E. G. Dorsey, printer
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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The author of a discovery has always to contend with those whose interests it may affect, with the obstinate partisans ijealous and the envious. Tliese classes combined, form, we are obliged to confess, the greater part of the public. This compact mass of opponents,time alone can separate and destroy; but time is not enough, they must be attacked boldly, they must be attacked without ceasing; the means of actionmust be varied, imitating the chemist, who is taught by experience, that the entire dissolution of certain alloys, requires the successive employment ofseveral acids.—M. Arago. PHILADELPHIA: E. G. DORSEY, PRINTER, LIBRARY STREET.1841. ^■^ fir iW
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4 -V/) <lJi 4i h ^^-y^ PEELIMINARY OBSERVATIONS ON THE USUAL MODES OF CONSTRUCTION, ANDMOST CONSIDERABLE DEFECTS IN RAILWAYS. Railways, in connection with steam engine machinery, are vast mechanical enterprisesthat have, within a few years, been extensively applied to the purpose of effecting inlandtransportation with unprecedented rapidity, certainty, and great comparative economy. Therailway itself, however, is believed to be of considerable antiquity, although of a very rudeconstruction, being first used only for temporary purposes. Railways of a more permanentcharacter, it is certain, have been in use, in the mining districts of England, for at least twohundred years. On these, the heavy minerals were slowly transported, either by manuallabour, 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

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