. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. vff j Fig. 04. Rail Pboposed by 0. Cham if,, 1874. From i drawing in iIn- I" S. [National Museum. ) English engineers had, in the mean time, given considerable attention to the jQ_ rail (or ;'box rail," as it is sometimes called) both in England and in Canada. Imported XI rails were laid as early as September, 1835, on the Wilmington and Susquehanna .Railroad. In 1845 a modification of the XI rail was laid on the Drogheda Railway
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. vff j Fig. 04. Rail Pboposed by 0. Cham if,, 1874. From i drawing in iIn- I" S. [National Museum. ) English engineers had, in the mean time, given considerable attention to the jQ_ rail (or ;'box rail," as it is sometimes called) both in England and in Canada. Imported XI rails were laid as early as September, 1835, on the Wilmington and Susquehanna .Railroad. In 1845 a modification of the XI rail was laid on the Drogheda Railway in Ireland—the rail being compressed inwardly at the bottom until the inside comers were made to touch. In America a small quantity of a similar rail was manufac- tured at the Mount Savage rolling mill, called "hollovv ; This was done by heating the rail after it had been rolled to size and passing- it through a set of rods designed for the purpose.* A cross-section of this form of rail in use on the Great Western Rail- way of England is shown in Fig. 65, while in Fig. 60 a cross-section. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Board of Regents; United States National Museum. Report of the U. S. National Museum; Smithsonian Institution. Report of the Secretary. Washington : Smithsonian Institution
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
