There is, perhaps, no mechanical subject, in which improvement has advanced so rapidly, within the last ten years, as that of railroad passenger cards. Let any person contrast the awkward and uncouth cars of '35 with the superbly splendid long cars now running on several of the eastern roads.
Scientific American volume 1 number 1, archive.org/details/scientific

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There is a great deal of ingenuity displayed in the construction of the machine illustrated by the accompany engravings. It is designed for paging account books and operates in the most rapid, accurate and perfectly successful manner.
Scientific American Vol V No 22 (1861) archive.org/details/scientific

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