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Scientific American, Vol. 28, No. 14 (1873) (1873)
leaf 7
ness. These are heatedin three blades, two of which are at right angles to the rod to produce five tuns of finished horseshoe nails per week. Of these very ingenious devices, we present herewith il- a Siemens furnace, which is provided with two openings, at and cut straight through the center of a… … © 1873 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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