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Scientific American, Vol. 29, No. 15 (1873) (1873)

leaf 13

An illustration from Scientific American, Vol. 29, No. 15 (1873), 1873, leaf 13 — andrel, tube welding, H. K. Flagler. ‘ Screw blanks, machine for threading, E. Croft... $15 On an application for Design (7 years)... 142,672 142,712 142,578 Wrecking apparatus, McGroder & Tiedemann. Mechanical movement, W. Oliver.............. sie Separator, grain, J. W.… … © 1873 SCIENTIFIC AMERICAN, INC

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