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Scientific American, Vol. 44, No. 21 (1881) (1881)
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has been patented by Mr. Willis Knowlton, NOVEL OIL SEPARATOR, adjustably attached to a spring bar, which is pivoted to of New York city. Heretofore cocks have been applied to We give an engraving of a machine for separating oil one end of the truss spring by a pin passing through a slot waste… … into furnace, heated to a welding heat, then guish the flame. © 1881 SCIENTIFIC AMERICIAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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