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Scientific American, Vol. 51, No. 7 (1884) (1884)

leaf 8

An illustration from Scientific American, Vol. 51, No. 7 (1884), 1884, leaf 8
sed in lengths mond and four-fifths steel. After separation the dust is used hole must be drilled, after which the disk is turned toatrue of 18 inches. Then these are cut automatically to the in that state for diamond saws only; but, for polishing, it is diameter. It is then forced into a recess of… … Separated, cleaned by acid, and blued. After the leaves have been cut, the pin- The spring is now attached toa brasscollet ions are hardened and tempered, polished in the center, and to a steel stud at the and finished ready for use. Seven barrels of flour a month are consumed in making outer…

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