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Scientific American, Vol. 67, No. 9 (1892) (1892)
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osition of its upper surface changed. At a depth hardening the surface of the plate by the Harvey car- about 1 per cent. of about three inches from the surface the percentage Up to the present the experimenters have confined bonizing process. Now we have the full demonstra- of carbon has been… … © 1892 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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