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Scientific American, Vol. 57, No. 22 (November 1887) (1887)

leaf 7

An illustration from Scientific American, Vol. 57, No. 22 (November 1887), 1887, leaf 7
loyed. Be- larged—an appearance due to irradiation. to be added being regulated by practice. Only earth Without doubt the most striking illustrations of sides ordinary milling cutters, parallel or tapered colors or oxides of iron would be used for light red to irradiation are to be found in… … reported for the last two years has lUFROVED CUTTER GRINDER.] useful. been but 45 and 37 respectively. © 1887 SCIENTIFIC AMERICAN, INC.

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