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Scientific American, Vol. 89, No. 8 (1903) (1903)

leaf 7

An illustration from Scientific American, Vol. 89, No. 8 (1903), 1903, leaf 7 — Scientific American AUGUST 22, 1903. Fig. 7.—Metal Tipping. Fig. 8.—Rybber Masticators, THE MAKING OF A LEAD PENCIL, © 1903 SCIENTIFIC AMERICAN, INC

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