MACHINISTS.
Illustrated Catalogue and Price List of all kinds of small Tools and
Materials sent free to any address. GOODNOW & WIGHTMAN, 23 Cornhill,
Boston, Mass.
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Scientific American, Volume XXIV., No. 12, March 18, 1871 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 151 / 194 题