OWNERS OF THE U S. PHOSPHOR-BRONZE PATENTS.
Sole Manufacturers of Phosphor-Bronze in the U. S.
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Magic Lantern Catalogue, 50 pp, and Lecture, 10cts.
Scientific American, Volume XLIII., No. 25, December 18, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 105 / 165 题