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Scientific American, Vol. 56, No. 18 (1887) (1887)
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ans, to whom writing was a|it had become badly corroded, and many parts were in the project of inventing a machine that would take | very irksome employment. The two patents and the| broken. Mr. H. R. Cummings, of Worcester, gathered the place of pen and pencil for those who were blind or | present… … IMPROVED ORE. CRUSHER AND AMALGAMATOR,—[For description see page 276.) © 1887 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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