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American Labor and Machinery and Foreign Labor, &C - p66
doi:10.1038/scientificamerican11161850-66a
The Voltaic Battery—Precipitation of Metals - p67
doi:10.1038/scientificamerican11161850-67
New Jersey Elections and Railroad Monopoly - p67
doi:10.1038/scientificamerican11161850-67a
Booth's Patent for the Reduction of Gold - p67
doi:10.1038/scientificamerican11161850-67b
Improved Mode of Fastening Scythes in the Snaths - p68
doi:10.1038/scientificamerican11161850-68b
Telegraph Patents—Morse's, Bain's, and House's Claims - p70
doi:10.1038/scientificamerican11161850-70
The Iron Trade of England before the Discovery of Coal - p70
doi:10.1038/scientificamerican11161850-70a
