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Johnson's Adjustable Hanger for Shafting - p52
doi:10.1038/scientificamerican10231858-52e
Glass Grinding and Polishing—Another Triumph of American Inventors - p53
doi:10.1038/scientificamerican10231858-53a
The American Institute and its Exhibitors - p53
doi:10.1038/scientificamerican10231858-53e
The Atlantic Cable and Telegraph Conductors - p54
doi:10.1038/scientificamerican10231858-54
