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    Features

    Combined Hand and Foot Circular Sawing Machine

    Spool Blank Roughing Machine

    How Axes are Made

    The Car Shops of West Albany

    The Advantages of Scientific Education

    Detection of Impurities in Milk

    Handles for Barrels and Boxes

    American Horses

    Giffard's Universal Piston

    Bed Bottom

    Miscellaneous Items - September 7, 1872

    Fancy Weaving Loom

    Griswold's Dental Plugging Instrument

    Iridescent Engravings

    Science and Theology

    Progress of the New Docks in this City—Artificial Stone Blocks Weighing Seventy-Nine Tuns

    Progress of American Industry—Inauguration of Five Grand Industrial Expositions

    Manufacture of Vinegar

    The Lake Superior Copper Regions

    Scientific and Practical Information - September 7, 1872

    Remarkable Thunderstorms

    Letter from Professor R. H. Thurston - September 7, 1872

    Recent American and Foreign Patents - September 7, 1872

    Practical Hints to Inventors - September 7, 1872

    Foreign Patents—A Hint to Patentees

    New Patent Law in Canada - September 7, 1872

    Departments

    • From the Editor

      Answers to Correspondents - September 7, 1872

    • Letters

      Correspondence - September 7, 1872

    • Recommended

      New Books and Publications - September 7, 1872

    • Departments

      Notes and Queries - September 7, 1872

    • Business and Personal - September 7, 1872

    • Index of Inventions - September 7, 1872

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    September 07, 1872

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