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    Bartlett and Boomer's Extension Hemmer

    Improved Wheat Steamer and Dryer

    One Hundred Thousand Dollars Reward for a New Plan for Canal Propulsion

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    By S. Lockwood

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    The Removal of the Hell Gate Obstructions

    One Hundred Thousand Dollars Reward for a New Invention for Propelling Canal Boats

    Inspection of Steam Boilers

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    Scientific Intelligence- May 6, 1871

    More Humorous than Scientific

    Are Noisome Effluvia Injurious to Health?

    Answers to Correspondence- May 6, 1871

    Queries- May 6, 1871

    Recent American and Foreign Patents- May 6, 1871

    Official List of Patents- May 6, 1871

    Issued by the U. S. Patent Office

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    • Letters

      Correspondence- May 6, 1871

    • Recommended

      New Books and Publications- May 6, 1871

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      Business and Personal- May 6, 1871

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    May 06, 1871

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