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    Features

    Improved Planing and Matching Machine

    Improved Shot Pouch Sling

    Don't Kiss the Baby!

    The Vacuum an Absolute Non-Conductor of Electricity

    Temperature of Ignition of Charcoal

    Postal Detective Service

    Scientific Facts and Speculations

    Seeing Through Colored Glasses

    The Underground Railway, New York City

    NUMBER VII.

    Road and Farm Locomotives and Steam Road Rollers

    Finishing Locomotive Wheels

    Wool Washing Machinery

    New Swimming Bath in London

    Astronomical Notes

    Glue

    Decisions of the Courts

    United States Circuit Court.--District of Massachusetts.

    Recent American and Foreign Patents - January 2, 1875

    Repeal of Patents--Opinion of the Attorney General

    Answers to Correspondents - January 2, 1875

    Communications Received - January 2, 1875

    Canadian Patents - January 2, 1875

    Departments

    • Recommended

      New Books and Publications - January 2, 1875

    • Departments

      Business and Personal - January 2, 1875

    • Index of Inventions - January 2, 1875

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    January 02, 1875