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Features

Grand Central Depot Signal System

Heavy Loss from Lightning Rod Ignorance

The Discovery of Another form of Electricity

Light in Coal Mines

The Origin of Life

Timely Suggestions

The New Phase of Electric Force

King's Improved Support for Printers' Galleys

Acidemetry Applied to the Testing of Vinegar

New Double Shaping Machine

Filters and Liquid Meters

Practical Mechanism - December 25, 1875

Number XXXVIII

By Joshua Rose

American Silk-Spinning Machinery

Improved Universal Wheelwright's Machine

Miller's Recoil Check for Guns

Plant Vases for Indoor Decoration

Greenhouses and Hothouses

New Agricultural Inventions - December 25, 1875

New Household Articles - December 25, 1875

Recent American and Foreign Patents - December 25, 1875

New Chemical and Miscellaneous Inventions

New Mechanical and Engineering Inventions - December 25, 1875

New Woodworking and House and Carriage Building Inventions - December 25, 1875

Communications Received - December 25, 1875

Departments

  • Departments

    Business and Personal - December 25, 1875

  • Index of Inventions - December 25, 1875

  • Notes and Queries - December 25, 1875

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December 25, 1875

Beyond XX and XY

Beyond XX and XY

Biology. Identity. Equality.