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Features

The Pneumatic Despatch System in the Western Union Telegraph Building, New York

How Science is Annihilated

The Industrial Condition of Germany

How a Piece of Coal Burns

Proposed Tunnel under Newark Bay

Up or Down in Rapid Transit?

The Earthquake Indicator

A New Stellar Indicator

Spectroscopic Quantitative Analysis

Underground Refrigerator for Butchers

A Novel Decoy Fish

Machine for Making Fence Pickets

Improved Hoisting Machine

Astronomical Notes - April 10, 1875

The Storage and Handling of Fluids

Improved Circular Saw Table

Improved Windmill

Strasbourg Cathedral and Its Clock

Recent American and Foreign Patents - April 10, 1875

Decisions of the Courts

Canadian Patents - April 10, 1875

Communications Received - April 10, 1875

Departments

  • Letters

    Correspondence - April 10, 1875

  • Departments

    Business and Personal - April 10, 1875

  • Notes and Queries - April 10, 1875

  • Index of Inventions - April 10, 1875

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