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Features

Admiral Colomb on the Spanish War

New York Truant School

A Gross Violation of Principle

The Great Central Railway of England

Geographical Names as Legitimate Trade Marks

Testing Acetylene Generators

Insect Migrations

By C. F. Holder

Trick Wood Joining

The Multiphone

A Machine for Filtering Liquids

A Simple Pipe-Hanger

An Improvement in Smoke-Consumers

The Improved Turrets of the Battleship "Texas"

By Robert W. Henderson

Quadruple Compound Harmonic Motion

By M. J. Hoferer

The Late Prof. O. C. Marsh

Telephotography

To Inventors - April 1, 1899

Departments

  • Letters

    Correspondence - April 1, 1899

  • Recommended

    New Books, Etc. - April 1, 1899

  • Departments

    Recently Patented Inventions - April 1, 1899

  • Business and Personal - April 1, 1899

  • Notes and Queries - April 1, 1899

  • Index of Inventions - April 1, 1899

  • Patents - April 1, 1899

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis