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Features

Nickel Steel in Boiler Construction

Weight of Mail Matter in the United States

Trolley Cars on Grades

The Statistics of our Vast Railroad System

Copper Coins Melted up

The American Association for the Advancement of Science

By Horace C. Hovey

The Allegheny Observatory Objective

A New Acetylene Gas Generator

An Improvement in Rotary Engines

An Ingenious Mowing-Machine-Sickle Grinder

Present and Proposed Cruisers of the United States Navy Compared

Ice Manufacture on a New System

Removal of a Famous Engineering Landmark

The Last Eruption of Mauna Loa

By Enos Brown

Ancient Egyptian Versus Modern Pin Locks

To Inventors - September 2, 1899

Departments

  • Recommended

    New Books, Etc.- September 2,1899

  • Departments

    Business and Personal - September 2, 1899

  • Recently Patented Inventions - September 02, 1899

  • Notes and Queries - September 2, 1899

  • Index of Inventions - September 2, 1899

  • Patents - September 2, 1899

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September 02, 1899