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Features

Trolley Cars on Grades

Nickel Steel in Boiler Construction

Weight of Mail Matter in the United States

The Statistics of our Vast Railroad System

The Allegheny Observatory Objective

The American Association for the Advancement of Science

By Horace C. Hovey

Copper Coins Melted up

An Ingenious Mowing-Machine-Sickle Grinder

A New Acetylene Gas Generator

An Improvement in Rotary Engines

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

  • Notes and Queries - September 2, 1899

  • Recently Patented Inventions - September 02, 1899

  • Index of Inventions - September 2, 1899

  • Patents - September 2, 1899

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