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Features

Effect of Motors on Macadam Roads

How Cars Ought to be Designed to Preserve Roads

The Walnut Lane, Philadelphia, Bridge

A Majestic Concrete Structure

By Frederic Blount Warren

Electric Furnaces in Germany

What it Cost to Reduce ores Electricity

Blau Gas, a New Gas for Illuminating, Heating, and Power Purposes

The lift and drift of arched surfaces

How they Behave in a Uniform Current of Air

By Matthew Bacon Sellers

The Lentz Axial Governor

The burglar and the safe maker

An Electrical Guard of Simple Construction

By George P. Pearce

Morden Ordance

Some Wonderful Weapons Exhibited at the Franco-British Exhibition

Battles in he Sky

The Military Utility of the airship

By Goebel

Coal-Washing Jigs

Some Further Improvements

By E. J. Munby

The Ringed and Smooth Snakes

The Markings of Two Harmless Snakes

By G. A. Boulenger

A scientific argument against gambling

chinese cattle

The World's production of coal

Cost of concrete flooring

The cat and the plague

The Turnover filter

Electrical notes

Engineering notes

Science notes

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