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The Paris Fire Department: Its Latest Equipment

Downwardly Converging Tandem Planes

A Promising Development on the Basis of Eiffel's Work

By Robert D. Andrews

Power from Powdered Peat

By J. McWilliam

Sinhalese Iron and Steel of Ancient Origin—IV

Beginnings of the Iron Age

By Robert Hadfield

Internal Combustion Engine Locomotives

Their Use and Possibilities

Recent Progress in Illumination

Report of a Committee Appointed by the Illuminating Engineering Society

A Sixty Thousand Horse-Power Blast Furnace Gas Engine Plant

Electrical Generating Units and Blast Furnace and Converter Blowing Engines

By C. Tupper

The Planet Mars

The Reality of Its Markings

By James H. Worthington

Weighing the Atom

Sir J. J. Thomson's New Method of Chemical Analysis

By F. W. Aston

Safety First—I

Accident Prevention on Railroads


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