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Features

The Electric Lighting Station of Tunis

By Emile Guarini

A Great Concrete Arch in Germany

The Catfish and its Habits

Sarsen Stones

Recent Aeronautical Progress, and Deductions to be Drawn Therefrom, regarding the Future of Aerial Navigation

By B. F. S. Baden-Powell

Tangential Waterwheel Efficiencies

Being An' Experimental Investigation of the Relative Values of Ntffekent Bucket Shapes

By George J. Henry

Origin and Development of Armored Concrete

Statistics of the Krupp Works

The Relations between Scientific Research and Chemical Industry

New Mordanting Process

Radium in Medicine

By Samuel G. Tracy

The Colossal Cavern of Kentucky

By Horace C. Hovey

An Experimental Investigation of the Pressure of Light

By Peter Lebedew

The Camphor Industry of Formosa

By A. Frederick Collins

Contemporary Electrical Science

Transportable Generators of Electricity with Alcohol Motors

Hydraulic Coal Hoist for Discharging Coal into Ships' Holds

Propagating Oyster Germs

Electrical Notes

Trade Notes and Recipes

Engineering Notes

Trade Suggestions from United States Consuls

Selected Formulæ

Departments

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November 21, 1903

Think Outside the Gift Box