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Features

Operation of Gas Ranges

Contemporary Electrical Science

Mountaineering in England

Electric Automobiles

Destruction of Insects—A New use for Electricity

Some Experiments on the Electrical Conductivity of Atmospheric Air

By J. C. McLennan

The De Mare Electro-Thermic Fan

By Emile Guarini

The Light Aluminium Alloys

By Joseph W. Richards

Treatment of Finely Divided Iron Ore

How Woven Hose is Made

By Day Allen Willey

On the Intensely Penetrating Rays of Radium

By R. J. Strutt

The Lacto-Viscometer

The Columbarium of the Vigna Codini, Rome

Geography

By Ettrick W. Creak

The Amherst College Observatory

By Mary Proctor

One-Wheel Watch

Practical Hints for Marking Bottles with Etching-Powder and Etching-Ink

The Engineering Standards Committee

Engineering Notes

Trade Notes and Recipes

Miscellaneous Notes

Trade Suggestions from United States Consuls

Selected Formulæ

Departments

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    Why Do Facts Fail?

    Why Do Facts Fail?

    Deconstructing Denial