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SA Supplements Vol 56 Issue 1453supp

SA Supplements

Volume 56, Issue 1453supp

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Features

Mountaineering in England

Contemporary Electrical Science

Operation of Gas Ranges

Electric Automobiles

Destruction of Insects—A New use for Electricity

Some Experiments on the Electrical Conductivity of Atmospheric Air

J. C. McLennan

The De Mare Electro-Thermic Fan

Emile Guarini

The Light Aluminium Alloys

Joseph W. Richards

Treatment of Finely Divided Iron Ore

How Woven Hose is Made

Day Allen Willey

On the Intensely Penetrating Rays of Radium

R. J. Strutt

The Columbarium of the Vigna Codini, Rome

The Lacto-Viscometer

Geography

Ettrick W. Creak

The Amherst College Observatory

Mary Proctor

The Engineering Standards Committee

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

One-Wheel Watch

Engineering Notes

Trade Notes and Recipes

Miscellaneous Notes

Trade Suggestions from United States Consuls

Selected Formulæ