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SA Supplements Vol 63 Issue 1634supp

SA Supplements

Volume 63, Issue 1634supp

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Features

How Coke is Made

The Behavior of Thin Aluminium Foil in Electrostatic Fields

Multiplex Telephony

Charles S. Walden

Radioactivity and Atmospheric Electricity

H. Geitel

How to Construct a Speaking Arc

A. Frederick Collins

The use of Alcohol and Gasoline in Farm Engines

C. E. Lucke, S. M. Woodward

Rate of Recession of Niagara Falls.—II

G. K. Gilbert

Agnes Mary Clerke

E. A. Dent

Forms for Concrete Construction

Sanford E. Thompson

Science Notes

Electrical Notes

Trade Notes and Recipes