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The Propulsion of Ships

A Subject that Demands Much Further Investigation

By A. T. Wall

An Unusual Exhibition of Spider Webs

Treatment of Frozen Potatoes

Dr. Johnson on Aeronautics

By W. H. Thorpe

Cave Dwellers of the Missouri Valley

A Mysterious Race of Undetermined Origin

Imbibition Exhibited by some Shellac Derivatives

Theories and Problems Relating to Musical Sands

By Cecil Carus-Wilson

Researches upon Antiseptics

Gasoline's Part in the Great War

Failure For a Day Would Cause Serious Results

By Albert Lidgett

Sources of Potash

By T. E. Thorpe

Making Anti-Toxins for War Use

At the Laboratories of the University of Toronto

Medicine and the Military Death Rate

The Hardening of Steel by Chromium and Copper

By L. Grenet

The Causes of Disease—I

An Attempt at Classification with A View to Prevention

By Ernest S. Reynolds

A Compound Harmonic Motion Machine—II

Adapted for Drawing Any Predetermined Curve with Mathematical Accuracy

By William F. Rigge

Inducing Rain by Electricity

Transmission of the Trematode in Venezuela

Restoration of Materials after Fires

Modern Methods of Salving

Seditious Publications in the Public Library

Peanut Oil in France


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