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The Stratifications of Hydrogen

By William Crookes

The Victor Hugo Centenary

A new Carbureter

The new Bermuda Floating Dock

Time Required to Extract Precious Metals

Contemporary Electrical Science

Mine Explosions

A bit of the “Ancient” History of the Isthmian Canal Problem

By John Meikle

The Prince Regent Theater, Munich

Use of Eyeglasses in the Army

Iron and Steel Exports

The Siegfried Performance in Paris

Danish West Indies

On the Cheapest form of Light.—From Studies at the Allegheny Observatory

By S. P. Langley and F. W. Very

Calochortus

Choice of Phosphatic Fertilizers

The Padlocks of Indian Chests

The Hands of the Aye-Aye

The Modern Walls of Jerusalem

The Eastern Interior Coal Fields

Trade Suggestions from United States Consuls

Patents

Selected Formulæ

Departments

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    March 29, 1902

    Help Us Reforest the Mississippi River Valley