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The “Santos-Dumont No. 5”

An Universal Alphabet

By J. C. Ruppenthal

Directions for making “The Rope Cyclist” Lantern Slide

By Theodore Brown

Groundnuts and Groundnut Oil

Reclaiming the Zuider Zee

Tide Mills

Hydraulic Capstan for the Mersey Docks

New Form of Charter Gas Engine

Vitrified Quartz

Marketing and Preserving Eggs

Household Tests for the Detection of Oleomargarine and Renovated Butter

By G. E. Patrick

The German Colony of Togo

Some Advances made in Astronomical Science during the Nineteenth Century

A Field-Piece with a Tubular Carriage

A Mattress Boat

The Series Alternating System

Contemporary Electrical Science

A New use for Calcium Carbide

Trade Suggestions from United States Consuls


Selected Formulæ


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