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Features

The Spanish Ship of War Pelayo

Steam Lifeboat

The Resistance of Slide Valves

Railroads in New Regions

The New Magazine Gun used by the German Army

Zincography and Zinco Printing Plates

Liquid Fuel

Vinegar

Improved Warping Machine

By Robert Hall

The Sulphur Industry of the United States

By Harry C. Myers

Quick Setting Cement

Manufacture of Oil of Sassafras

By Thomas C. Harris

The Air Brush

The Significance of Uric Acid

An Improvement in the Production of Sulphuric Acid

By H. Sprengel

Fluorine by the Electrolysis of Hydrogen Fluoride

Methylal

By B. W. Richardson

Prof. S. P. Thompson's Dynamo Telephones

The Montaud Accumulator

Natural Solutions of Cinnabar, Gold, and Associated Sulphides

By George F. Becker

The Medico-Legal Aspects of Hypnotism

On Some Phenomena Connected with the Freezing of Aerated Water

Departments

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April 02, 1887

Think Outside the Gift Box