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The Otto Gas Engine

By Otto V. Linford

The Panama Ship Canal

New 43-Ton Breech-Loading Gun

Driven Wells for Fire Purposes

Specifications of New Steamer for the Mexican National Construction Company

Storing Compressed Air or Gas

The Manufacture and Uses of Cast Steel

Iron and Steel under the “Hay Process.”

By A. T. Hay

A Cement Wanted

English Railway Speeds

How Sluice Mining Originated

Simple Holtz Electrical Machine.—Curative Applications of Static Electricity

By Geo. M. Hopkins

Electricity in the Card-Room

Schoenbein's Ozonometer for February and March, 1881

Apparatus for Testing the Tensile Strength of Cements

The Quadrature of the Circle

The Density and Tension of Saturated Vapors

Uninflammable Fabrics

Aural Symptoms in Bright's Disease

The New System of Mathematics

The Chime at St Germain L'auxerrois

Silk-Producing Bombyces Reared in 1880

By Alfred Wailly

Archæological Explorations near Madisonville, Ohio

The Mode of Flight of the Albatross

Patents

Butter and Butter-Making

Departments

  • The Grapes of California

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Why Do Facts Fail?

Why Do Facts Fail?

Deconstructing Denial