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Features

The Heavy-Oil Engine in Marine Service

Its Influence upon Battleship Design

By R. Clifford H. Reid

Conservation and Research

Economies Secured by Scientific Investigation

By Herbert T. Kalmus

The Refinements of Detection

An Ocean Terminal for the South

Texas City Harbor Developments

By L. C. Talmage

Progress in a Puzzling Malady

The Stable Fly as the Carrier of Infantile Paralysis

By Charles T. Brues

Beauty Doctoring

Its Snares and Pitfalls for the Unwary

By Horace Greeley

On the Antiseptic Properties of Spices

Producer Gas for Power Purposes

Chemical Principles and Mechanical Factors in its Manufacture

By H.F. Smith

Aviation To-day

And the Importance of a National Aerodynamic Laboratory

By W. Irving Chambers

The Government and our National Timber

A Defense of the Present Policy

The Origin of Planets and their Satellites

Radiations in Economics

The Lateral Stability of Aeroplanes

By Herbert Chatley

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February 22, 1913

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