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Features

Hardening Hydraulic Cements.–II

A description of an New process

By W. Michaelis

Different Methods of Impact Testing on Notched Bars

Scientific Boiler Control

An Improved Planetarium

An Apparatus for Studying the Motions of the Planets

Poppy Culture and Opium Manufacture in India

Utilizing Waste Wood.–II

Destructive Distillation; The Recovery of Turpentine and other Products

By F. P. Veitch

Loading and Conveying Plants in German Gas Works

The English Correspondent of the Scientifc American

Paper-making materials

suggestions for, the manufacturer

By F. P. Veitch

A Brief History of Wireless Telegraphy

Milestones in the Evolution of a new Art

By R. A. Fessenden

The Low-Pressure Steam Turbine and its Economical Utilization

By Charles B. Burleigh

Earthquakes and Volcanoes

Our Unstable Earth

By W. F. Stanley

Acetone Gas for Lighthouses

Association for Advancement of Science

The Proceedings of the Baltimore Meeting

By William H. Hale

Engineering Notes

Science Notes

Trade Notes and Formulæ

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    January 16, 1909

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