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The Rise of Navigation

Slow Steps by which the Science Has Been Developed

By R. H. Curtiss

Map making from the Sky

Camera now Most Important means of making War Maps

Muck Formation in the Klondike

Salvage of Ships in Great Britain

The Movements of Oil and Gas through Rocks

Geological Factors That Influence the Phenomena

By Victor Ziegler

Fluorides as Timber Preservatives

Typical Scenes in a Steel Plant

Some of the Processes in the Manufacture of Iron and Steel

Dellwik Process for Completely Gassifying Coal

Utilization of Rice and its By-Products

“Soil Sickness” Researches

The Rhone River Project

Batik Dyeing Process

Cadmium as Tin Substitute in Solder

Liquid Crystals

Sound Steel by Lateral Compression

Experiments with a View to Eliminate Waste

By Benjamin Talbot

Chemical Analysis by a Magnetic Process

Propagation of Flames through Tubes of small Diameter

Coal used by Railroads

Some Cotton Seed Products

In their Relation to Present-Day Needs

By C. De Segundo

Hardness and Viscosity of Varnish

Single-Impulse Instantaneous Photography

The Smithsonian “Solar Constant” Expedition to Calama, Chile

By C. G. Abbot

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    December 14, 1918

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