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The Mechanics of Earthquakes

Recent Views with Regard to the Nature of Seismic Disturbances

By Carlo Somigliana

Emergency Seasoning of Sitka Spruce

Strength of Kiln-dried and Air-dried Spruce Compared

By L. A. Welo

Different Types of Airship

Economics of Transportation in the Mississippi Valley

Develop Southern Ports for Foreign Trade by Revising Interior Transportation

By J. R. Bibbins

Electric Propulsion for the U. S. S. New Mexico—III

The Main Control Equipment, Centralized and Flexible

By C. T. Hentschel

The Color of Water

By Wilder D. Bancroft

Paper Woven Goods in Austria-Hungary

Improved Lighting by Street Lanterns

By F. Brueggeman

Finding the Apparent Angular Movement of the Sun Between the Solstices

Winds and the Transatlantic Flight

Speed Measuring Instruments for Aeroplanes

Metal Strapping on Wooden Boxes

Advance in the Design of X-Ray Tubes

Plywood in Aeroplane Construction

The Scientific American Supplement Index for vol. 87

Applications of Kirchoff's Law

Discharges of Atmospheric Electricity

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  • Piezo-Electricity and Its Application

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June 28, 1919

Think Outside the Gift Box