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A New Trans-African Railroad from the Atlantic Seaboard to Lake Tanganyika

The English Correspondent of Scientific American

Indirect Methods in Astronomy

The Castelin Automobile Plow

The Paris Correspondent of Scientific American

Radiotelegraphy by Continuous Electrical Oscillations

The Electro-Chemical and Electro-Metallurgical industries in 1906

By John B. C. Kershaw

Practical Directions for Making Papier Mache Buttons

The Importance and Manufacture of Meat Extract

The Recent Derailment and Wreck on the New York Central Railroad

Schedule Weights of Steel and Iron Plates

Gas Engines and Marine Propulsion

The Limits of Thermal Efficiency in Internal Combustion Engines

The Recent Determination of the Figure and Size of the Earth from Measurements in the United States

The Schultze Manograph for Taking Indicator Cards of Gasoline Engines

The Paris Correspondent of Scientific American

Hybridization of the Oaks

By D. T. MacDougal

The Fear of Open and Closed Spaces

By Charles Mercier

Atmospheric Dust

Trade Notes and Formulæ

Engineering Notes

Science Notes

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    March 23, 1907

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