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His Holiness Pope Leo XIII

Self-Igniting Devices for Coal-Gas

Machine for Carving Wood Moldings

American Railway Equipment

Marine Engines

Kerosene Vs. Gasoline

By A. E. Potter

Aberration of the Sphericity of the Eye

Vanadium Steel

The Simplex Spraying Nozzle and Water Cooling System

The World's Coal Production

Industrial Application of the Diastases: The most Recent Discoveries

Some Details of the Paris-Madrid Racing Automobiles

Specially Prepared for the Scientific American Supplement by our Paris Correspondent

Direct Production of X-Rays in the Air

Trade Suggestions from United States Consuls

Electrical Notes

Trade Notes and Recipes

Engineering Notes

A Simple Circular Computing Scale

By James Alex Smith

The Submarine Boats “Pike” and “Grampus”

Electric Sodium Manufacture in Germany

Hertzian Wave Telegraphy

Dr. Fleming's Third Paper

Investigations in Phonograph Phenomena

The Origin of the Diamond

By E. M. Souvielle

In the Heart of Thibet


Selected Formulæ


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    July 18, 1903

    Science for the Modern World