SA Supplements

May 1906

Volume 61, Issue 1585supp

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Features

Science Notes

Stereoscopic Methods of Surveying

The use of the Periscope in Submarine Torpedo Boats

Locomotive Superheaters—Practical Difficulties in the use of Superheated Steam

Safety Catch for Doors

Why Brass Valves Leak

The Intensity of Pressure of Wheels on the Road

The Journaux Tractocycle

The Governing of Gas Engines

The Specific Heat of Iron at High Temperatures

Specific Heat of Superheated Steam

Reservoir, Fountain, and Stylographic Pens—VI

James P. Maginnis

Manufacture of Gun-Cotton

The Champagne industry

Consul J. Martin Miller

Mechanical Features of some of the Winning Cars in the Automobile Club of America's Two-Gallon Fuel Contest

Marvels of Minute Writing

What is an Alloy?

A. Humboldt Sexton

The Telephone System of the Future—The Semi-Automatic

Le Roy W. Stanton

Electric Furnace for Research Work at High Temperatures

The Ohm, Volt, and Ampere

A Low-Resistance Thermo-Electric Pyrometer and Compensator

William H. Bristol

Times and Places of Earthquakes

H. H. Turner