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Features

Value of Rare Earths for Electrical Purposes

Perhydrase Milk-A New Sterilized Milk

Large Powder Chambers and Gun Erosion

Recent Performances of the French Airship "Patrie"

By the Paris Correspondent of the Scientific American

Facts about Black Lead Pencils

By Katherine B. Calhoun

Climate: Past and Present

The Yawning Cure for Throat Diseases

The Current Supplement

Recent Progress in Wireless Telephony

By Reginald A. Fessenden

The Launch of the "Satsuma"

A Machine that Predicts Tides

By D. A. Willey

Opening of Electric Service on the New York Central and the New Haven Railroads

Some Facts about Tea

By L. Lodian

Snow Shoes for Wagons

Patent Department

An Improved Self-Oiling Roller Bearing

Umbrella Frame with Detachable Ribs

Liquid Soap Holder

An Improved Receiver for Telephones

A Handy Portable Crane and Hoist

By A. Frederick Collins

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January 19, 1907

See the World from a Different Perspective

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