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Features

Fresh-Water Pearl-Button Industry

Italian Bell-Towers

Why Automobiles are Unpopular in Morocco

The World's Debt Increases

Toads in Folklore

Progress of United States in Material Industries

Samsons of the Keyboard

A Simple. form of Fuel Calorimeter

By Charles R. Darling

Return Steam Trap

A Novel Sparking Plug

Cotton Mills of the South

The Electric Anemoscope

The Inherent Nature of Coherers

By Edward P. Thompson

Contemporary Electrical Science

New Compound of Vanadium by Electric Furnaces

New Method of Manipulating Liquefied Gases in Sealed Tubes

By Henri Moissan

Abrasive Metals

Calcium Carbide from Non-Electric Furnaces

Some uses of Electrical Pumping Machinery

The Belgian-Ougree Blast Furnaces and Steel Works and Modern Electrically-Operated Plant

By Frank C. Perkins

Foucault's Pendulum at the Pantheon

Progress of the Year in Astronomy

The Roland Pillars

El Gran Chaco

A Review of the Existing Methods of Cultivating Anaerobic Bacteria

Beplacement of Air by Inert Gases

By Otto F. Hunziker

Treasures of Savages

Trade Notes and Recipes

Advertisements in Nature.—How the Colors of Flowers Attract Insects and Birds

Trade Suggestions from United States Consuls

Selected Formulæ

Patents!

Departments

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