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Features

The Langley Aerodrome

Improvements in the Methods of Quarrying Slate

Amber, the Gold of the North

The Peanut

The Washington Incandescent Petroleum Gas Light

The Preservation of Fruit Juices

The Conversion of Amorphous Carbon to Graphite

By Francis J. FitzGerald

Chinese Vegetable Wax

Where do the Pins Go?

Electrolytic Refining of Copper

Long Spans for Overhead Electric Cables

Electrically-Driven Pumps

Electrical Conductivity of Certain Aluminium Alloys as Affected by Exposure to London Atmosphere

Copper-Plating Metals by the Dessolle Process

The Utilization of Wastes and By-Products in Manufactures

With Special Reference to the Decade of 1890-1900

By Henry G. Kittredge

London Air and London Fog

The Study of the Upper Atmosphere

Mineral Production of the United States in 1901

The Candied Fruit Trade of Provence

The “Fiend-Fly.”

Python Swallowing a Suckling Pig

Prehistoric Civilizations of America

By Eduard Seler

Recent Discoveries of the Missione Italiana in Crete

Photophonic Books for the Blind

By V. De Turine

Gold Mining in Egypt

Why Coal is Washed

When Coal was Currency

By F. E. Saward

The Work of George Graham—An Unknown Astronomical Clockmaker

Selected Formulæ

Trade Suggestions from United States Consuls

Patents!

Trade Notes and Recipes

Departments

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    December 06, 1902

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