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SA Supplements Vol 54 Issue 1387supp

SA Supplements

Volume 54, Issue 1387supp

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Features

The German Industrial Exposition at Duesseldorf

Frank C. Perkins

The Cape to Cairo Railway

A New Safety Signal System for Repeating Railway Danger Signals Visibly and Audibly in the Locomotive Cab

A Contractor's appliance

Electric Waves and their Effect on the Human Brain

How to make a Dry Battery

William A. Del Mar

Electric Coal Cutter

Automobilism in Prussia

I.—the motor-carriage exposition at berlin

History of the Invention of Incandescent Gas-Lighting

Auer Von Welsbach

Medical Literature

Sisal Hemp Culture in Yucatan

Charles Richards Dodge

Problems in the Chemistry and Toxicology of Plant Substances

Egyptians' Eye for Nature

Radio-Activity of Thorium Compounds

Preparation of new Electrolytes, with Base of Carbonates Dissolved in Organic acids, and Chlorides, or Organic Acids and Alkalies

Printing Stereoscopic Positives upon Glass without Transposition

Why is New Bread Indigestible?

Bird Migration and Bird Song

The Electrolytic Production of Chlorates

John B. C. Kershaw

Trade Suggestions from United States Consuls

Departments

Patents - August 2, 1902