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Features

Single Rail Railways—The Behr System

The Manchurian Railway

Hurdy-Gurdy or Tangential Water Wheels

By Philip R. Bjorling

The Coefficient of Traction of Carriages

Six N. H. P. Traction Engine

How Cloth is Dyed Several Colors at Once

Photography in Colors

Indian Ink Manufacture

Selected Formulæ

Electrical Notes

Engineering Notes

Miscellaneous Notes

The English Mission to Harrar

How to Avoid taking Cold

The Future of Central America

By John Rice Chandler

The Surgical Status of the Bicycle

Remarkable Explorations in Babylonia

Driving Ostriches

The Intelligence of Ants

To the Editor of the Scientific American:

Animal Colonies and the Formation of Organisms

American Tea Culture

Trevoria Chloris

Vitality of Seeds

Life on the Planets

By M. J. Janssen

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