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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

Indian Ink Manufacture

How Cloth is Dyed Several Colors at Once

Selected Formulæ

Photography in Colors

Miscellaneous Notes

Engineering Notes

Electrical Notes

The English Mission to Harrar

The Future of Central America

By John Rice Chandler

How to Avoid taking Cold

Remarkable Explorations in Babylonia

Driving Ostriches

The Surgical Status of the Bicycle

The Intelligence of Ants

To the Editor of the Scientific American:

Animal Colonies and the Formation of Organisms

Trevoria Chloris

American Tea Culture

Vitality of Seeds

Life on the Planets

By M. J. Janssen

Patents!

Departments

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    July 24, 1897

    Think Outside the Gift Box