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Boston's Free Municipal Bathing Plant

By J. A. Stewart

The Physiological Basis of Mental Life

Origin of Arabic Numbers

Women Inventors

By George Ethelbert Walsh

Mechanical Influence in Architecture

The Purification of Acetylene

By P. Wolff

Motor Vehicles for Heavy Loads

Engineering Notes

Miscellaneous Notes

Electrical Notes

Trade Suggestions from United States Consuls

A Seismological Observatory and its Objects

By John Milne

The Cave of Padirac

Flexible Films for Spectroscopic Photography

Puma-Leopard in the Zoological Garden at Berlin

Curious Effect of Mental Suggestion

The Forest Tent Caterpillar

By Clarence M. Weed

Plan for the Widening of New York East Side Streets

By N. J. Vander Weyde

Comparative Costs of Cable, Electric, and Horse Traction in New York

Automatic Stop Brake for Vehicles

A New Primary Battery Cell of Large Capacity and High Economy

Patents!

How to Figure a Chainless Gear

The Scientific American Supplement. Index for vol. 47

Radiation of Luminous Paint

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    June 24, 1899

    Complex Causes. Alternative Solutions.