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SA Supplements Vol 47 Issue 1225supp

SA Supplements

Volume 47, Issue 1225supp

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Features

Boston's Free Municipal Bathing Plant

J. A. Stewart

The Physiological Basis of Mental Life

Women Inventors

George Ethelbert Walsh

Origin of Arabic Numbers

Mechanical Influence in Architecture

Motor Vehicles for Heavy Loads

The Purification of Acetylene

P. Wolff

Engineering Notes

Miscellaneous Notes

Electrical Notes

Trade Suggestions from United States Consuls

A Seismological Observatory and its Objects

John Milne

The Cave of Padirac

Flexible Films for Spectroscopic Photography

Curious Effect of Mental Suggestion

Puma-Leopard in the Zoological Garden at Berlin

The Forest Tent Caterpillar

Clarence M. Weed

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

Plan for the Widening of New York East Side Streets

N. J. Vander Weyde

Automatic Stop Brake for Vehicles

A New Primary Battery Cell of Large Capacity and High Economy

Patents!

The Scientific American Supplement. Index for vol. 47

How to Figure a Chainless Gear

Radiation of Luminous Paint