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Scientific American Magazine Vol 48 Issue 17

Scientific American Magazine

Volume 48, Issue 17

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Features

The Ottawa River Dam

Does Good Work Pay?

Relative Costs of Street Lighting by Electricity and Gas in New York

The Great Bridge Almost Completed

Making a Drill Chuck

Aspects of the Planets for May

Seals in Long Island Sound

H. C. Hovey

An Artificial Aurora Borealis

Bulkheads for Steamships

Piefke's Filter

The Hudson River Tunnel

Mice-Girdled Trees

Improvement in Tunnel and House Building

Automatic Four-Roller Mill

Physics Without Apparatus

Manufacture of Charcoal

Agricultural Inventions

Mechanical Inventions

Engineering Inventions

Miscellaneous Inventions

Communications Received

Departments

Recent Inventions

Notes and Queries

Business and Personal

New Books and Publications

Index of Inventions