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Scientific American Magazine Vol 98 Issue 4

Scientific American Magazine

Volume 98, Issue 4

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Features

Pure Hydrogen from Carbides

Panama Canal to Cost $300,000,000?

Great Increase in Transatlantic Travel

The Pennsylvania Tunnel Excavation Beneath Manhattan Completed

The Farman Aeroplane Wins the Deutsch-Archdeacon Prize

The Pacific Scientific Institution of Honolulu

International Investigation of the Upper Air

The Current Supplement

The Patent Office in 1907

A Unique Aerial Tramway Used in the Construction of Chicago's Lake Tunnel

A Photographic Method of Producing Bas-Reliefs

Alfred Gradenwitz

The Reuterdahl Attack on Our Navy

Insects That Are Eaten

Percy Collins

Device for Pulling Spokes

An Improved Bale Tie

An Improved Portable Concrete Mixer

An Apparatus for Electrically Transmitting Sight

Departments

Correspondence - January 25, 1908

Recently Patented Inventions - January 25, 1908

Notes and Queries - January 25, 1908

New Books, Etc.

Index of Inventions - January 25, 1908

Patents - January 25, 1908