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Scientific American Magazine Vol 97 Issue 2

Scientific American Magazine

Volume 97, Issue 2

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Features

The Steel Rail Problem

Electric Power Plants are Responsible

Navy to Build “Octopus” Type of Submarine

Contract Awarded for Two Dreadnoughts

Board of Underwriters on Cement Construction

Gasoline Motor Cars Adopted for Branch Line Service on the Union Pacific Railroad

The Grand Prix International Automobile Race

A Traction Wheel with Sinusoidal Tread

Sand Painting

The Riddle of Mars

How Linoleums and Oilcloths are Made

Captive Balloons in the German Army and Navy

Alfred Gradenwitz

Some Interesting Tricks

An Improved Button Latch

Patent Department

The Plug Puzzle

Railway Track Construction

Apparatus for Sustaining and Directing Balloons

Departments

Correspondence - July 13, 1907

Recently Patented Inventions - July 13, 1907

Notes and Queries - July 13, 1907

New Books, Etc. - July 13, 1907

Index of Inventions - July 13, 1907

Patents - July 13, 1907