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Scientific American Magazine Vol 100 Issue 13

Scientific American Magazine

Volume 100, Issue 13

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Features

Rainmaking by Dynamite

The Highway and the Automobile

Close of the Fourth Dimension Contest

The Scientific American Flying Machine Trophy for 1909

Electricity - March 27, 1909

Science - March 27, 1909

Aeronautics

The Mercury Telescope

R. W. Wood

Superiority of Lock to Sea-Level Canal

Governmental Income and Outgo

The Navy's Dummy Drill Gun

Walter L. Beasley

The Ice of the Arctic Waters

Day Allen Willey

Tobogganing at Caux, Switzerland

Deshler Welch

Apparatus for Treating Rubber

Valve for Flush Tanks

Adjustable Head for Piano Hammers

Engine Aliner

Patent Department - March 27, 1909

Improved Oar Lock

Oddities in Inventions

Pneumatic Milk Can

Kitchen Sink Cover

Reciprocity in Patent Laws

The German Crown Prince as an Inventor

Departments

Correspondence - March 27, 1909

Recently Patented Inventions - March 27, 1909

Notes and Queries - March 27, 1909

New Books, Etc. - March 27, 1909

Patents - March 27, 1909

Index of Inventions - March 27, 1909