Volume 69, Issue 1791supp
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Features
Sven Hedin's “Trans-Himalaya”
Discoveries and Adventures in Tibet
The Ancient and the Modern Abacus
The Oldest Counting Machine
Story of the “Pourquoi-Pas”
The French Antarctic Expedition
An Electro-Magnetic Sounding Apparatus
by the Berlin Correspondent of the Scientific American
The Mechanism of Progress
A Theory of Inventiveness
Modern Stereotypy
The Mechanics of the Newspaper
Wind Statistics for Aeronauts
Substitutes for Rubber
Artificial Compounds
Mechanical Oddities
Clever Inventions
The Design of Aeroplane Motors
A Critique of Engines
A Suggested Improvement in Aeroplanes
Velocity and Stability