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
The Mechanism of Progress
A Theory of Inventiveness
An Electro-Magnetic Sounding Apparatus
by the Berlin Correspondent of the Scientific American
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 Box with Secret Opening
A Suggested Improvement in Aeroplanes
Velocity and Stability
