Volume 70, Issue 1820supp
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Features
Messier
An Early French Astronomer
Some Simple New Inventions
Suggestions of Many Kinds
“Stellite,” A New Alloy
A Remarkable Metal
Concrete Corncrib and Granary Floors
Telephone Whistle Alarm
Bronzing
Treatment before Bronzing and during the Bronzing Process
The Como Electric System
Powerful Light Motors for Aeroplanes
New Wolseley Engines
New Methods for Generating Hydrogen for Balloons
Treasure Recovery from the Deep
Exploits of the Diver
Mars during the Recent Opposition
An Uneventful Astronomical Event
Field Work in Botany
Practice and Theory of Aviation.—V
The Leading Aeroplanes
A Radium Factory
Physiological Effects of Altitude
A New Field for Investigation
Aeroplanes in Paris.—I
The French Salon