The Psycholoǵy of Liǵht.—I
The Subjective Aspect of Optics
Features
Tar as a Fuel for Diesel Enǵines
Modern Methods of Bunkering Steamers
How Speed and Cleanliness are Secured
Fireless Locomotives
Using Superheated Water in Place of a Coal Fire
Some Facts about Malaria
Its Cause and Mode of Propagation
Return Fliǵht of Carrier Piǵeons
Novel Theory Advanced—Hints for Aviators
Insect Aviation
Nature as an Aeronautical Engineer
A Great Modern Telescope
The Sixty-inch Reflector of the Mount Wilson Observatory
Insurance aǵainst Unemployment in France
Government Aid for the Man Out-of-WorK
The Stability of Aeroplanes
An Investigation of the Air Pressure on Aeroplane Surfaces
Distribution of Germs in the Air
Electric Waves Directed by Wires
Their Use in Multiplex Telephony and Telegraphy
The Senses of Plants
Their Reaction to Various Stimuli
