The Psycholoǵy of Liǵht.—I
The Subjective Aspect of Optics
The Subjective Aspect of Optics
How Speed and Cleanliness are Secured
Using Superheated Water in Place of a Coal Fire
Its Cause and Mode of Propagation
Novel Theory Advanced—Hints for Aviators
Nature as an Aeronautical Engineer
The Sixty-inch Reflector of the Mount Wilson Observatory
Government Aid for the Man Out-of-WorK
An Investigation of the Air Pressure on Aeroplane Surfaces
Their Use in Multiplex Telephony and Telegraphy
Their Reaction to Various Stimuli