Features
Tests for Lubricating Oils
Casein in Celluloid
New Metallothermic Reactions
The Conduction of Electricity
An Engineering Explanation of the Ionic Theory.
Oxhydric Process of Cutting Metals—III
Torches and Machines that Cut Steel
The Forerunners of the Metallic Filament Incandescent Lamp
Canning and Preserving Fruit.—IV
Hints for the Housewife
M. Louis Bleriot and his Aeroplanes
Full Description of the Latest Successful Monoplanes of this Celebrated French Engineer.
The Sense of Direction in Bees
Remedies for Old Age
Palæolithic Man
His Present Scientific Status
New Radioactive Phenomena
The Radiation of Metallic Plates Bombarded by Beta Rays.
Atmospheric Circulation
How Cyclones and Anti-Cyclones are Formed.
Imitation Arms and Armor
How to mare them at Home.
Conjurers of the Past
Precursors of the Modern Magician.
The Rotation of the Earth
How it is Mechanically Proved by Blum's Apparatus
