Features
The New Star in Gemini
The Spectroscope Reveals High Temperature and Pressure
High-Pressure Incandescent Gas Lighting
By the Paris Correspondent of the Scientific American
The Manufacture and Application of Nitrous Oxide—II
Testing and Judging Kinematograph Films
The Measurement of Velocities
A Survey of Various Devices Used
The Hooded Seal of the North Atlantic
One of the Most Important Industries of Newfoundland
Tracking Wild Animals by their Spoor
An Attractive Field of Observation
The Light Quantity Hypothesis
New Ideas as to the Atomic Nature of Radiant Energy Which Promises Solutions of Many Difficulties
Trisecting a Given Angle
A Mechanical Solution
The Resources of Tripolitania and Cyrenaica
Economic Importance of the Territory Invaded by Italy
Manufacture and Treatment of Steel for Guns—I
An Industry of About Thirty Years Standing
