Features
Interborough Rapid Transit Company Test of Subway Engines
A Cheap and Simple Compensation Pendulum
The use of Alcohol as Fuel for Internal-Combustion Motors
Benjamin Franklin and Electricity
Efficiencies
Single-Phase Alternating-Current Railway Work
The Physics of Ore Flotation
A Hand Camera Capable of Conversion into an Enlarging and Projecting Apparatus
How Brilliant Metallic Surfaces are Formed on Pottery
A Miniature Caloric Engine
The Fixation of Atmospheric Nitrogen
The Changes in the Nerve and Muscle which Seem to Underlie the Electrotonic Effects of the Galvanic Current
A New Standard of Light
A Novel Method of Determining the Elements of the Earth's Orbit
Our Berlin Correspondent
Methods of Transportation among Insects
Principles of Success in Concrete Block Manufacture
Use of Diamonds in the Industries
Diamond Tools
