Features
The small Motor Boat
Its Care and Operation
A Profile Tracer
Device for Registering the Undulations of the Ground
Dazzling Headlights
Steam versus Gas Engines
A Graphic Comparison of Two Power Producers
The Conduction of Electricity
Ferguson's Mechanical Paradox
An Ingenious Train of Gears
Martyrs to Science
The Heroism of the Physician
The Origin of Subjective Head Noises
The Automobile on the Farm
The Future of the Earth
Is the Shape of our Globe Changing
The Mimicry of Plants
Some Curious Resemblances
Dr. Sven Hedin on Central Asia
The Record of a Great Achievment
Astronomical Observations
How They are Made
A Convenient Form of Air Thermometer
Electrolytic Refining
An Apparatus for the Treatment of Metals
The Problem of Tele-Vision
A Partial Solution
The “Choralcelo.” A New Musical Instrument
The Voyage of “Zeppelin II”
The Official Report
Thermodynamics in Theory and Practice
Gas Engine Testing Suggestions
