On the Structure of the Universe—I
The Ultimate Object of Stellar Astronomy
Features
Women as Munitions Makers
Mica from India
The German Potassium Salts
A Fertilizing Material Indispensable to the Agriculturists of the World
Steel in the Light of Modern Research
A 5,000-Volt, Direct Current Electric Railway
Operating Trolley Cars with the Highest Voltage Yet Attempted
Motor Fuels
Vapor Tension and Other Characteristics of a Perfect Fuel
The Zodiacal Light
Zeppelin Bombs
Modern Heavy High Elevation Artillery
New Structural Designs that Have Resulted from New Methods of Use
Gathering Storax from the Sweet Gum Tree
An American Substitue for the Imported Drug
Variable Resistance Helical Spring Gear
The “Wolf Note” on String Instruments Played with a Bow
Combustion of Gasoline
Economies in Operating small Cars
Solving New Problems of Local Transportation
Electro-Photography of Coins or Medals
Explosibility of Mixtures of Natural Gas and Air
Structure of Bud-Scales
Suggestions in Mechanisms
What Can be Done with a Circular Saw
Mount Lasson
Science and the War
Effects of Shell-Fire
How the Various Kinds of Projectiles Work
Electric Welding
The Various Methods in Use and Latest Improvements
