The Sidereal Universe—I
Theories Regarding Its Constitution, Structure and Motions
Features
The Gun and the Aeroplane
The Difficulties and Principles of Aiming
The Utilization of Exhaust Steam
Various Ingenious Systems for Promoting Economy of Fuel
Electricity in Agriculture—II
Advantages that Make it a Necessity on a Modem Farm
Heavy Machinery used in Building Automobiles
A Non-Corrosive Alloy
Making Rain by Electricity
Handicapping an Army by Poor Sights
A Remarkable Heating and Ventilating System that Conserves the Comfort of 15,00 Workers
The Lac Insect
The Curious Insect That is the Source of Lac Varnishes
The Trend of Electrical Development
A Discussion of the Limits of Efficiency
Some Features of Road Construction
Road Surfacing and Corrugition
Ductile Tungsten
A Bottle Filling Alarm
Protecting the Frontier
Some Methods of Constructing Trenches
Motor Cars for Railways
Locomotives at the Smithsonian Institution
The Chemical Industries in the United States
A Review of the Situation at the End of the Year 1915
