Features
Electricity in Agriculture
Animal Life at the Front
The Concrete Ship Problem
A Review of Facts Developed in Recent Discussions
Irrigation in Mesopotamia
The Bird Cult of Easter Island
Gravitation—II
And the Principle of Relativity
New Radiographic Method
The making of Monster Guns
The National Electric Safety Code
Rescuing the Art Treasures of Venetia—I
From the Air Raids of the Austrians
Skin Cancer
The Manufacture and use of Die-Castings
An Important Industry of Recent Development
The Infectivity of Trench Fever
Blast-Furnace “Bears”
The Relationship of the Most Ancient Flint Implements
To the Later River-Drift Palreoliths
Electricity in Medicine
Diathermy And Radiography
Toxin Production in the Soil by Growing Plants
Improving the Sugar Beet in Europe
Industrial use of Grapevine Branches
A Study of the Proteins of Certain Insects
With Reference to their Value as Food for Poultry
Methods for Cutting Glass Discs
Heat Treatment of Steel
Effect of a Mass
