Features
Gas Engine Versus Steam Engine
The Role Which the Motor Truck Can Play in Transportation, as Indicated by California's Experience
A Neat Problem in Hydraulics
How the Delaware River Was Held at Bay During the Construction of the Naval Drydock at Philadelphia
Varying the Airplane Propeller Pitch, Joseph Norman Lockyer, K. C. B. and more
How a State May Grow a Timber Supply
What Has Been Said About Einstein
A Review of the More Important Popular and Semi-Popular Books and Articles in English
Fire Without Firemen
How the Coal Is Fed Mechanically to the Huge Grates Beneath the Modern Boiler
Oil as a Locomotive Fuel
Wood That Is Stronger Than Steel
How Thin Veneers and Water-Proof Glue Have Conspired to Build a New Industry
Items In Brief
A Department Devoted to Current News in All Fields of Pure and Applied Science
Departments
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Correspondence - August 28, 1920
Inventions New and Interesting - August 28, 1920