New York's Radio Pilot Cable, To Preserve a Beautiful and Historic Work and more

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

How a State May Grow a Timber Supply

Varying the Airplane Propeller Pitch, Joseph Norman Lockyer, K. C. B. and more

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