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Target Practice in Our Navy, Light on the Seamen's Bill and more

A Contrast in Locomotive Practice

An Engine of To-day and One of Eighty Years Ago

By Herbert T. Walker

The Strategic Moves of the War

Our Military Expert--July 7th, 1915

Disk Talking Machine Records Made By Anyone, United States Battleship "California" and Class

Why Do Men Over Forty Break Down?

By Charles F. Bolduan

Railroads Under and Over the Streets of New York--II

Blasting Tunnels Through the Rocks of Manhattan Difficult Operation of Peeling the Roof off the Existing Subway

The Motor Truck and the Road

Who Should Pay the Road Tax?

By John S. Harwhite

Portable Shield for Soldiers, An Excavating Machine that Walks and more

The Current Supplement


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