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The War Significance of Cotton, The Navy's Most Pressing Need and more

[Cotton was used to make nitrocellulose--the smokeless "gunpowder" for cartridges and shells]

At the Panama-California Exposition at San Diego

Beautiful Architectural Effects. That Harmonize With Their Picturesque Settings

Aerial Loops at Night, The Current Supplement and more

By J. Cecil Alter

The Strategic Moves of the War

Our Military Expert--June 30th, 1915

Our First Naval Dirigible

An American-Built Airship Possessing Novel Features of Control and of Anchorage

By C. Dienstbach

The New French Battleship "Tourville"

The First Dreadnought to Carry Sixteen Guns in the Main Battery
[note: the ship was planned but never built]

By M. K. Barnett

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

Difficulty of Excavating Subways Through the Heart of a Big City

Systematic Observation of Meteors

An Opportunity for the Amateur Astronomer

By S. A. Mitchell

Stealing Bases in Baseball as a Psychologist Sees It

By Arthur Macdonald


  • Departments

    Correspondence - July 10, 1915

  • Recently Patented Inventions - July 10, 1915

  • New Books, Etc. - July 10, 1915

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