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Training Women to Be Car Conductors, Natural Explosion Phenomena and more

Trench Warfare

Ten Hours of Trench Digging for Ten Minutes of Rifle Fire

By W. D. A. Anderson

Cipher Codes and Their Uses

By E. C. Edwards

Science in German Concentration Camps

Necessary, Not Only for Humanitarian Reasons, But for Self-Pre-servation

By Alfred Gradenwitz

The Verdict of the Insects

By Davina Waterson

Austria's Famous "Skoda" Mortars

The powerful weapon which assisted in the reduction of Liege, Namur, Maubeuge, Civet, Antwerp and Przemysl. It requires a crew of 200 men. Its range is so great that an enemy would have to march two hours to capture it--sufficient time for its dismemberment and removal...

Bath Trains of the Russian Army

Each Train Can Daily Give a Bath to at Least 3.000 Soldiers. It Provides' for the Serving of Refreshments and Affords Numerous Utility Advantages

The Fight Between the "Constitution" and the "Guerriere"

Naval Warfare as Carried on One Hundred Years Ago

The Modern Submarine

Methods of Control of the Latest and Most Dreaded Type of Warship

The How and Why of the V-Type Motor

Efforts to Produce a Steady Stream of Power by the Use of Eight and Twelve Cylinders

By John S. Harwhite

How Rifle Bullets Fly

French and Swiss Bullets of Stream-Line Shape to Reduce Air Resistance

By Edward C. Crossman

The German Post Office and the German Army

The Working Scheme of the Field Post Had Long Been Prepared in Time of Peace

By Alfred Gradenwitz

The Machinery of Modern Submarines

Various Motor Types

By A. P. Chalkley

The Strategic Moves of the War

Our Military Expert--June 23rd, 1915

A Combined Bolt and Lock-nut, Sculptor's Pneumatic Chisel and more

Superheated Steam in Torpedo-Boat Engines

By Warren H. Miller


  • Departments

    Correspondence - July 3, 1915

  • Recently Patented Inventions - July 3, 1915

  • Notes and Queries - July 3, 1915

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