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A Costly Lack of Co-ordination, Wind Pressure on Ocean Liners and more

Pedagogical Laboratories

How Children are Studied in a Russian Laboratory from Their Birth Until Their Twenty-first Year

By P. R. Radosavljevich,

Dissecting a Military Dirigible Airship

An Interesting Experiment With the New "Vl"

By Alfred Gradenwitz

Gas Engine Yacht, A Motorcycle Milkman and more

By Robert MacIntyre

How Insects Fight

Stings, Mandibles, Horns and Poisons in Warfare

By Percy Collins

The Fire Convention at New York


  • Letters

    Correspondence - August 30, 1913

  • Departments

    The Motor-Driven Commercial Vehicle

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