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Features

Hand Grenades, Strategic Positions of the Contending Armies and more

By Edward C. Crossman

A Mother Ship for Submarines

A Combined Salvage and Drydock Vessel

By Robert G. Skerrett

Plan for the Improvement of Hell Gate, East River, A Black Finish for Iron and more

By C. D. Ward

Science and the Forger

Instruments and Illustrations in Questioned Document Cases

By Albert S. Osborn

Milling the Soil

Improving on the Old-Fashioned Plow

By L. W. Ellis

A System of Long Distance Typewriting

Eight Messages Sent Simultaneously Over a Single Wire

The Psychology of Batting in Baseball, Good Roads Legislation

By Arthur Macdonald

Departments

  • Departments

    Correspondence - May 8, 1915

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May 08, 1915Cover Image: The New Laurenti Submarine Salvage Boat and Testing Dock

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