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Mastering the Alaskan Glacier Barriers

By Lawrence Martin

Fire and Burglar-Proof Safes—II

Recent Advances in their Construction

By E. E. Watson

The Cultivation of Cotton in Egypt

The Progressive Disclosure of the Entire Atmosphere of the Sun

By H. Deslandres

More Aeroplanes at Olympia

With Special Reference to the Dunne Monoplane

Rules Governing the Competition for the $15,000 Flying Machine Prize Offered by Mr. Edwin Gould

A New Life Saving Buoy

The Miller Luminous Buoy

Diesel Marine Engines

A Resume of Recent Performances

By Herr Th. Saeuberlich

The Two-point System Ignition

Merits of the Scheme Outlined

Some Unsolved Problems in Electro-Plating

By George B. Hogaboom

Something about Writing Inks

Notes on Fluidity, Durability, Corrosion and Copying


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