Volume 90, Issue 13
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Features
Future Extension of the Subway System
A Floral Map of the United States at the St. Louis Exposition
Borings on a Coral Reef
The United States in 1903
Concrete Piling
A New Gasoline Motor for Airships
A Single-Cylinder, Reversible, Four-Cycle Gasoline Engine
A New System of Rapid Telegraphy
The New Vickers-Maxim 9.2-Inch Wire-Wound Gun
The Abruzzi Polar Expedition.—I
The Hudson River Tunnel
Combination Lock for Umbrellas
Patent Department
Harrow Tooth and Simple Fastening Device
Valve Mechanism for Locomotives
Bending Device
Mail Box for Rural Free Delivery Routes
Ore-Sampling Machine
Improved Windmill
Business and Personal Wants - March 26, 1904
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