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Safety of the Brooklyn Bridge

Double-Deck Subway Express Stations

Healthy Conditions at Panama in 1907

Heroic Measures in Hudson Tunnel Construction

Safety Devices on Railroads

Second Exhibition of Safety Devices

Facts about the Use of the Air Brake

By L. F. Wilson

New York's Automobile Carnival and Hill Climb

The Aviation Section of the Aero Club of America

The Current Supplement

Weather Vane with Attachment for Indoor Readings

By William H. Place

The Latest Development in British Railway Locomotive Design

By F. C. Coleman

A Machine that Saws 240,000 Wooden Paving Blocks in a Day

By Jacques Boyer

Is the Axis of the Earth Shifting?

By J. F. Springer

The United States Battleships "Delaware" and "North Dakota"

Successful Test of the Cornu Helicopter

Puck's Conception of the Scientific American

Pneumatic Valve Mechanism for Piano Players

Thill Coupling

Tobacco Hanger

Revolving Flash Lamp

Patent Department

A Machine for Vending Postage Stamps

Frying Pan with Folding Handle

A New Type of Automobile Horn


  • Departments


  • Recently Patented Inventions

  • Notes and Queries

  • Index of Inventions

  • New Books, Etc.

  • Patents

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