Features
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
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
The Latest Development in British Railway Locomotive Design
A Machine that Saws 240,000 Wooden Paving Blocks in a Day
Is the Axis of the Earth Shifting?
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
- Departments
Correspondence
Recently Patented Inventions
Notes and Queries
Index of Inventions
New Books, Etc.
Patents
