Features
Magnitude of Work on New State Barge Canal
City Terminals Without Traffic Connection
Wire-Wound Versus Steel Guns
Science
Aeronautics
Electricity
Some Experiments with an Orange
Some New Warships and Their Equipment
Opening of the Down-Town Hudson Tunnels
The Third Honorable Mention Essay in the Fourth Dimension Competition
The Scientific Work of the Late Prof. Simon Newcomb
The Disinfection of School Books
An American Farmobile
The Flight of the Curtiss Aeroplane for the Scientific American Trophy
Panning Without Water
Patent Department - July 24, 1909
Portable Winch
Automatic Drain for Compressors
Paper Hanger's Trimmer
Expanding Brush for Cleansing Bottles
Apparatus for Purifying Water by the Injection of Ozone
Lock for Electric Meters
Departments
- Departments
New Books, Etc. - July 24, 1909
Index of Inventions - July 24, 1909
Recently Patented Inventions - July 24, 1909
