Features
An Apparatus for Making Observations from Aeroplanes
By the Paris Correspondent of the Scientific American
An Automatic Gasoline Engine Cream Separator
A Mechanical Bill Counter for the United States Treasury
An American Small-arms Plant in Australia
A Triumph for American Machine Tools
The Parcels Post Zone System
The New Maps and How They are Used, To Our Subscribers and more
Catapulting a Hydro-aeroplane from a Fighting Ship
Adapting the Flying Machine to the Requirements of the Navy
Working a Whistler
A Dangerous Task That Requires Skill
Wireless Telegraphy Without Sparks
A Rule to Find the Day of the Week upon Which Any Given Date in the Christian Era Fell
Departments
- Letters
Correspondence - December 14, 1912
- Departments
Inventions New and Interesting - December 14, 1912
Recently Patented Inventions - December 14, 1912
