Features
Six Hundred and Fifty Miles by Telephone
Sanitary Precautions After Floods
Early Steam Engines and Boilers
The Leffel Turbine
Improved Railway Elevator
Improved Fence Post
New Feed Water Heater and Lime Extractor
Abacus Attachment for School Slates
Improved Vertical Engine
Improved Railroad Crane
Mechanical Inventions
Miscellaneous Inventions
Agricultural Inventions
Departments
- Departments
Correspondence
Recent Inventions
Notes and Queries
Business and Personal
Index of Inventions
