Features
An Improvement in Locks and Keys
A Convenient Sponge for Cleaning Slates
An Artificial Lake and Water Slide
An Improved Slide Valve for Engines
A Coal Elevator for Railway Service
An Improved Knife Sharpener and Polisher
The Meeting of the Great Shields of the St. Clair River Railway Tunnel
Photographic Notes- September 13, 1890
Work of Amateur Electricians
New Form of Towing Steamers
A Swinging Hydraulic Capstan
The Kola Nut
Killing Large Sunfish with Firearms
Engine Pounding--Ways of Stopping It
The Scientific Use of Common Things
Departments
- Letters
Correspondence- September 13, 1890
- Departments
Notes and Queries- September 13, 1890
Index of Inventions- September 13, 1890
Business and Personal- September 13, 1890
To Inventors- September 13, 1890
Recently Patented Inventions- September 13, 1890