Features
Suspension Truss Bridge, Powdered Coal for Unhealthy Plants and more
Alloys for Bells, Gongs, Cymbals, Etc.
Heat and Light - June 8, 1872
Improved Puddling Tool
Riveting Device
Mill Step
Discharging Coal
Steam Propulsion on Canals
Peart's Patent Pit Car Wheel
Strengthening Emery Wheels
Information on Gum Copal
The United States Senate on Compensation to Inventors
Eight Hours' Work and Ten Hours' Pay
The Sewing Machine Ring in a New Role
Screw Elevators
Recent American and Foreign Patents - June 8, 1872
Departments
- From the Editor
Answers to Correspondents - June 8, 1872
- Recommended
New Books and Publications - June 8, 1872
- Departments
Notes and Queries - June 8, 1872
Business and Personal - June 8, 1872
