Features
Young's Improved Hot Air Register
Machine for Turning the Ends of Axletrees
Manufacture of Varnish in England
The Application of Steam to Canals--No. 2
Mechanical Tests
Tools for Cutting Metals
The Illinois and St. Louis Bridge
Wood-Boring Beetles
Improvement in Extracting Spirits of Turpentine from Pine Wood
Repairing Roads
The Proposed Centennial Exhibition in Philadelphia, in 1876
Guess Work and Real Work
The Electric Light
Scientific Intelligence- June 17, 1871
A Great Speech
Klinkerfues' Apparatus for Igniting Gas and Other Lights
Answer to Correspondence- June 17, 1871
Queries- June 17, 1871
Official List of Patents- June 17, 1871
Issued by the U. S. Patent Office
Applications for Extension of Patents- June 17, 1871
Recent American and Foreign Patents- June 17, 1871
Departments
- Letters
Correspondence- June 17, 1871
- Recommended
Business and Personal- June 17, 1871
New Books and Publications- June 17, 1871