Features
Postal Science
The Progress of the Hell Gate Excavations
A Recent Improvement in Gas Making
On the Molecular Changes Produced by Variations of Temperature
The Panic and the Laboring Classes
Scientific and Practical Information - November 15, 1873
Medical Science in Court - November 15, 1873
The Government Boiler Tests
American Lighthouses
A New Improvement in Gas Manufacture
American Academy of Sciences
Improved Frost Log Dog
Combination Corn Sheller Boot jack Etc.
Lightning Sheep Shears
The Great Bridge at St Louis
Recent American and Foreign Patents - November 15, 1873
Answers to Correspondents - November 15, 1873
Communications Received - November 15, 1873
Departments
- Letters
Correspondence - November 15, 1873
- Departments
Business and Personal - November 15, 1873
Notes and Queries - November 15, 1873
Index of Inventions - November 15, 1873
