Features
Camphor
Specific Heat
Crude Petroleum for Fuel and for Illuminating Gas
The Fair of the American Institute
Rescue of the Remaining Survivors of the Polaris
A Simple Tree Protector
The Planet Mars--Is it Inhabited?
Calfskin Tanning in Europe
Self-Tightening Drill Chuck
The Great Exposition--Letter from United States Commissioner Professor R. H. Thurston
Improved Plow Attachment
The Danbury Drill Chuck
Automatic Railroad Gate and Signal
Recent American and Foreign Patents - October 4, 1873
Answer to Correspondents - October 4, 1873
Communications Received - October 4, 1873
Departments
- Letters
Correspondence - October 4, 1873
- Recommended
New Books and Publications - October 4, 1873
- Departments
Notes and Queries - October 4, 1873
Business and Personal - October 4, 1873
Index of Inventions - October 4, 1873
