Features
Puddling Iron by Machinery
Application of the Spectral Analysis to Astronomical Phenomena
How American Locomotives are Made
Foreign Summary
Market for the Month
Harper's Gas Lighter
Apprentices and Journeymen
Increase of Wealth
Renewal of the Winooski and Algon Quin Trial
Why Rents Are So High
Grave Charges against the American Institute
Recent American Patents
Patent Claims
Issued from the U. S. Patent Office
Patent Agency Office
Departments
- Departments
Correspondence