Features
Arago's Plan for Proving the True Theory of Light
The Use of Ammonia as a Manure
Recent American Patents
Patent-Office Decisions
The Foot Lathe
Powell's Globe Valve
The Way the Money Market is Supplied
A Novel Store
Exhibitors at the French Fair
Petroleum as Fuel
Prosperity and Adversity of Insurance Companies
Reciprocity with the Canadas
The Cholera Coming
Patent Claims
Jelliffe's Blacking Box Holder
Departments
- Departments
Correspondence
Notes and Queries
