Features
On a “Piece of Chalk”.--A Lecture to Workingmen
The Best Modes of Testing the Power and Economy of Steam Engines
Testing the Power of Steam Engines
Hancock's Screw Propeller
The Natural and the Artificial
Editorial Summary
Speed of Railway Trains
Manufacturing, Mining, and Railroad Items
Recent American and Foreign Patents
New Publication
Answers to Correspondents
“Gold! Gold! Hard to Get and Heavy to Hold.”
Self Education
European Patents
Expansion of Ice
Caveats
Comparison and Relation the Only Criterion of Size
On a Probable Connection Between the Resistance of Ships and Their Mean Depth of Immersion
New Mexico, Its Natural Wealth
Transportation of Cattle--Reid's Patent Cattle Wagons
Patents and Claims
Issued by the United States Patent Office
Departments
- Departments
Correspondence
Business and Personal
