Features
The Sources of Our Modern Knowledge
The Broadway Underground Railway
The Fire on Board the Steamer Alaska
Estimating Power by Size and Speed of Belts
Zirconium
Patent Medicines
The Hydraulic Ram
A Novel Mode of Marine Propulsion
Novel Rat Trap
The Wonders of the Egg
The Configuration and Dimensions of Blast Furnaces
American Locomotives--The Baldwin Works
Cart Loader
Combination Padlock
Culinary Boiler
Central Park, New York City
Recent American and Foreign Patents
Answers to Correspondents
Best Mode of Introducing New Inventions
Communications Received
Departments
- Departments
Correspondence
New Books and Publications
Notes and Queries
Business and Personal
Index of Inventions
