Features
New Double Spindle Drill
The Preparation of Gelatin
The Spectroscope Simplified
Thick Cylinders
Pneumatic Foundations
The Digestive Apparatus
Freight Business of New York City Across the North River
Scientific and Practical Information
The American Institute Fair
The Chicago Inter-State Industrial Exposition
Silkworms
Improved Plow
Iron Ship Construction
A New Preventive for Slipping Belts
Lock Envelope
Tanite Emery Grinder with Adjustable Table
Improved Spindle Step
Car and Passenger Elevator
Sanitary Notes--Milk and its Adulterations
Recent American and Foreign Patents
Answers Correspondents
Communications Received
Departments
- Departments
Correspondence
Business and Personal
Notes and Queries
Index of Inventions
