Features
The Migration of the Great American Desert
The Mining Debris Problem in California
American Industries, No. 40
Oleomargarine--How it is Made.
Miscellaneous Inventions
New Car Coupling
Automatic Hub Mortising Machine
New Oatmeal Machine
A New Writing Instrument
New Steak-Tendering Mallet
Mechanical Inventions
Boiler Plate Testing Machine
The Elephant Calf and its Mother
Improvement in Potato Diggers
Departments
- Departments
Recent Inventions
Business and Personal
Index of Inventions
Notes and Queries
Patents
