Features
Progress of Aluminum
Big Guns for Coast Defense
A Mountain Railway Near New York City
A Refrigerator Vehicle for Perishable Articles
An Automatic Steam Boiler Feeder
A Brake for Street Cars
An Improved Elevator Gate
A Cork-Drawing Device
An Improved Wrench
A Marker for Wood-Workers
The Defense of New York
Cure of Consumption--An Interview with Professor Koch
Safe Construction of Buildings
Electric Chimes
Departments
- Letters
Correspondence- December 6, 1890
- Recommended
New Books and Publications- December 6, 1890
- Departments
Business and Personal- December 6, 1890
Notes & Queries- December 6, 1890
Recently Patented Inventions- December 6, 1890
To Inventors- December 6, 1890
Index of Inventions- December 6, 1890