Features
Visit to a Steel Manufactory
An Interesting Review of the American Patent System
Products of the Pine Forest
Woods' Saw-Gumming and Sharpening Machine
Snyder's Improved Turbine Wheel
Proposed Sale of the Yosemite Valley
The Use of Salt in Agriculture
Co-Operation among Inventors
Something about Gases
New Mechanical Movements
Congress Extending Patents
Proposed Plan for Publishing Patent Office Specifications and Drawings
Applications for Extension of Patents- March 19, 1870
Recent American and Foreign Patents- March 19, 1870
Official List of Patents- March 19, 1870
Progress of American Invention in Europe- March 19, 1870
Rotating and Fixed Turrets
Departments
- Letters
Correspondence- March 19, 1870
Answers to Correspondents- March 19, 1870
- Recommended
New Books and Publications- March 19, 1870
- Departments
Business and Personal- March 19, 1870