Features
Richard Trevithick Inventor of the Locomotive
Of Thought without Language
Scientific Intelligence- July 30, 1870
The Hymenopters
A New Dodge in Hair Dyes
Experiments with Hydrate of Chloral
Alexander's Safety-Cap for Molasses, Varnish, and Oil Cans
Duckham's Hydrostatic Weighing Machine
Floato-Static Breakwater
Can Mineral Matter be Assimilated in the Animal Economy?
New Mechanical Movements- July 30, 1870
A New Bleaching Agent
Bessemer Steel--American Improvements
Our Correspondence- July 30, 1870
Progress of Invention Abroad- July 30, 1870
Liebig's Extract of Meat
How Inventors are Appreciated in Congress
Action of Sea Water on the Metallic Fastenings of Ships
Public Parks and Floral Decorations
Answers to Correspondents- July 30, 1870
Recent American and Foreign Patents- July 30, 1870
Applications for the Extension of Patents- July 30, 1870
Rogers' Patent Price Current Books
Official List of Patents- July 30, 1870
Departments
- Letters
Correspondence- July 30, 1870
- Departments
Business and Personal- July 30, 1870
