Scientific American Magazine
Volume 23, Issue 5You are currently logged out. Please sign in to download the issue PDF.
Features
Improved Engraving Machine
Richard Trevithick Inventor of the Locomotive
Of Thought without Language
Scientific Intelligence- July 30, 1870
The Hymenopters
Experiments with Hydrate of Chloral
A New Dodge in Hair Dyes
Duckham's Hydrostatic Weighing Machine
Alexander's Safety-Cap for Molasses, Varnish, and Oil Cans
Floato-Static Breakwater
Can Mineral Matter be Assimilated in the Animal Economy?
A New Bleaching Agent
New Mechanical Movements- July 30, 1870
Bessemer Steel--American Improvements
Liebig's Extract of Meat
Progress of Invention Abroad- July 30, 1870
Our Correspondence- July 30, 1870
Public Parks and Floral Decorations
How Inventors are Appreciated in Congress
Action of Sea Water on the Metallic Fastenings of Ships
Answers to Correspondents- July 30, 1870
Applications for the Extension of Patents- July 30, 1870
Recent American and Foreign Patents- July 30, 1870
Rogers' Patent Price Current Books
Official List of Patents- July 30, 1870
Departments
Correspondence- July 30, 1870
Business and Personal- July 30, 1870
