Features
Hot Air Engine for Egypt
Dake's Improved Sugar Mill
Depressions of the Earth
Invention of the Microscope
Elmer's Machine for Gumming Saws
Patent Claims
A Pleasant Testimonial
A New Gnomon
Inter-Oceanic Canal to the Pacific
Dialing
Uses of the Potato
Cotton Mills in Saxony
Successful Copper Mining in Australia
Recent Patented Improvements
La France's Improved Throttle Valve
Improved Coal-Burning Locomotive
Machinery Wanted
Wonders of Photography
Extension of Patents by the Commissioner and by Congress
The Agricultural Division of the Patent Office
Groodyear's India Rubber Extension Case
A Good Chance for Inventors
The Duration of Man's Life—A New Idea
What shall we do About Prizes?
Saleratus and Cream of Tartar in Bread
Sulphurous Acid
Burning of the Dead
The Loss of the Ava
Habits of Grasshoppers
Mechanics
Drawing Iron
The British Post Office
Douslass' Railroad Car Spring
Natcher's Millstone Dress
Departments
- Letters
Correspondents - June 19, 1858
- Recommended
Literary Notices - June 19, 1858
