Features
Improved Atmospheric Hammer
White Lead in Philadelphia
Abortion in Cows From Ergot
Coal Oil--Secret Inventions
Improved Steam Riveting-Machine
Machines for Sweeping Streets
Notes on the Great St.Louis Fair
Notes on Foreign Inventions
“The Hammer.”--Gross Plagiarism
Extracting Silver From its Ores
Pennsylvania Rock Oil
Influence of Different Kinds of Manure on Herbage
A Column of Interesting Varieties
Maillefert's Aerostatic Tubular Diving-Bell
Travis' Steam Governor
Improved Cap and Lantern
Editorial Correspondence
Reform of the Patent Laws
A Beetle in a Traveler's Ear
Patent Cases
Mare's Nests in Porkopolis
Foreign Summary--News and Markets
Weekly Summary of Inventions
Patent Claims
Machine for Sawing Out Barrel Heads
Opening of the Cooper Institute
The Great Balloon
Departments
- Departments
Notes and Queries
