Volume 7, Issue 25
You are currently logged out. Please sign in to download the issue PDF.
Features
Cheap Oxygen Gas--Light and Heat
Launch of the Iron Battery “Keokuk”
Valuable Receipts
Seventeen Thousand Patents Secured Through Our Agency
An Address on the Patent Laws
Rapid Dry Collodion Photography
The Grape Cure
Steam Plowing in England
“Argyllite”--A New Mineral
Sir David Brewster on the Patent Laws
Hadley's Patent Tap Guide
Relief for English Operatives
The Manufacture of Printing Paper
A Few Words to Our Subscribers on the Closing Volume
Now is the Time to Form Clubs
National Workshops
Order in the Engine-Room
Bring on the Paper Stock!
Recent Foreign Inventions
The Drain of Labor
New Experiments with Guns and Targets
Recent American Inventions
Patent Claims
Issued From The United States Patent Office