The Burnside Rifle, Licensing Engineers

Launch of the Iron Battery “Keokuk”

Cheap Oxygen Gas--Light and Heat

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

Sir David Brewster on the Patent Laws

“Argyllite”--A New Mineral

Hadley's Patent Tap Guide

National Workshops

Now is the Time to Form Clubs

Relief for English Operatives

A Few Words to Our Subscribers on the Closing Volume

The Manufacture of Printing Paper

Bring on the Paper Stock!

Order in the Engine-Room

New Experiments with Guns and Targets

Recent Foreign Inventions

The Drain of Labor

Patent Claims

Issued From The United States Patent Office

Recent American Inventions

To Our Readers

An Effective Rat Trap