Improved Paging Machine

Notes on Military and Naval Affairs

The Geological History of North America

Meriton's Safety Brake for Steering Gear

Chemistry of Iron

Novel Knife Sharpener

Coburn's Patent Sash Fastener

Muntz Sheathing for Iron Ships

Which is the Best Washing Machine

Sand, Soap and Glass

Building Stones and Their Preservation

M'Cormick's Extension Again--Personal

Our Navy and its Gallant Commodore Dupont

Fifteen Thousand Patents Secured Through Our Agency

Subjects for Invention

Trial Trip of the Steamer “Constitution”

Notes on Foreign Inventions

Index of War and Naval Inventions

To Our Editorial Brethren

Patent Claims

Issued from the United States Patent Office

Recent American Inventions