Improved Patent Mowing Machine

The Fair of the American Institute

British Association for the Advancement of Science--Address

Miscellaneous Summary

A Novel Steam Engine

A Way to Show Water Running Up a Hill

The Teeth--Dental Caries

Effusion of Gases--Atmolysis

How English Cutlery is Made

A Noticeable Feature of the Fair

Patent Office Report for 1861

American Copper

Keying Wheels on Shafts

Harbor Defense

Recent American Patents

To Our Readers

Patent Claims

Issued from the United States Patent-Office