Skip to main content


Improved Toggle-Joint Press, Steel Rifle Barrels, and more

Notes on Military and Naval Affairs

Shepherd's Patented Well Curb

Polytechnic Association of the American Institute

The Colors of Coal Tar

The Discoveries of 1861

The Excitement in Relation to Iron-Plated Ships

Secrets of the Bessemer Process

The Last Phase of the Armstrong Gun

The British Iron-Clad Navy

Extension of Patents--For Whose Benefit they are Granted

Recent Foreign Inventions and Discoveries

Piedmont Gold Mining and Amalgamating System

The Great Exhibition

Recent American Inventions

Patent Claims

Issued from the United States Patent Office

To Our Readers


  • Departments


  • Notes and Queries

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
May 10, 1862

Science for the Modern World