Skip to main content


Railroad Suspension Chair, Disappearance of a Nebula

Notes on Military and Naval Affairs

Polytechnic Association of the American Institute

Kepner's Feathering Paddle Wheels

The Great Troy Fire--Iron Safes Destroyed

The Best Gun

Proposed Amendments to the Canada Patent Law System

General Totten on the Ship and Fort Question

Extension of Patents--For Whose Benefit They Are Granted

The Way the Gold Deposits of California Were Formed

Patent Law Reform in New Brunswick

Recent American Inventions

Patent Claims

To Our Readers


  • Departments


  • Notes and Queries

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
May 31, 1862

Confronting Common Wisdom