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Krupp's New Cannon for the Paris Exhibition

The Paris Exposition

Improved Adjustable Mitering Apparatus

Lubricating Petroleum as a Siccative Oil

Progress of the Commission of Life-Saving Inventions


Butterworth's Improved Window Spring

Uprights on a Plane and on a Curve

Powell's Sleeve Supporter

Hub-Boring Machine

Answers to Correspondents

Recent American and Foreign Patents

New Publications


The Public Railway System

The Broadway Bridge

Off to Europe

Naphthalizing Gas

Lightning Conductors

Great Inventors--Their Suffering and Success

Patent Claims

Issued from the U. S. Patent Office

The Pacific Railroad--Its Several Grand Divisions

Science Familiarly Illustrated

How to Obtain Patents


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May 18, 1867

The Antidote to Anti-Intellectualism