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Improved Method of Operating Valves

Seasonable Information

Patent Claims - July 17, 1858

Issued from the United States Patent Office

Recent Patented Improvements - July 17, 1858

The Maryland Institute

The Patent Office Bureau

New Patent Hydrant

Important to Patent Agents and Lawyers

Ingenuity Wrongly Applied

Smallpox and the Poor

Deferred Articles

Our Board of Health Again

The Geology of North America

Goodyear's Patent Extension

Commissioner Holt's Decision

To Our Subscribers

Improved Grain Cleaner

How to Dye Green with Picric Acid


Treatment of Copper Ores

Sniff's Sausage Machine


  • Letters

    Correspondents - July 17, 1858

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Why Do Facts Fail?

Why Do Facts Fail?

Deconstructing Denial