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Editorial Correspondence

The Nashville Suspension Bridge

Science Familiarly Illustrated

Turning a Movable Wheel Around a Fixed Wheel

Manufacturing Mining and Railroad Items

Recent American and Foreign Patents

Answers to Correspondents

Bruce's American Foot Stove

Making Chains Without Welding

Harlan's Patent Animal Trap

Badly Planned Buildings

The Commissioner of Patents

Phosphorus--Its Characteristics

Consumption and Nature of Material Used in the Manufacture of Matches

Hardening and Tempering Steel--The Value of Baths

Patent Bills before Congress

Patents and Claims

Issued by the United States Patent Office


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February 29, 1868

20% Sitewide for President's Day