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Features

Improved Portable Engine for Agricultural Use

Meteors

McNeil's Improved Tobacco Pipe

Obituary--Zerah Colburn, Engineer, and Leading Writer of Engineering Papers

Mechanical Recreations - May 14, 1870

The Dangers of Drugs

The American Museum of Natural History

Steam Boiler Inspection

Chemistry of Zirconium

Scientific Intelligence- May 14, 1870

Curious Associations among Animals

Applications for Extension of Patents- May 14, 1870

United States District Court--Southren District before Judge Blatchford Patent for Making Veneers

Recent American and Foreign Patents- May 14, 1870

Answers to Correspondents- May 14, 1870

Official List of Patents- May 14, 1870

Departments

  • Letters

    Correspondence- May 14, 1870

  • Departments

    Business and Personal- May 14, 1870

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May 14, 1870