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Features

Schopp's Push Chair or Ice Velocipede

Young's Improved Hot Air Register

Machine for Turning the Ends of Axletrees

Manufacture of Varnish in England

The Application of Steam to Canals--No. 2

By George Edward Harding

Mechanical Tests

Tools for Cutting Metals

The Illinois and St. Louis Bridge

Wood-Boring Beetles

By E. C. H. Day

Improvement in Extracting Spirits of Turpentine from Pine Wood

Repairing Roads

The Proposed Centennial Exhibition in Philadelphia, in 1876

Guess Work and Real Work

The Electric Light

Scientific Intelligence- June 17, 1871

A Great Speech

Klinkerfues' Apparatus for Igniting Gas and Other Lights

Answer to Correspondence- June 17, 1871

Queries- June 17, 1871

Official List of Patents- June 17, 1871

Issued by the U. S. Patent Office

Applications for Extension of Patents- June 17, 1871

Recent American and Foreign Patents- June 17, 1871

Departments

  • Letters

    Correspondence- June 17, 1871

  • Recommended

    Business and Personal- June 17, 1871

  • New Books and Publications- June 17, 1871

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June 17, 1871

Complex Causes. Alternative Solutions.