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Magazine Breech Loading Gun, New Light for the Use of Photographers, and more

Chrysalids and Cocoons

By E. C. H. Day

The New School of Mechanical Engineering at Hoboken, N. J

The Westfield Explosion--How Boilers Ought to be Inspected--Interesting Testimony by a Wide Awake Man

Adjustable Tension Razor Strop

Improved Method of Drawing Patterns for Flaring Vessels of Sheet Metal

Rating Steam Boilers

The Westfield Explosion. The Verdict—Warrants for the Arrest of the President, Superintendent, and Engineer Who are the Real Culprits?

Objections to Darwinism

State Interference with Patents

A New Water Meter

Scientific Intelligence- August 26, 1871

Improvements in Marbleizing Paper and Oil Cloth

Patent Office Decisions- August 26, 1871

Invalidity of State Laws Regulating the Sale of Patents

Answers to Correspondents- August 26, 1871

Queries- August 26, 1871

Recent American and Foreign Patents- August 26, 1871

Official List of Patents- August 26, 1871

Issued by the U. S. Patent Office

Applications for Extension of Patents- August 26, 1871


  • Letters

    Correspondence- August 26, 1871

  • Recommended

    New Books and Publications- August 26, 1871

  • Departments

    Business and Personal- August 26, 1871

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