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Machine for Bending Printers' Leads and Rules

Machine for Testing the Strength of Metals, Wire, Rope, Chain, Cast Iron Columns, Bridge Bolts, and Boiler Plates, Junction of the Black and Caspian Seas and more

State Reports

Gunmaking by Machinery

Terra Cotta

Moustache Guard

Johnson's Renewable Tooth Comb

The Planet Jupiter

The Quantitative Determination of Arsenic

By John C. Draper

Wright's Bottle Stopper

Geological Report for New Jersey

Scientific and Practical Information

Melendy's Door Fastener

Beach's Spiral Spring Scroll Sawing Machine

Making Organic Substances from their Inorganic Elements

The Relations of Art to Industry and Museums of the Arts of Design

Mechanical Impossibilities - March 30, 1872

Hydrogen the Vapor of the Metal Hydrium

Another Big Patent Job before Congress

Recent American and Foreign Patents - March 30, 1872


  • From the Editor

    Answer to Correspondents - March 30, 1872

  • Letters

    Correspondence - March 30, 1872

  • Recommended

    New Books and Publications - March 30, 1872

  • Departments

    Business and Personal - March 30, 1872

  • Notes and Queries - March 30, 1872

  • Index of Inventions - March 30, 1872

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