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Features

Improved Steam Trap

Writing Fluids

Double Turbine Water Wheel

Adjustable Plow

The Carpenter Bee

Simple Apparatus for Out-Door Sketching

Paper Boats—How Made

Improved Shops

Scientific and Practical Information - September 14, 1872

Railway Rail Joint

Albany Steam Trap

The Star Sirius

Terrestrial Magnetism - September 14, 1872

Substances Acting Mechanically to Prevent the formation of Scale in Boilers

An Astronomical Robbery

The Newark Industrial Exposition

Renewed Activity at the Patent Officer—Re Organization and New Classification—Appointment and Promotions

Letter from Professor R. H. Thurston - September 14, 1872

Recent American and Foreign Patents - September 14, 1872

Foreign Patents—A Hint to Patentees

New Patent Law in Canada - September 14, 1872

Departments

  • From the Editor

    Answers to Correspondents - September 14, 1872

  • Letters

    Correspondence - September 14, 1872

  • Recommended

    New Books and Publications - September 14, 1872

  • Departments

    Business and Personal - September 14, 1872

  • Notes and Queries - September 14, 1872

  • Index of Inventions - September 14, 1872

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September 14, 1872

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