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Features

Propulsion of the Secor Yacht Eureka by the Explosion of Petroleum Vapor

Torpedo Boats in the Gale

The Basic Steel Process

Efficiency of Small Water Motors

Improved Windmill

Railway Track

Improved Desk Attachment

Wire Painting Machine

Improved Whiffletree

Making Fine Guns for Sporting Purposes

Anti-Friction Bearing

Banjo Frame

Photographic Notes - July 24, 1886

Pinhole camera.

The Petroleum Oil wells of Baku

Polarized light

Apparatus for exhibiting wide angled crystals

By Geo. M. Hopkins

Decisions Relating to Patents

Volcanic Eruptions in New Zealand

Wedge Paradox and Falling and Projected Ball

By T. O'Conor Sloane

To Inventors - July 24, 1886

Agricultural Inventions - July 24, 1886

Engineering Inventions - July 24, 1886

Miscellaneous Inventions - July 24, 1886

Departments

  • Letters

    Correspondence - July 24, 1886

  • Departments

    Index of Inventions - July 24, 1886

  • Notes and Queries - July 24, 1886

  • Business and Personal - July 24, 1886

  • Patents

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July 24, 1886

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