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Features

Hilgard's Design for a Steel Arch Bridge at Minneapolis

Twine

Photographic Notes

Car Coupling

Soldering Case

Seal Lock

Metallic Spring for Suspenders

Improved Pail Ear

Floods in India

Tunneling by Freezing

Polarized Light

Practical Applications of the Polariscope

By M. Hopkins

The Quadrumana

By L. P. Gratacap

The Water Tower at Victoria, Texas

Torricelli's Principle and Mercury Fountain

By T O'conor Sloane

Agricultural Inventions - October 23, 1886

Miscellaneous Inventions - October 23, 1886

Mechanical Invention - October 23, 1886

Engineering Inventions - October 23, 1886

To Inventors - October 23, 1886

Departments

  • Letters

    Correspondence - October 23, 1886

  • Departments

    Business and Personal - October 23, 1886

  • Index of Inventions - October 23, 1886

  • Notes and Queries - October 23, 1886

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October 23, 1886

Think Outside the Gift Box