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Features

Union Arch, Washington Aqueduct

Separation of the Comet

Fulminating Compounds

The Manufacture of Celluloid

Poisonous Refreshments

Steam Boiler Notes

Centripetal and Centrifugal Motions in Animals

New Mechanical Movement

Mechanical Inventions

Improved Spring Hinge

New Glove Fastener

Agricultural Inventions

New Tire Tightener

Collapse of a Steel Boiler Flue

By S. N. Hartwell

Phosphorescent Substances

Electro-Massage

New Reflector for Suspended Lamp

Miscellaneous Inventions

Improvement in Buttons

Dynamic Electricity

By M. Hopkins

Volumetric Assay of Bullion, Alloys, Etc.

Engineering Inventions - July 23, 1881

Departments

  • Departments

    Recent Inventions

  • New Inventions - July 23, 1881

  • Index of Inventions - July 23, 1881

  • Business and Personal - July 23, 1881

  • New Books and Publications - July 23, 1881

  • Notes and Queries - July 23, 1881

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