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Features

Drop Forging of Tool Steel

An Accident on the Great Bridge

Aspects of the Planets for June

A Novel Air Motor

Improved Water Heater

Atmospheric Dust and Germs

Fire and Burglar Proof Safes

Electric Lighting on the Arizona

The Helmet Cassowary

Agricultural Inventions

Miscellaneous Inventions

Mechanical Inventions

Engineering Inventions

Departments

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    Correspondence

  • Recent Inventions

  • Business and Personal

  • Notes and Queries

  • New Books and Publications

  • Index of Inventions

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June 09, 1883

Think Outside the Gift Box