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A Four-Mile Deposit of Iron Ore

The Problem of the Telephone

Vienna International Electric Exhibition

The Past Year in the Patent Office

The Star of Bethlehem

What is an Artist?

Electric Motors with Inductors Containing no Iron

An Ammonia Still for Small Gas Works

Improved Sponge Filters

Terra Cotta Lumber

Flexible Self-Gauging Faucet

The New Otto One-Horse Power Silent Gas Engine

A Glass Globe from which Three Hundred Watch Crystals were Cut

The Automaton Chess Player

Miscellaneous Inventions

Engineering Inventions

Agricultural Inventions

Mechanical Inventions


  • Departments


  • Recent Inventions

  • Business and Personal

  • Notes and Queries

  • Index of Inventions

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