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Proposed New System of Waterworks for Chicago

A Glance Backward and Forward

Patents as Investments

Naval and Coast Defense

Vibration of Railway Bridges

Improved Shaft Coupling

Pig Iron Breaker

Experimental Boiler Explosion

Mechanical Inventions

Steam Boiler Notes

Engineering Inventions

New Worm and Worm Wheel and Gear Cutter

Dynamic Electricity

The Depolarization of Electrodes

By Geo. M. Hopkins

The Flying Squirrel

By R. W. Seiss

The Tape Worm

Miscellaneous Inventions


  • Departments


  • Recent Inventions

  • Notes and Queries

  • Business and Personal

  • Index of Inventions

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