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The Chicago Police Telephone and Patrol System

Our City Sewerage

Legislating Against Progress

Permanent Pictures on the Retina

Pickett's Cave

By H. C. Hovey

New Cooling Cask

Richard's Registering Barometer

Cane with Toilet Combination

Engineering Inventions

New Game Counter

Reversible Tools

A Mechanical Finger for Use in the Photographing of Engravings

Bursting of Fly-Wheels

By Geo. M. Hopkins

Machine for Grinding Bands on Goblets

Sevres Vase

A Curious Inhabitant of the Sargasso Sea and Its Nest

Ozoniferous Plants

Blackford's Trout Show


  • Departments

    Recent Inventions

  • New Inventions

  • Business and Personal

  • Notes and Queries

  • New Books and Publications

  • Index of Inventions

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