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Features

Recent Improvements in the Pneumatic Dynamite Gun

The Smoke Nuisance

An Improved Lawn Cleaner

An Improved Fumigator

An Eraser for Use on Blackboards

A Device for Manipulating Doors and Windows

Improved Steam Boiler

An Improved Lifting Truss Girder

A Register and Recorder for Revolving Shafts

An Improved Mechanical Movement

An Improved Safety Indicator for Elevators

Daisies and Thistles Proscribed by Law

The New German Armored War Ship Siegfried

Photographic Notes- September 20, 1890

Departments

  • Letters

    Correspondence- September 20, 1890

  • Departments

    Business and Personal- September 20, 1890

  • Index of Inventions- September 20, 1890

  • Notes & Queries- September 20, 1890

  • Recently Patented Inventions- September 20, 1890

  • To Inventors- September 20, 1890

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September 20, 1890

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