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New Cab

Could a Hostile Fleet Bombard New York ?

Science Teaching in Schools

A Chance for Inventors.--The $5,000 Car

Traveling Flies

The De Bay Propeller

French Pill Printing Machine

New Portable Oven

Hens' Wire Nests

The First Inventor of the Steam Gauge

New Beer Faucet

The American Science Association

Engineering Inventions

Double Treadle Attachment

Miscellaneous Inventions

Improvement in Billiard Tables


By A. W. Roberts


Mechanical Inventions

Count Louis Francois De Pourtales

Reasonable Diligence

The Location of the Lick Observatory

The Causes of Terrestrial Magnetism


  • Departments


  • Recent Inventions

  • Business and Personal

  • Index of Inventions

  • Notes and Queries

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September 25, 1880

Confronting Common Wisdom