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Scientific American Magazine Vol 61 Issue 10

Scientific American Magazine

Volume 61, Issue 10

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Features

The Hudson River Tunnel

Government Contracts Undesirable

Elias Loomis

An Improved Governor

An Improved Game Apparatus

An Improved Window Ventilator

An Improved Astronomical Mirror

An Automatic Ash Sifter

The Boynton Bicycle Engine

An Improved Elevator Alarm

The Paris Exhibition

Departments

Business and Personal- September 7, 1889

Recently Patented Inventions- September 7, 1889

Notes and Queries- September 7, 1889

To Inventors- September 7, 1889

Index of Inventions- September 7, 1889