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Scientific American Magazine Vol 44 Issue 23

Scientific American Magazine

Volume 44, Issue 23

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Features

Progress of the Hudson River Tunnel

Perpetual Motion Delusions

Electrical Paper

Polarization of Sound

Opening of the New Workshop of the Stevens Institute of Technology

New Belt Clasp

Telegraph Hand Car

Engineering Inventions

New Gang Boring Machine

New Spring Grass Shears

Feed Water Heater and Feed Pump

Mechanical Inventions

New Method of Spacing and Lettering Signs

Leech Farming

A. W. Roberts

John Fitch's Steamboat Experiment on Collect Pond

Communications Received

Departments

Correspondence

Recent Inventions

New Inventions

Notes and Queries

Business and Personal

Index of Inventions