Scientific American Magazine Vol 72 Issue 17

Scientific American Magazine

Volume 72, Issue 17

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Features

Petroleum, the Great Illuminant

The Prentiss Calendar and Time System

A Watchmaker's Staking Pliers

An Automatic Time Dater

An Improved Car Fender and Brake

An Improved Car Brake

Improved Knitting Machinery

The Nafew-Lovell Check Protector

The West Side Metropolitan Elevated Railway System of Chicago

Some Interesting Animals

James D. Dana

Departments

Correspondence - April 27, 1895

Recently Patented Inventions - April 27, 1895

New Books and Publications - April 27, 1895

Index of Inventions - April 27, 1895

Notes and Queries - April 27, 1895

Business and Personal - April 27, 1895

Patents - April 27, 1895