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Scientific American Magazine Vol 10 Issue 12

Scientific American Magazine

Volume 10, Issue 12

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Features

Permutating Telegraph Switch

Miscellaneous Summary

New York Markets

Polytechnic Association of the American Institute

Progress of Photography

The Drill and its Office

Casting of a Great Gun--Official Report

Farmers' Club

The Way Inventors, Manufacturers and Consumers are Mutually Benefited

Breech-Loading Small-Arms

The Metropolitan Fair

India-Rubber Once More

What is Meant by the Conservation of Force

Lubricating the Steam-Engine

Recent American Patents

Patent Claims

Special Notices

To Our Readers

Departments

New Books and Publications

Patents Granted for Seventeen Years!

Notes and Queries