Scientific American Magazine Vol 12 Issue 3

Scientific American Magazine

Volume 12, Issue 3

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Features

Improved “Dead-Center Lift”

Report of the Chief of the Bureau of Ordnance

The Plants and Animals of the Petroleum Rocks

Punched and Drilled Holes in Plates

Polytechnic Association of the American Institute

Turning Tools

New Books and Publications

Recent American Patents

Miscellaneous Summary

Special Notices

Notice to Subscribers

Dodge's Adjustable Caster for Sewing Machines

Steam on Common Roads

What is Utility

Charcoal

The Torpedo Ship

Patent Claims

Departments

Correspondence

Notes & Queries

Patents