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Improved Self-Closing Bridge

Notes on Naval and Military Affairs

Miscellaneous Summary

Polytechnic Association of the American Institute

The Properties of Iron and its Resistance to Projectiles at High Velocities

By William Fairbairn

Character, Cultivation and Use of the Lupine

Photography and Forgery

More About Cotton and its Substitutes

Lupine and Crooked Beam Plows

Malachite and Works of Art

Paper Money as a Government Resource

An American Sculptor

Natural Shape of the Foot--How Boots and Shoes Ought to be Made

The Price of Coal and Burning of Fuel

Wonderful Balloon Ascent for Scientific Purposes--Greatest Hight Ever Attained by Man

Recent American Inventions

Recent Foreign Inventions

Patent Claims

To Our Readers

Valuable Receipts

A New Principle for Fans and Pumps


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  • Notes and Queries

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