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Ventilated Cooling Apparatus

Editorial Correspondence

Villard's Rotating Chimney Cap

The Allen-Porter-Whitworth High-Speed Engine

Machine Tools at the Exposition

Facts About Explosions of Steam Boilers

The Sampson Scale

New Publications

Recent American and Foreign Patents

Editorial Summary

The Paris Exposition--Official List of the Awards to American Exhibitors

Business and Manufacturing Items

Answers to Correspondents

Malleable Cast Iron

Rights of Property in Inventions

Sources of National Importance

Notice to Subscribers

Persistence the Essential Element of Success

Practical Mechanics as Visitors to the Great Exposition

Patents and Claims

State of the Patent Office

King's Spring Fishhook and Trap


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