Volume 20, Issue 15
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Features
On the Theory of the Luminosity of Flames
Explosive Compounds for Engineering Purposes
Progress of the Velocipede
Obituary-Luther Atwood
Write Legibly and Intelligently
Gross' Patent Combined Letter Opener
Small-Pox and Vaccination
The Natural Highways of Travel
The Scientist, Inventor, and Mechanic
The Preservation of Timber
Ventilation in Buildings
Taste and Smell—A New Theory
Beet Root Sugar
Applications for the Extension of Patents
Editorial Summary
Manufacturing, Mining, and Railroad Items
Recent American and Foreign Patents
Official List of Patents
Issued by the United States Patent Office