Volume 20, Issue 18
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Features
Explosive Compounds for Engineering Purposes
Age of Trees and Size of Timber
Beet Root Sugar
Hendricks' Patent Gate Catch
Perkins and House's Non-Explosive Kerosene Lamp
The Philosophy of Alum and Dry Plaster Filling for Fire-Proof Safes
On the Technical Applications of Dialysis
A Long Required Need Supplied
The Postal Telegraph Bill
The Transits of Venus in 1874 and 1882
The New Examiner-In-Chief
Scientific and Mechanical Associations
The New Commissioner of Patents
Velocipede Notes
Galvanized Iron Water Pipes
Patent Cases in Court
Manufacturing, Mining, and Railroad Item
Editorial Summary
Official List of Patents
Issued by the United States Patent Office