Volume 20, Issue 6
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Features
The Chemistry of the Heaton Process
Annual Report of the Commissioner of Patents
Boiler Explosion at Elizabethport, N. J.
Manufactures in Holyoke, Mass
Cottages for Laboring Classes
Notes on the Velocipede
The Photometer--Lecture by Dr. J. Ogden Doremus
The Stoltz Rotary Inkstand
Why the Right Rather than the Left?
Publication of the Patent Claims
Labor and Capital Not Antagonistic
The Introduction of Steam Fire Engines
Birth of the Solar System
Glass Blowing--How Bottles are Made
Effects of Improper Diet
Answers to Correspondents
Recent American and Foreign Patents
New Publications
Obituary
Manufacturing, Mining, and Railroad Items
Official List of Patents
Issued by the United States Patent Office