Volume 20, Issue 8
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Features
The Ellershausen Process of Manufacturing Iron
How Common Window Glass is Made
Inventor of Stereotyping—William Ged
Lecture on the Spectroscope
The Therapeutics of Wakefulness
Modern Wrenches and Their Antecedents
Bicknell's Patent American Window Weight Pulley
Velocipede Notes
Chemical Invention
How Workingmen May Obtain Facilities for Intellectual Improvement
How Contracts are Awarded—Gross Frauds in the Patent Office
Cheese and Nuts
Modern Musical Instruments
Transfusion of Blood
Editorial Summary
“Waste” and “Economy” of Fuel
Recent American and Foreign Patents
Steam Pump Valves
Important Decision under the Patent Laws