Volume 21, Issue 11
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Features
Improvement in Steam Engines
The Science Association
On the Distribution of Copper in the Animal Kingdom
The Story of a Boulder
Apparatus for Generating Illuminating Gas from the Light Hydrocarbons
Observations of the Eclipse as Seen at West-Port, KY
Duration of the English Coal Fields—The Internal Temperature of the Earth
Dyeing Silks—Preparation of the Raw Silk Previous to Dyeing
Fire and Rat-Proof Buildings
Improvement in Buckets
Heat and Work
Business Hints
Incidental Observations
The Street Crossing Question
The Effects of Night Soil on Vegetation
Location of Heaven
Ocean Telegraphy
Calculations About Human Life
Marks Produced upon the Body by Lightning Stroke
Oxford Wins
Editorial Summary
Injunction in Patent Cases
Answers to Correspondents
New Publications
Recent American and Foreign Patents
Manufacturing, Mining, and Railroad Items
Official List of Patents
Issued by the United States Patent Office