Volume 25, Issue 12
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Features
Jonathan Dennis, Jr's Appeal
The Fog Bow as Seen from the Matterhorn
The New York Iron Founders Grievance--A System of Shameless Extortion
Boiler Explosions
Narrow Gage Nonsense
The Labor Problem--Class Oration for 1871 at Yale
Pharmacy in Prussia
The Introduction of India Rubber Shoes
On Certain Habits Considered as Necessities of Modern Civilization
Scientific Intelligence- September 16, 1871
Occasional Notes- September 16, 1871
Answers to Correspondents- September 16, 1871
Recent American and Foreign Patents- September 16, 1871
Queries- September 16, 1871
Official List of Patents—September 16, 1871
Issued by the U. S. Patent Office