Volume 22, Issue 2
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Features
Professor Morse's Official Report upon the Telegraphy of the French Exposition
On Manganese and Some of Its Compounds
Artificial Light from the Pinewood Chip to the Gas Chandelier
The Calabash Tree
Swedish Cooking Appliances
Wells' Improved Eccentric for Steam Engines
The Metric System
The Use of Eyes
Report of the Special Commissioner of Revenue--Tinkering the Income Tax
The Growth of Monopolies
New Facts about the Preservation of Timber
Madder Extracts and their Application in Topical Dyeing
Canal Through the Isthmus of Darien
The Preservation of Meats without Salt
Aerial Navigation
A paper read by John Wise, Aeronaut, before the Franklin Institute, Dec. 15, 1869.
Recent American and Foreign Patents- January 8, 1870
Under this heading we shall publish weekly notes of some of the more prominent home and foreign patents.
Answers to Correspondents- January 8, 1870
Official List of Patents- January 8, 1870
Issued by the United States Patent Office. For the Week Ending Dec. 30, 1869. Reported Officially for the Scientific American.