Volume 12, Issue 8
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Features
Visit to a Petroleum Refinery
Wool from Pine Trees
Is the Blockade Effective
Recent American Patents
Special Notices
Remarks on the Subject of Force in General
Count Rumford's Discover That Heat is Motion
Mr. Mushet and the Bessemer Process
The Railroad Under Broadway
Ordnance and Armor
The Cause of Boiler Explosions
The Sweetness of Fermented Bread
What a Great Thing An Army Is
Experiments With Car Brakes
Inactivity
Patent Claims
Issued from the United States Patent-Office