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Welding Steel Cold
Ventilation in Health and Sickness—Hospitals
To Our Readers
The Monster Cannons of America and England
The Great Defeat
Sir Peter Fairbairns' Patent
Recent American Inventions
Poison by Lead Pipes
Patent Claims - August 3, 1861
Old Chinese Wrought-Iron Breech Loading Cannon
National Encouragement to the Novelties of Inventors
Iron Clad Ships of War in Congress
Instructions about European Patents
Improved Camp Chest, Resistance of Cast Iron to Internal Pressure
Hydrogen Gas as a Fuel for Domestic Purposes
Fairbairn's Improvement in Rollers for Preparing Flax
Does Throwing Water on Fire Increase the Heat
American Fire Engines for Europe
Letters to the Editors
Correspondence - August 3, 1861
Notes and Queries - August 3, 1861
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