Volume 11, Issue 6
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Features
Gardner's Pocket-Knife
Fairbairn on Steam Boiler
Some Effects of Magnetism Illustrated
Miscellaneous Summary
Improvement in the Bessemer Process
Mechanical Inspirations
Irregular Action of Gunpowder
Breech-Loading Repeating Rifles
Insecurity of Life in English Cars
One Thing to Make For the Sanitary Commission
Not in Anger
The Defense of New York Harbor
Cast-Iron Boilers
The Hecker and Waterman Experiments
Perfumery
Special Notices
To Our Readers
Patent Claims
Issued From the United States Patent-Office for the Week Ending July 26, 1864