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Scientific American
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Scientific American Magazine
August 1846
Volume 1
,
Issue 47
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Features
The Independent Door-Lock
Magnetic Telegraph
Departments
Illustration by Comparison
Science of Mechanics
Arithmetical
Jumble
Foreign News
Geological Gleanings in Mississippi
Railroad Intelligence
Be Rational and Consistent
The Soldier's Prayer
Arts and Trades
New Inventions
The Scientific American