Features
Notes on Naval and Military Affairs
Specification of an Ancient Patent
The Properties of Iron and Its Resistance to Projectiles at High Velocities
Rotting Hemp and Flax
Vidal's Rock-Oil Lamp
Armor Plates Smashed with Shells--Remarkable Gun Experiments
The Flow of Gold
Explosions of Boilers and Their Causes
Miscellaneous Summary
A French Savant on the Manufacture of Steel
Engineering Examples--The Brunels
Valuable Receipts
Premiums of the American Institute
Recent American Inventions
Recent Foreign Inventions
Patent Claims
To Our Readers
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