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Features

Improved Portable Engine, Mechanical Engineers

Age of the Sun--Force and Heat

Miscellaneous Summary

Our National Defenses

The Optics of a Looking-Glass

The Fertility of Inventors

Norton's Combined Stamp Eraser and Post-Mark

Connections of Slide Valves

Jerked Beef and Meat Biscuit

How to Break Your Neighbor's Leg

How Mechanics Are Made

Heating and Bending Armor-Plates

The Engineering System of the English Navy

The International Exhibition at Hamburgh

Patent Claims

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August 15, 1863