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Notes on Military and Naval Affairs
Polytechnic Association of the American Institute
Hunter's Army and Travelers' Compass
Ludlow's Sliding Stop Valve
The Craig Microscope
Grease and India Rubber
Torpedoes to Destroy Vessels
Printing in Colors
A Good Move in Life Insurance
Americans at the Great English Exhibition
Revolving Turrets for Barbette Guns
Recent American Inventions
Patents Claims
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