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Improved Flour Bolts

Manufacture of Puddled Wrought-Iron Direct from the Ore--A New Process

Notes on Military and Naval Affairs

Polytechnic Association of the American Institute

Chemical and Physical Modifications of the Atmosphere Consequent on Habitation

Neill's Combined Knife, Fork and Spoon for the Army

A New Leaf Turned Over in the Polytechnic Association

What Can Be Done for Inventors.--Advice Gratis and Advice for Pay

The Reason Why the Artillery Was Not in the Battle of Newbern--Improvement in Signals Suggested

The Proposed Tax on Patented Articles

Dialysis Applied to the Arts--Silica in Tanning and Preserving Stone Buildings

Recent Progress of the Photographic Art

Recent American Inventions

Patent Claims

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April 12, 1862

See the World from a Different Perspective

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