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Features

Improved Candle Molds

Combined Writing Case and Checker Board

Notes on Military and Naval Affairs

Surface Condensers for Steam Engines

The Chemistry of Coal

The Plan of Creation

History of the Heliographic Art in Europe and America

By M. A. Root

Smith's Patent Nut Cracker

Agassiz as a Lecturer

The Proposed New Iron Gunboats

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

Hours of Study

Agassiz on the Existence of God

Our Iron-Clad River Boats in Battle

The Inventor and the National Crisis

Cartridges--Their History

Patent Claims

Issued from the United States Patent Office

Recent American Inventions

Notes on Foreign Inventions and Discoveries

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March 01, 1862

Confronting Common Wisdom