Volume 6, Issue 9
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Features
Improved Candle Molds
Notes on Military and Naval Affairs
The Chemistry of Coal
Surface Condensers for Steam Engines
The Plan of Creation
History of the Heliographic Art in Europe and America
Smith's Patent Nut Cracker
The Proposed New Iron Gunboats
What Can Be Done for Inventors--Advice Gratis and Advice for Pay
Agassiz as a Lecturer
Hours of Study
Our Iron-Clad River Boats in Battle
Agassiz on the Existence of God
The Inventor and the National Crisis
Cartridges--Their History
Notes on Foreign Inventions and Discoveries
Patent Claims
Issued from the United States Patent Office