Features
Notes on Military and Naval Affairs
Metallurgy of Copper and Zinc
The Chemistry of Coal
Surface Condensers for Steam Engines
Discussion on Gunpowder
The Growth of Coral Reefs
History of the Heliographic Art in Europe and America
Culpable Losses of Army Horses
Professor Agassiz in Brooklyn
The Explosion of Gunpowder
Malleableizing Cast Iron
The Comparative Economy of Steam and Water Power
Enameling Iron
More About Nova Scotia Gold Fields
Sulphurous Acid As a Disinfectant
Salting Streets--The Science of the Question
Patent Claims
Recent American Inventions
Notes on Foreign Inventions and Discoveries
To Our Readers
Mayhew's Patent Kerosene Lamp
Departments
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Correspondence
Notes and Queries
