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Improvements in Paper Machinery

Notes on Naval and Military Affairs

Gas Furnaces for Glass

Iron for Buildings

The Worthlessness of Our Forts

Coal--Its Cost and Supply

Porous Water-Proof Cloth

The Quality of Iron Plates

Our Military Department

Manuring Plants through their Leaves

Valuable Receipts

New Discovery in Iron-Clad Ships

Miscellaneous Summary

Recent Foreign Inventions - September 6, 1862

Patents Claims - September 6, 1862

Issued from the United States Patent Office

Recent American Inventions - September 6, 1862

To Our Readers


  • Letters

    Correspondence - September 6, 1862

  • Departments

    Notes and Queries - September 6, 1862

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