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Features

Roper's Patent Caloric Beam Engine

Miscellaneous Summary

Valuable Receipts

Physiographic Geology

Sherman's Portable Breastwork

How Flints Are Formed

The Science of Iron and Steel

Government Proposals for Cannon

Engines for Screw Steamers

Snow

Pure and Impure Water

Successful Experiments with Projectiles

Death of Professor Robinson

Discoveries and Inventions Abroad

Recent American Patents

Patent Claims

Issued from the United States Patent Office

Frazer's Patent Door-Fastener

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    Correspondence

  • Notes and Queries

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February 14, 1863