Volume 8, Issue 7
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Features
Miscellaneous Summary
Valuable Receipts
Physiographic Geology
Sherman's Portable Breastwork
How Flints Are Formed
Government Proposals for Cannon
The Science of Iron and Steel
Engines for Screw Steamers
Successful Experiments with Projectiles
Snow
Death of Professor Robinson
Pure and Impure Water
Recent American Patents
Discoveries and Inventions Abroad
Patent Claims
Issued from the United States Patent Office