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Features

Improved Slotting Machine and Slotting and Planing Tool

A Congressional Patent Discussion

A Remarkable Report about Remarkable Pumping Engines

American Soda

The Great Lava Flood of Oregon

Dangers of Nursery Explosives

Acoustic Darkness and Mental Light

Scientific Results of the Polaris Expedition

Nerve Force

Improved Self-Closing Faucet Attachment

Watson's Butter Former

Font Pen with a Capillary Feeder

Schofield's Improved Needle Threader

The Newfoundland Devil Fish

Barnum's Removable Horseshoe Calk

Chemical Notes

Improved Automatic Tool Grinding Machine

Improved Circular and Band Saw Set

House Top Gardening

Decisions of the Courts - March 21, 1874

United States Circuit Court

Recent American and Foreign Patents

Importance of Advertising

Patent Office Decisions

To New Subscribers

Answers to Correspondents - March 21, 1874

Canadian Patents - March 21, 1874

LIST OF PATENTS GRANTED IN CANADA,

Communications Received - March 21, 1874

Departments

  • Letters

    Correspondence - March 21, 1874

  • Recommended

    New Books and Publications - March 21, 1874

  • Departments

    Business and Personal - March 21, 1874

  • Index of Inventions - March 21, 1874

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March 21, 1874

Help Us Reforest the Mississippi River Valley