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Features

Improved Quartz Stamper, An English Ship-Builder on American Engines, and more

Oil-Mining Machinery Wanted

Notes on New Discoveries and New Applications of Science

Why Not?

Emerson's Swage for Spreading and Sharpening Saw Teeth

The Miantonomoh at Queenstown

Special Notices

Irwin's Lamp Top

Building of Roads for Common Travel

Canadian Patents

Man-Holes and Safety Valves

Patent Claims

Issued from the U. S. Patent Office

The Sewing Machine and the Shoe Manufacture

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    Correspondence

  • Notes and Queries

  • New Inventions

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Why Do Facts Fail?

Why Do Facts Fail?

Deconstructing Denial