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Proceedings of the National Academy of Sciences

Improved Fulling Mill

The Coming Arctic Expeditions

Schools of Observation

Dangerous Houses

The Antiquity of Life

Deadly Ballooning

The Laws of Storms

Patent Litigation in England and the United States

Engine Valve Motion

Improved Chisel Tooth Saw

Improved Turpentine Tool

Improved Attachment for Injectors

Stewart's Improved Stove Damper

Scientific and Practical Information - May 22, 1875

Practical Mechanism

By Joshua Rose

Improved Yarn Spooler

Improved Skein Setter

The Death's Head Moth

The Scorpion Fly

Car Axles and Couplings

Recent American and Foreign Patents - May 22, 1875

Communications Received - May 22, 1875

Departments

  • Letters

    Correspondence - May 22, 1875

  • Departments

    Business and Personal - May 22, 1875

  • Notes and Queries - May 22, 1875

  • Index of Inventions - May 22, 1875

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Why Do Facts Fail?

Why Do Facts Fail?

Deconstructing Denial