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Renewal of Niagara Suspension Bridge

Chemical Action in a Magnetic Field

Important Telephone Decision

The Great Comet of 1881

The Spread of the Carpet Beetle

Wood Weaving

Gamgee's Zeromotor

Explosion of a Rolling Mill Boiler in Pottsville, Pennsylvania

By S. N. Hartwell

Lighting Gas by Electricity

Improved Hoisting Apparatus

Panel Decorations for Eaton Hall


Firework Formulæ

Chemical Paradoxes

Communication Received


  • Departments

    Correspondence - July 16, 1881

  • Business and Personal - July 16, 1881

  • Notes and Queries - July 16, 1881

  • Index of Inventions - July 16, 1881

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