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Comparative Operating Cost of Horse and Electric Delivery Wagons

The Wage of Original Research

Spain Sells Cruisers

Floating of the Paris

Animal Tool-Users, Engineers, and Mechanics

By James Weir

Time of Transatlantic Passage Again Reduced

Brooms as Germ Breeders

A Simple Mold for Composition Rollers

The Eastman

A Simple Tool for Cutting Pipes

Moving a 500-Ton Train-Shed Arch

Niagara Falls Power Plant

Alessandro Volta

A Catalina Walking Fish

By C. F. Holder

To Inventors July 22, 1899


  • Letters

    Correspondence - July 22,1899

  • Recommended

    New Books, Etc. - July 22, 1899

  • Departments

    Recently Patented Inventions - July 22, 1899

  • Business and Personal - July 22, 1899

  • Index of Inventions - July 22, 1899

  • Notes and Queries - July 22, 1899

  • Patents -July 22, 1899

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July 22, 1899

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