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Commerce of the Great Lakes

Position of the Planets in January

Date Boundary Line

How to Judge the Quality of Condensed Milk

A Device for Developing the Lungs and Enlarging the Chest

An Improved Trap

A Device to Cool or Heat Liquids

A Window Opening and Closing Device

Plate Rolling at the Krupp Works, Essen

Improved Oil Light Lantern

A Separable Ocean Steamer Built on Lake Michigan

A Military Suspension Bridge

Optical Illusions Adapted to the Lantern

By Geo. M. Hopkins

Repairing the Steamship La Champagne with an Adjustable Bow and Stern Dock

A Double Type Composing Stick


  • Letters

    Correspondence- December 27, 1890

  • Departments

    Recently Patented Inventions- December 27, 1890

  • Business and Personal- December 27, 1890

  • Index of Invention- December 27, 1890

  • To Inventors- December 27, 1890

  • Index- December 27, 1890

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