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Double-Decking the Brooklyn Bridge

The Torpedo-Boat Fiasco

Reclaiming Our Coast Lands

Possibilities of a Steel Panic

Germany's Export Trade in Her Hour of Need

A New Polar Expedition

Science Notes

New Salt of Glucinium

Mail Transportation in Cities

By Waldon Fawcett

Curious Horn Growth

Portable Coal-Loading Machine

Home-Made Electric Night Lamp

By George M. Hopkins

How to Make a Cheap Hydrometer

By Parker S. Simonsen

The New York Assay Office

The Improvement of Washington

By Our Washington Correspondent

The Yerkes Observatory Two-Foot Reflector

By Mary Proctor

A Pigeon Ranch

By Charles F. Holder

Business and Personal Wants


  • Departments

    Recently Patented Inventions - February 15, 1901

  • Index of Inventions - February 15, 1901

  • New Books, Etc - February 15, 1902

  • Notes and Queries - February 15, 1901

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February 15, 1902

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