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Defective Boilers and Incompetent Engineers

Inventors at the World's Fair

An Improved Boiler Furnace

Improved Method of Handling Nitro-Glycerine

Improved Steam Whistles

A Salt Sprinkler for Table Use

Eruption of the Volcano of Etna

Great Mineral Water Baths

Cyrus W. Field

Inexpensive Electric Motors

A Visit to Chalcedony Park, Arizona

By H. C. Hovey

The Water Lily House at Kew


  • Departments

    Recently Patented Inventions- July 23, 1892

  • Notes and Queries- July 23, 1892

  • Business and Personal- July 23, 1892

  • Index of Inventions- July 23, 1892

  • To Inventors- July 23, 1892

  • Patents- July 23, 1892

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July 23, 1892

Beyond XX and XY

Beyond XX and XY

Biology. Identity. Equality.