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Features

The Airship and the Aeroplane

The American Scholarships at Oxford

Men of Wealth as Inventors

Unjust and Ungenerous

Record of American Auto Shows

Science Notes

Electric Searchlight for Field Service

Railroad Train Taking Its Own Photograph

Home-Made Device for Decorating Glass

A New Variable Speed Transmission

The Mechanical Work of the Twelfth Census

By Edward W. Byrn

Some Interesting Features of the Krupp Works at Essen

By Henry L. Geissel

A Boat on Wheels

By John L. von Blon

An Insect Geometrician

By Herman Muckermann

Patent Department

The Hanson-Lee Typewriter

Business and Personal Wants

Departments

  • Departments

    Legal Notes - April 19, 1902

  • Index of Inventions - April 19, 1902

  • Recently Patented Inventions - April 19, 1902

  • Patents - April 19, 1902

  • Notes and Queries - April 19, 1902

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April 19, 1902

Beyond XX and XY

Biology. Identity. Equality.