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Features

Psychology of Invention

The Earth and the Inner Moon of Mars

Unscientific and Scientific Divining Rods

By M. Hopkins

An Improved Fire Engine Pump

The Steel Steamer Choctaw

The Homestead Difficulties

The Looped Path of Mars

The Moon and Mars

A Deep Basement

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  • Recommended

    New Books and Publications- August 20, 1892

  • Departments

    Index of Inventions- August 20, 1892

  • To Inventors- August 20, 1892

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August 20, 1892

Confronting Common Wisdom