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Scientific American Magazine Vol 67 Issue 8

Scientific American Magazine

Volume 67, Issue 8

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Features

The Earth and the Inner Moon of Mars

Psychology of Invention

Unscientific and Scientific Divining Rods

M. Hopkins

An Improved Fire Engine Pump

The Steel Steamer Choctaw

The Moon and Mars

The Looped Path of Mars

The Homestead Difficulties

A Deep Basement

Departments

To Inventors- August 20, 1892

New Books and Publications- August 20, 1892

Index of Inventions- August 20, 1892