The Earth's Atmosphere
Its Properties and Extent
Its Properties and Extent
By Our Berlin Correspondent
Aztec Irrigation of the Sixteenth Century
By the Berlin Correspondent of the Scientific American
Presidential Address at the Recent Optical Convention in London
A Review of Twenty Years' Progress
A Natural Phenomenon Illustrated by Artificial Means
With Reference to Its Granular Form
Some Interesting Experiments With the Ruhmkorff Coil
An Industry of About Thirty Years' Standing