
Little-known Ice Ages of Great Antiquity
Most People Know of One Glacial Period. But There Were Several Before That

Little-known Ice Ages of Great Antiquity
Most People Know of One Glacial Period. But There Were Several Before That

The Scientific American Digest, October 1926
A Review of the Newest Developments in Science, Industry and Engineering

The Scientific American Digest, September 1926
A Review of the Newest Developments in Science, Industry and Engineering

The Scientific American Digest, July 1926
Newest Developments in Science, Industry and Engineering

The Scientific American Digest, June 1926
Newest Developments in Science, Industry and Engineering

The Scientific American Digest, May 1926
A Review of the Newest Developments in Science, Industry and Engineering

The Scientific American Digest, April 1926
Newest Developments in Science, Industry and Engineering

The Scientific American Digest, March 1926
Newest Developments in Science, Industry and Engineering

Canned Radio Telegraphy
With Phonographic Records the Army Is Learning Modern Methods of Signaling

The Scientific American Digest, February 1926
A Review of the Newest Developments in Science, Industry and Engineering

The Scientific American Digest, January 1926
A Review of the Newest Developments in Science, Industry and Engineering

Are These Elephants?

Buried Treasure
Apparatus for Locating Underground Minerals, and Pseudo-scientific Imitations

The Scientific American Digest, December 1925
A Review of the Newest Developments in Science, Industry and Engineering

"The Heavens Declare the Glory of God"
How a Group of Enthusiasts Learned to Make Telescopes and Became Amateur Astronomers

The Scientific American Digest, November 1925
A Review of the Newest Developments in Science, Industry and Engineering

Evolution, From the Nebula to 1925
The Story Outlined by the Chart on the Opposite Page

The Scientific American Digest, October 1925
A Review of the Newest Developments in Science, Industry and Engineering

New Light on Evolving Man
Recent Events Have Given the Science of Man's Evolution a New Impetus

The Scientific American Digest, September 1925
A Review of the Newest Developments in Science, Industry and Engineering

Did Man Descend from Monkeys?
The Unqualified Denial of Man's Ape-like Origin Is Misleading and Lacks Candor Teaching Only a Diluted Darwinism

The Scientific American Digest, August 1925
A Review of the Technical and Trade Press, Consisting of Abstracts from Leading Articles Announcing the Newest Developments in Industry and Engineering Exact references to the sources from which these abstracts and quotations are made follow each abstract, the numerals referring respectively to the volume, number, and pages occupied by the original article in order that those who wish for further data may refer to the originals.

The Scientific American Digest, July 1925
A Review of the Technical and Trade Press, Consisting of Abstracts from Leading Articles Announcing the Newest Developments in Industry and Engineering

Out of Doors With the Earth
With a Simple Vacation Equipment, the Amateur May Easily Learn the Meaning of the Earth's Ever-varied Geological Features