Cultural and geographical exploration

Articles originally published in "National Geographic" tell of the archeological searches for the ruins of Chaco Canyon, where the Navaho, Zuni, and Hopi Indian tribes lived, as well as the Pueblo Bonito expedition.

Articles originally published in "National Geographic" chart the expansion of travel by automobile and railroad in the 1920s and its effects on American society.

Reprints an article and accompanying photographs about life in Maghreb in the years before the First World War, which first appeared in "National Geographic" magazine in January 1914.

Relates the history of how the Panama Canal was planned and built, including the political, economic, and health aspects of getting the project completed.