Summary

P. V. N. Myers A General History for Colleges and High Schools…

Basin of the Tigris and Euphrates.—The northern part of the Tigris and Euphrates valley, the portion that comprised ancient Assyria, consists of undulating plains, broken in places by considerable mountain ridges.
But all the southern portion of the basin, the part known as Chaldæa, or Babylonia, having been formed by the gradual encroachment of the deposits of the Tigris and Euphrates upon the waters of the Persian Gulf, is as level as the sea. During a large part of the year, rains are infrequent; hence agriculture is dependent mainly upon artificial irrigation.
Source: Wikisource

P. V. N. Myers A General History for Colleges and High Schools…

These foreigners were nomadic in habits, and altogether much less cultured than the Accadians. Gradually, however, they adopted the arts and literature of the people among whom they had settled; yet they retained their own language, which in the course of time superseded the less perfect Turanian speech of the original inhabitants; consequently the mixed people, known later as Chaldæans that arose from the blending of the two races, spoke a language essentially the same as that used by their northern neighbors, the Semitic Assyrians.
Source: Wikisource

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