Abstract
THE Russian Geographical Society has just issued a new volume which contains an important contribution to the much debated question as to the old beds of the Amu-daria. It is written by the mining engineer, A. M. Konshin, and contains a geological map showing the extension of the Pliocene and modern Caspian deposits, as well as of the Loess and the fluviatile deposits in the Transcaspian region, and a number of drawings of dunes and barkhans (of aeolic origin), and small plans of the Uzboi and the Ungus (supposed old beds of the Amu).1
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