The opinion that Lake Aral periodically disappeared, which was for a long time countenanced by Western geographers, loses more and more probability now that it is evident that at a relatively recent period the Caspian Sea extended much farther eastward than it does now, and that Lake Aral communicat
Mushketov, Turkestan (St Petersburg, 1886), with bibliographical references; Ivashintsev, Hydrographic Exploration of the Caspian Sea (in Russian), with atlas (2 vols., 1866); Philippov, Marine Geography of the Caspian Basin (in Russian, 1877); Memoirs of the Aral-Caspian Expedition of 1876-1877 (2
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