where it joins the snow-clad Darvaz range, and where the group Sandal, adorned with several glaciers, rises to 24,000 or 25,000 ft. Only three passes, very difficult, are known across it. Darvaz, a small vassal state of Bokhara, is situated on the Panj, where it makes its sharp bend westwards, and is emphatically a mountainous region, agriculture being possible only in the lower parts of the valleys. The population, about 35,000, consists chiefly of Moslem Tajiks, and the closely-related Galchas, and its chief town is Kala-i-khumb on the Panj, at an altitude of 4370 ft. The chief river of Bokhara is the Oxus or Amu-darya, which separates it from Afghanistan on the south, and then flows along its south-west border. It is navigated from the mouth of the Surkhan, and steamboats ply on it up to Karki near the Afghan frontier. The next largest river, the Zarafshan, 660 m. long, the water of which is largely utilized for irrigation, is lost in the sands 20 m. before reaching the Oxus. The Kashka-darya, which flows westwards out of the glaciers of Hazret-sultan (west of the Hissar range), supplies the Shahri-sabs (properly Shaar-sabiz) oasis with water, but is lost in the desert to the west of Karshi. The climate of Bokhara is extreme. In the lowlands a very hot summer is followed by a short but cold winter, during which a frost of -20 deg. Fahr. may set in, and the Oxus may freeze for a fortnight. In the highlands this hot and dry summer is followed by four months of winter; and, finally, in the regions above 8000 ft. there is a great development of snowfields and glaciers, the passes are buried under snow, and the short summer is rainy. The lowlands are sometimes visited by terrible sand-storms from the west, which exhaust men and kill the cotton trees. Malaria is widely prevalent, and in some years, after a wet spring, assumes a malignant character. The population is estimated at 1,250,000. The dominant race is the Uzbegs, who are fanatical Moslem Sunnites, scorn work, despise their Iranian subjects, and maintain their old division into tribes or clans. The nomad Turkomans and the nomad Kirghiz are also of Turkish origin; while the Sarts, who constitute the bulk of the population in the towns, are a mixture of Turks with Iranians. The great bulk of the population in the country is composed of Iranian Tajiks, who differ but very little from Sarts. Besides these there are Afghans, Persians, Jews, Arabs and Armenians. Much of the trade is in the hands of a colony of Hindus from Shikarpur. Nearly 20% of the population are nomads and about 15% semi-nomads.