Advanced Geography . hs of the moisture moving towardsthem. There is very little moisture in the air above the peak ofMt. Everest. The effect of such a barrier is very marked. Few of the kindsof plants which thrive south of the Himalayas are found north ofthe great chain. There is but little food to be found on the loftyslopes, and not ,many wild animals therefore can travel from oneside of the chain to the other. The Himalaya mountains separate two races of men, — theyellow people on the north and the white people on the to the difficulty of crossing the range, these races have ne
Advanced Geography . hs of the moisture moving towardsthem. There is very little moisture in the air above the peak ofMt. Everest. The effect of such a barrier is very marked. Few of the kindsof plants which thrive south of the Himalayas are found north ofthe great chain. There is but little food to be found on the loftyslopes, and not ,many wild animals therefore can travel from oneside of the chain to the other. The Himalaya mountains separate two races of men, — theyellow people on the north and the white people on the to the difficulty of crossing the range, these races have neithertraded nor warred to any great extent with each other. Just north of the Himalaya chain, the valleys in theplateau of Tibet are deep, because for a long time their rivers have ^ ~——*^ ^a(^ outlets to the sea and have j/sk ^v carried away a great quantity A&^Js^mL-. ;s? ~~J$k^ >? of waste from the valleys. These val-eys are drained byt wo large rivers,the Indus and theBrahmaputra, —he one flowing. westward and the other eastwardbehind the range, and then escaping by deep gorges thatthey have cut through the mountains. The upper parts of the Indus and Brahmaputra riversare fed chiefly by snow melting on the lofty the sides of these streams are found most of thepeople who live in the highland of Tibet. They havesmall gardens and herds of yaks. To the natives ofTibet, the yaks are as useful as cattle are to Compared with the Appalachian mountains, the Himalayas arevery young. Their slopes are steep and the waste is quicklywashed away. Sometimes great landslides take place, — oftenblocking river valleys and thus forming lakes. When thesesuddenly break through the barriers, the water sweeps in a flood 1 The average height of the plateau of Tibet is 14,000 or 15,000 feet. 2 Lesson 102 tells some of the uses of yaks. 66 HIGHLANDS OF SOUTHWEST ASIA. down the valleys, doing much damage to villages and the rainy summer seasons, mud avala
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