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Irrigation and Drainage 



THE USE OF ANIMAL POWER FOE LIFTING WATER 

 FOR IRRIGATION 



Many and very old are some of the devices invented to 

 utilize both human strength and that of cattle and horses. 

 Fig. 78 represents the Persian wheel, very extensively used in 

 Asia Minor and in Egypt for lifting water, two cattle raising 

 as much as 2,000 cubic feet per day on low lifts. A more 



Fig. 81. Doon of India. (Wilson, U. S. Geol. Survey.) 



modern device is represented in Fig. 79, where one horse may 

 elevate through a height of 20 feet 500 cubic feet of water per 

 hour and 5,000 per day of 10 hours, or a rate which, if followed 

 for 100 days, would give more than 11 acres 12 inches of water 

 in depth. 



Much land is irrigated in India, Asia Minor and Egypt, 

 where the water is lifted by man-power, and Figs. 80 and 81 

 show two of the forms of lifting devices upon which men are 

 worked. Two men, working alternately, are said to irrigate an 

 acre in 3 days with the shadoof, lifting the water about 4 to 6 

 feet. 



