316 



Irrigation and Drainage 



The total water pumped during the year by this windmill 

 was enough to cover 79.1 acres 12 inches deep, thus showing an 

 average daily rate of 2.6 acre-inches. The 

 largest amount of water pumped on any 

 single day was 39,540.2 cubic feet, or a rate 

 for 24 hours of 27.46 cubic feet per min- 

 ute. There were short times occasionally, 

 however, when more water than this was 

 pumped, but the capacity of the siphon 

 was such as to cause it then to discharge 

 continuously, and thus prevent a record be- 

 ing made. 



Most of the water was lifted by two 

 pumps, working singly or in combination. 

 These were an Aermotor 14-inch reciprocat- 

 ing pump, worked on a 9-inch stroke, repre- 

 sented in Fig. 73, and a Seaman & Sclmske 

 bucket pump, with 1 -gallon buckets, as 

 represented in Fig. 74. When the wind 

 was light the mill was given the bucket 

 pump, when stronger the reciprocating 

 pump, and when strongest both pumps at 

 Fig. 74. Bucket irriga- the same time, and more work was ac- 

 tion pump, complished in this way than would have 

 been possible with any single pump. 



WATER PUMPED DURING 10-DAY PERIODS 



Since the availability of w r ind power for irrigation is limited 

 not so much by the total work of the year as by the water 

 which may be pumped in times of special need, a clearer idea 

 of the possibilities of wind power for irrigation can be gained 

 by tabulating the work done during the year by 10 -day periods. 

 This has been done in the table which follows, but first reducing 

 the results to a lift of 10 feet instead of 12.85 feet, the height 

 the water was actually raised : 



