AGRICULTURAL E:N^GINEERIN'G. 



181 



CAPACITIES OF WIND^IILLS AND PU3IPS. 



(Irrigation Age.) 



Sizes of Irrigation 3Iills and Pumps best Adapted for 

 each other to AVork Successfully under Ordinary 

 Conditions. 



jo-/oot Mills. 



ID 



lO 



12-foot Mills. 



J 4 'foot Mills. 



90X75 

 90X60 

 60X40 

 50X30 



* Amount of land that can be covered i ft. deep with windmills work- 

 ing- at the rate of 15 hours per day for 300 days in the year. Acres cov- 

 ered I ft. deep. 



t Capable of holding water for 24 hours" continuous pumping. These 

 sizes should have 4 ft. depth of water, height of bank 5 ft., width of base 

 16 ft., 2 ft. of water below discharge-pipe not included. These reservoirs 

 to connect with additional reservoir by overflow-pipe in order to utilize 

 full capacity of mills and pumps. Overflow-reservoir should be of i- and 2- 

 acre capacity, 8 ft. deep, banks 9 ft. high, base of bank 45 ft., acre size 

 2og ft. on each side, corners rounded; a-acre size 2og X 418 ft. 



