WIND-MILL FOR rUMriXG WATEPw 



249 



by fig. 268, where A is the circular wind-mill, with a number 

 of sails set obliquely to the direction of the wind, and al- 

 ways kept facing it by means of the vane, B. The crank of 

 the wind-mill, during its revolutions, Avorks the j^ump-rod, I, 

 and raises the water from the well beneath. In whatever di- 



Fiq-. 2G0. 



Bam surmounted ivith wind-mill for pumping watCTf 

 cutting straw, ifC. 



rection the Avind may blow, the pump will continue work- 

 ing. The pump-rod, to work steadily, must be immediately 

 under the iron rod on which the vane turns. If the di- 

 ameter of the wind-mill is four feet, it will set the pump 

 in motion even with a light breeze, and with a brisk wind 

 will perform the labor of a man. Such a machine will 

 pump the water needed by a herd of cattle, and it may be 

 placed on the top of a barn, with a covering, to which may 

 be given the architectural effect of a tower or cupola, as 

 shown in fig. 269. 



A more compact machine, but of more complex con- 

 struction, is shown in fig. 270, where the upper circle 

 moves around with the wheel and vane on the fixed lower 

 circle, to which it is strongly secured so as to admit of 

 turning freely. In other respects it is similar to the pre- 

 ceding. 



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