. Farm machinery and farm motors. riG. 193—A ROTARY TUMP 386. Rotary pumps are used to some extent in pump-ing about the iarn-i. They are not suited for high lifts,as there is too much slippage of the water past thepistons. They are not very durable, and it is doul)tful ifthey will ever come into extensive use. 387. Centrifugal pumps are used where a large quan- 272 FARM MACHINERY tity of water is to be moved through a short lift, as indrainage and irrigation work. They are efficient machines. FIG. 194—SECTION OF A ROTARY PUMP SHOWING PISTONS for low lifts at least, and will handle dirty water
. Farm machinery and farm motors. riG. 193—A ROTARY TUMP 386. Rotary pumps are used to some extent in pump-ing about the iarn-i. They are not suited for high lifts,as there is too much slippage of the water past thepistons. They are not very durable, and it is doul)tful ifthey will ever come into extensive use. 387. Centrifugal pumps are used where a large quan- 272 FARM MACHINERY tity of water is to be moved through a short lift, as indrainage and irrigation work. They are efficient machines. FIG. 194—SECTION OF A ROTARY PUMP SHOWING PISTONS for low lifts at least, and will handle dirty water better mthan any other kind of pump. Centrifugal pumps are
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