242 



THE IRRIGATION AGE. 



general impression is, or has been, that a centrifugal pump is 

 only capable of handling large capacities under low elevations, 

 and that the pump is somewhat wasteful of steam. This is 

 not so. A centrifugal pump can be built to elevate water 

 several hundred feet high, although, of course, a somewhat 

 special construction must then be used. 



preciable wear, while a direct-acting steam pump with its tight 

 fitting plungers, valves, etc., would very quickly wear out, or 

 at least wear so that there would be an enormous slippage. 



We suggest that the tables given on pages 15 and 17 of 

 our catalogue should be printed, as they give the amount of 

 water the different sizes of pumps deliver, together with 



u 



As regards the amount of power it takes, the efficiency 

 of the pump is from 60 to 70 per cent, according to size, al- 

 though very much also depends upon the care in the design of 

 the pump and how well it is built. There are many centrifugal 

 pumps that only have an efficiency of 40 per cent or less. As 

 compared with an ordinary direct-acting reciprocating steam 

 pump a centrifugal pump can at any time be depended upon 

 to deliver the same quantity of water to the same elevation 

 with less than half the amount of fuel required by the direct- 

 acting pump. 



power required per foot of lift, and general dimensions of 

 the pumps. A cut of Fig. 36, page 14, and Fig. 16, page 16, 

 would show what the regular type of vertical and horizontal 

 pumps are like, and a cut of, for instance, the large pump 

 with directly connected engine, shown on page 29, would give 

 somewhat of an idea of what the large irrigation pumping 

 engines would look like. 



We also believe it might be of advantage to publish the 

 direction for erecting and running centrifugal pumps given 

 on pages 31 and 33, as this information would enable users 



The weight of a centrifugal pump in proportion to its 

 capacity is exceedingly small. The working parts of it are 

 few, practically only a revolving shaft with its runner. There- 

 fore, the pump is balanced, there is no vibration, no expensive 

 foundation required, and the repairs are a minimum. 



As regards pumping from deep or driven wells, there is 

 no pump that is as satisfactory as a centrifugal pump. A well 

 always delivers a certain amount of sand with the water, espe- 

 cially to begin with, with a newly-driven well, and a cen- 

 trifugal pump will handle the sand and water without ap- 



of pumps for irrigation work to fully understand the principle 

 of the working of a pump, and in case of trouble they would 

 refer to this chapter. 



Any further information you may require on the subject 

 we will cheerfully give, and we have written to our Texas 

 representative to see if we can obtain from him any photo- 

 graphs showing plants in service. Yours truly, 



CARL LAGER, 

 Supt. Morris Machine Works, 



Baldwinsville, N. Y. 



