250 



THE IRRIGATION AGE. 



movement it is 'but natural and just in the promotion 

 of this spirit that the International Irrigation Congress 

 should hold a session in Canada, and finally, editorials 

 of this description do not benefit the cause for which 

 your journal is maintained or for which it should be main- 

 tained. 



\Ye shall be pleased if you will find space in your 

 columns for this letter. 



Yours very truly, 



NORMAN S. RANKIN, 



Secretary of Western Canada Irrigation Association, 

 Calgary, Alberta. 



SOME CENTRIFUGAL PUMP POINTERS 



(Continued from Page 242.) 



Before starting for the first time it is advisable 

 to clean out the bearings thoroughly, including the 

 thrust bearing, by pouring in kerosene and allow- 

 ing it to run out at the bottom, as dirt and other 

 substances are liable to get into the bearings dur- 

 ing shipment. The bearing should then be filled 

 as full as possible with first-class lubricating oil 

 similar to dynamo oil. After priming, the pump 

 can be started up and brought up to speed with the 

 discharge valve closed. The discharge valve can 

 then be, immediately opened until the desired quan- 

 tity of water is obtained. If the total head is greater 

 than that for which the pump was designed, the 

 quantity of water discharged will be less than full, 

 capacity, and may even be nothing at all if the head 

 is enough greater. The power will also be less than 

 the power required for the head for which the pump 

 was designed, If the total head is less than the 

 head for which the pump is designed, the amount of 



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