PUMPING WATERS. 



of deep well pumping, in which an existing supply of 

 electricity is handy, the choice may be between 



1. The air lift pump. 



2. The centrifugal pump with vertical shaft driven 

 by a motor on the same shaft without gearing. 



3. A Hatfield pump under the same conditions. 



4. Any of the other forms of well pump described. 



Franv 

 vmpressvr 



Impervious 



FIG 75. 



It will be seen, then, that the subject provides ample 

 scope for one's wits. 



The general arrangement of an air lift pump is 

 shown by fig. 75, while a suitable small high-speed 

 compresser is illustrated in fig. 76. 



So much for the actual pumps. 



The pipes through which the water is drawn and 

 forced demand attention, more in fact than is usually 

 bestowed on them. The suction pipes should be of 

 ample size, as short and straight as possible, perfectly 

 airtight, and any bends should be of a large radius 



