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BOARD OF AGRICULTURE. [Pub. Doc. 



the seams are cut, and the water when released flows upward into 

 the well and is ready to be pumped. The yield from wells of this 

 type cannot be predetermined, but such wells are rarely failures. 

 Data taken from the records of the pioneer artesian well company in 

 the State, indicate the average depth of these wells to be from 250 

 to 300 feet, and the average yield from 50 to 60 gallons of water 

 per minute. These deep wells furnish most satisfactory supplies, 

 as the water is usually in a high stale of purity and can be de- 

 pended upon at all times, inasmuch as it has access to the wells at 

 depths where it is not affected by surface conditions. 



Unlike hand driven Avells, surface conditions do not show the 

 depth and dip of water-bearing seams in the bed rock, and they 

 cannot be determined until the work is in progress and the seams 

 opened up in drilling. Consequently wells of this type, in most 



Electric Pumping Outfit. 



cases, may be located at any convenient point in relation to the 

 building to be supplied, thereby eliminating long lines of piping. 



Progressive well drillers, as a rule, keep accurate records of the 

 formations passed through, and the depths where water is found. 

 Accordingly, where work of a similar nature is contemplated, the 

 best way to determine the probable depth and yield of a deep well 

 is to consult the records of firms having had experience in the gen- 

 eral location of the proposed work. 



The modern drilled well, when properly constructed, is immune 

 from the evils common to dug wells and other surface supplies. 

 The method of connecting the well casing to the bed rock, from 

 which point the well is cased all the way to the pump, prevents con- 

 tamination from surface drainage and insures against the entrance 

 of insects and reptiles. 



There are various methods and so-called " systems " in vogue to- 

 day for pumping, storing and distributing the water obtained by 

 the methods as described above. Named in the probable order of 



