Issue 2 and Volume 60.

AIR LIFT PUMPS The increasing use of deep wells as sources of water supply for the cities of Iowa has greatly stimulated the introduction of air lifts. In one way they are superior to pumps other kinds because of the lack of moving parts in the well and the large rate of flow which can be obtained by their use. These are especially desirable qualities when one or two wells are depended on to furnish the entire water supply of a town. Opposed to these desirable qualities is the low efficiency of the device. Its use should therefore be limited to those cases where efficiency can be sacrificed for increase in well output. The use of the air lift should therefore, as a rule, be limited to crooked wells or those in which water must be pumped from a greater depth than 200 feet. Though air lifts have been used…

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