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is only by knowing the permeability of the overlying material at each well that it is possible to judge the amount of water that put to low use. The area a short distance east of wells 19 to 23 rather than from underground leakage from the artesian wells. The ground near the United States Fish Hatchery is being wafer-logged mainly by seepage from the lakes that are maintained by the flow from artesian wells and not from underground leakage. The people in the Las Vegas area should understand that the artesian water supply is not unlimited and that conservation of the supply is neces­sary. It is believed that if the draft upon tho artesian basin were reduced and strict measures of conservation were applied, the pressure, in the shallower sands, especially, would increase noticeably. The water that flows from the wells is clear and does not carry much sediment, and therefore there is little danger of affecting water is not needed. However, the flowing wells should be opened or closed slowly in order to avoid shock from water-hammer that may dislodge any loose material from the walls of the hole. may waste from the well below the ground and the care that is necessary in placing and cementing the casing. New wells should be tightly cased and the casing cemented to a depth of at least 200 feet. Much artesian water that is discharged by wells is wasted or is probably waterlogged by artesian water used in surface irrigation the potential capacity of tho wells by closing the valves when the