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THE ORIGIN OF GROUND WATER Page
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accurate acid air line amount artesian Atlantic Coastal Plain bearing formation bottom brake horsepower capacity carbon centrifugal pump chlorine clay cone conservation construction contract corrosion deep well turbine deposits depth determine diameter discharge drawdown drillers drilling drilling rig driving efficiency engineers equipment feet flow formula gallons gravel treated gravel treatment ground water ground water supplies grout hard head hydraulic impeller important inches incrustation installation irrigation limestone lower material maximum means measure ment metal meter method motor obtained operation orifice particles permeability piezometer pipe porosity pounds pressure pumping level purpose quantity of water rate of pumping recharge reservoir rock rotary samples sand and gravel screen openings shaft slot opening static level surface surge test hole things tion tube U. S. Geological Survey velocity water level water table water-bearing formation Watt-Hours weir wire rope writer yield zone of saturation