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Page 6398, results 159926 - 159950

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Isotopic analysis of uranium in natural waters by alpha spectrometry
K.W. Edwards
1968, Water Supply Paper 1696-F
A method is described for the determination of U234/U238 activity ratios for uranium present in natural waters. The uranium is coprecipitated from solution with aluminum phosphate, extracted into ethyl acetate, further purified by ion exchange, and finally electroplated on a titanium disc for counting. The individual isotopes are determined by...
Frequency curves
H. C. Riggs
1968, Techniques of Water-Resources Investigations 04-A2
This manual describes graphical and mathematical procedures for preparing frequency curves from samples of hydrologic data. It also discusses the theory of frequency curves, compares advantages of graphical and mathematical fitting, suggests methods of describing graphically defined frequency curves analytically, and emphasizes the correct interpretations of a frequency curve....
Estimated use of water in the United States, 1965
Charles Murray
1968, Circular 556
Estimates of water use in the United States for 1965 indicate that an average of about 310 bgd (billion gallons per day) were withdrawn for public-supply, rural domestic and livestock, irrigation, and industrial (including thermoelectric power)uses--that is, about 1,600 gallons per capita per day. This represents an increase of 15...
Methods of measuring water levels in deep wells
M. S. Garber, F. C. Koopman
1968, Techniques of Water-Resources Investigations 08-A1
Accurate measurement of water levels deeper than 1,000 feet in wells requires specialized equipment. Corrections for stretch and thermal expansion of measuring tapes must be considered, and other measuring devices must be calibrated periodically. Bore-hole deviation corrections also must be made. Devices for recording fluctuation of fluid level usually require...