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Geology and ground-water resources of the Two Medicine unit and adjacent areas, Blackfeet Indian Reservation, Montana, with a section on chemical quality of water
Q.F. Paulson, Tom V. Zimmerman, Russell H. Langford
1965, Open-File Report 65-117
The Two Medicine Irrigation Unit, on the Blackfeet Indian Reservation of northern Montana, is irrigated by water diverted from Two Medicine Creek. Waterlogging because of overapplication of water and locally inadequate subsurface drainage is a serious problem. This study was undertaken by the U.S. Geological Survey in cooperation with the...
Density comparison method for the measurement of isotopic variations in prepared waters
Joseph Howard McCarthy Jr., Thomas Seward Lovering, Herbert Williams Lakin
1965, Open-File Report 65-103
The falling-drop method of density determination has been modified so that the densities of a standard and a sample water are compared simultaneously. A constant temperature bath that does not vary more than 0.0001°C and an accurate double micropipet are described. The method has sufficient sensitivity and precision to distinguish...