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Page 2704, results 67576 - 67600

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Publication Extents

Not all publications have extents, not all extents are completely accurate
The significance and nature of the cone of depression in ground-water bodies
Charles V. Theis
1938, Economic Geology (33) 889-902
In nature the hydraulic system in an aquifer is in balance; the discharge is equal to the recharge and the water table or other piezometric surface is more or less fixed in position. Discharge by wells is a new discharge superimposed on the previous system. Before a new equilibrium can...
Sulphate minerals of the Comstock Lode, Nevada
C. Milton, W. D. Johnston Jr.
1938, Economic Geology (33) 749-771
Seventeen representative samples of supergene sulphates from old workings on the Comstock Lode are described. They range from simple minerals such as gypsum and epsomite to complex aggregates of four or more distinct species. All are well known species except a mineral of the copper (chalcanthite) or magnesium sulphate pentahydrate...
A recording evaporimeter
J. Oliver, N.W. Cummings
1938, Eos, Transactions, American Geophysical Union (19) 609-612
The instrument herein described was originally designed and built to record the evaporation‐loss from a standard Weather Bureau pan for use in a study of the variation of flow in Santa Ana River. Valuable suggestions were made by various members of the Water Resources Branch of the Geological Survey in...
Ground‐water for air‐conditioning on Long Island, New York
R.M. Leggette, M.L. Brashears Jr.
1938, Eos, Transactions, American Geophysical Union (19) 412-418
During the last five years ground‐water has been more and more extensively used for air‐conditioning on Long Island, New York. The wide‐spread occurrence of highly permeable water‐bearing material and the relatively small cost of installation and operation of a ground‐water, air‐conditioning system has resulted in many such installations by theaters,...