174 



INDEX 



Central Valley (Cal.), water province, 67. 

 Chalk: 



definition of, 36. 



porosity of, 29. 

 Cistern : 



deflectors, 148. 



filters, 148. 

 Cisterns: 



advantages and disadvantages of, 143- 



145- 



combination with wells, 149. 



construction of, 147. 



description of, 143. 



location of, 147. 



size of, 145-146. 



when desirable, 143. 

 Clay: 



definition of, 36. 



ground waters in, 41, 72, 81, 161. 



pollution conditions in, 45, 81. 



porosity of, 29. 



screens used in, 115. 

 Cleavage, definition of, 39. 

 Cleavage planes, ground waters in, 43. 

 Coastal Range water province, 67. 

 Color: 



of water, 169. 



removal of, from water, 169. 

 Concretions, definition of, 37. 

 Conglomerate: 



definition of, 36. 



ground waters in, 43. 



pollution conditions in, 45. 

 Contamination, See Pollution. 

 Copper sulphate, use of, in removing algae, 



171. 

 Corrosion : 



of casings, 102, 117. 



of screens, 114. 

 Crystalline rocks: 



artesian flows from, 55. 



ground waters in, 44, 161. 

 Curbs and curbings: 



brick, 69-70. 



cement, 70. 



rock, 69-70. 



tile, 70-71. 



wood, 70, 75, 85, 95. 

 Cylinders, depth set, 121, 122, 125. 



Dams, construction of, 154. 

 Deep well pumps, use of, 120. 

 Deflectors, use of, with cisterns, 148. 

 Diamond drilling: 



cost of, 119. 



method of, 105, 107. 

 Dip: 



definition of, 39. 



relation to absorption of water, 31. 

 Divining rod: 



experiments with, 48. 



fallacy of, 48. 



Drainage, effect of, on ground water, 86. 

 Drilling methods: 



boring, 68, 90-95. 



California, 105, 107. 



calyx, 105, 107. 



diamond, 105, 107. 



driving, 68, 98-100. 



hydraulic, 105, 107. 



hydraulic rotary, 105, 107. 



jetting, 68, 103, 104. 



percussion, 105, 106. 



punching, 68, 95. 



standard, 105, 106. 



stovepipe, 105, 107. 

 Driven wells, See Wells, driven. 

 Driving, methods of, 68, 98-100. 

 Dynamite, use of, in wells, 113. 



Electricity, use of, in pumping, 129. 

 Engines, use of, for pumping, 129. 

 Evaporation, amount of, 3. 

 Explosives, use of, in wells, 113. 



Farms : 



typhoid fever on, i. 



water supplies of, I, 4. 

 Faults: 



definition of, 39. 



waters in, 83. 

 Filters: 



artificial, 148. 



natural, 99, 100, 101. 

 Filtration, natural, 44-45. 

 Flowing wells, See Artesian flows. 

 Foliation, definition of, 39. 

 Formations, definition of, 38. 

 Forests, effect of, on ground waters, 86. 



