INDEX 



179 



Well augers, 90-95. 

 Well waters: 



composition of, 160-164. 



sanitary tests of, 165-167. 



suspicious, 163. 

 Wells- 

 barometer, 134. 



blowing, 134, 138. 



breathing, 134, 137. 



capacity of, relation of to diameter, 



73- 



casing of, 115. 

 'cost of, 74, 1 1 8, 119. 

 depths of, 73. 

 effect of barometric pressure on, 137- 



139- 



effect of weather on, 137. 

 explosives used in, 113. 

 flowing, requisites for, 54. 

 fluctuations of head in, 133, 138. 

 freezing of, 135-142. 

 packing of, 116. 

 peculiarities of, 133-142. 

 plugging of, 1 1 6. 

 pollution of, 75, 164. 

 protection of, 75. 

 roiliness of water in, 134, 138. 

 sucking, 135. 



safety of different types, 74. 

 supplies from, 152. 

 types of deep, 69. 

 types of, relation to depth, 73. 

 types of, selection, 71. 

 types of shallow, 68. 

 "weather," 134. 



yield of, methods of increasing, 113. 

 yield of, relation to type, 71. 

 yield of, variations, 133, 138. 

 Wells, bored: 



advantages and disadvantages of, 89-90. 



cleaning of, 95. 



conditions to which adapted, 68. 



cost of, 119. 



depth of, 95. 



description of, 68. 



limitations of, 73. 



location of, 90. 



protection of, 90. 



sinking of, 90. 



Wells, California type: 



advantages and disadvantages of, 107. 



conditions to which adapted, 105. 



depths of, 74. 



description of, 105. 

 Wells, calyx drilled : 



advantages and disadvantages of, 107. 



conditions to which adapted, 105. 



description, 105. 

 Wells, deep: 



advantages and disadvantages of, 106. 



casing of, 111-112. 



location of, 108. 



pollution of, III-H2. 



protection of, I IO. 



types of, 105. 

 Wells, diamond ^drilled: 



advantages and disadvantages, 107. 



conditions to which adapted, 105. 



cost of, 119. 



depths of, 74. 



description of, 105. 

 Wells, driven: 



advantages and disadvantages of, 97. 



cleaning of, 101. 



conditions to which adapted, 68. 



cost of, 119. 



depths of, 41, 98, 100. 

 extent of use of, 97. 

 limitations of, 73. 

 locations of, 98. 

 natural niters around, 98-100. 

 pollution of, 98. 

 screening of, 100. 

 sinking of, 98. 

 Wells, dug: 



advantages and disadvantages of, 76. 

 caving of, 85. 

 cleaning of, 78, 88. 

 conditions to which adapted, 68. 

 construction of, 84. 

 cost of, 119. 

 curbing of, 84. 

 depths of, 85. 

 description of, 68. 

 gas in, 88. 

 limitations of, 73. 

 location of, 76, 81-83. 

 pollution of, 77-83, 86-88. 



