i8o 



INDEX 



\\Y1U, dug: 



protection of, 68, 88. 



safety distance of, 81. 



safety of, 77. 



size of, 85. 

 Wells, hydraulic drilled: 



advantages and disadvantages of, 107. 



conditions to which adapted, 105. 



cost of, 1 19. 



description of, 105. 

 Wells, hydraulic-rotary drilled: 



advantages and disadvantages of, 107. 



conditions to which adapted, 105. 



cost of, 119. 



description of, 105. 

 Wells, jet: 



advantages and disadvantages of, 102. 



care of, 103. 



conditions to which adapted, 68. 



cost of, 119. 



depths of, 103. 



description of, 68. 



limitations of, 73. 



location of, 102. 



sinking of, 103. 



size of, 103. 



Wells, percussion drilled, See Wells, stand- 

 ard drilled. 



Wells, punched: 



advantages and disadvantages of, 89. 



cleaning of, 95. 



conditions to which adapted, 68. 



cost of, 119. 



depth of, 95. 



description of, 68. 



limitation of, 73. 



location of, 90. 



pollution of, 90. 



protection of, 90. 



sinking of, 95. 

 Wells, standard drilled: 



advantages and disadvantages of, 106. 



conditions to which adapted, 105. 



cost of, 119. 



description of, 105. 

 Windmills, use of, 129. 

 Wood curbings: 



use of in cisterns, 148. 



use of in wells, 70, 75, 85, 95, 117. 



Yield of springs, 13, 17. 

 Yield of wells: 



methods of increasing, 113. 



relation to type, 71. 



variations of, 133, 138. 



UNIVERSITY OF 



DEPARTMENT OF CIVIL ENGINEERING 



Municipal and Structural 



