\iii CONTENTS. 



ABT. 



79. Time of Emptying any Vessel ............................ 142 



80. Time of Emptying a Cylinder into a Vacuum .............. 144 



81. Time of Emptying u Paraboloid ........................... 145 



82. Cylindrical Vessel with Two Small Orifices ................ 145 



83. Orifice in the Side of a Conical Vessel ..................... 146 



84. Velocity of Efflux through an Orifice in the Bottom ......... 147 



85. Rectangular Orifice in the Side of a Vessel ................. 149 



86. Triangular Orifice in the Side of a Vessel .................. 151 



87. Time of Emptying any Vessel through a Vertical Orifice. . . . 156 



88. Efflux from a Vessel in Motion ........................... 158 



89. Efflux from a Rotating Vessel ............................ 160 



90. The Clepsydra, or Water-Clock ........................... 161 



91. The Vena Contracta ..................................... 162 



92. Coefficient of Contraction ................................ 163 



93. Coefficient of Velocity ................................... 164 



94. Coefficient of Efflux ..................................... 164 



95. Efflux through Short Tubes, or Ajutages .................. 165 



96. Coefficient of Resistance ................................. 167 



97. Resistance and Pressure of Fluids ......................... 170 



li*. Work and Pressure of a Stream of Water ................. 172 



!)9. Impact against any Surface of Revolution .................. 174 



100. Oblique Impact ......................................... 178 



101. Maximum Work done by the Impulse ..................... 180 



Examples .............................................. 181 



CHAPTER II. 



MOTION OF WATER IN PIPES AND OPEN CHANNELS. 



102. Resistance of Friction 185 



103. Motion of Water in Pipes 186 



104. Uniform Pipe connecting Two Reservoirs 188 



lo~. ( 'oefficient of Friction for Pipes 191 



106. The Quantity Discharged from Pipes 194 



107. The Diameter of Pipes 197 



108. Sudden Enlargement of Section 199 



109. Sadden Contraction of Section 201 



1 Ml KlbowH. 204 



1 1 1 a-ndH 206 



111.* Equivalent Pipes 207 



111/' Discharge Diminishing Uniformly 208 



