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81. Elevation. Turbine for east pit

82. Experiments. Discharge of turbine

83. Experiments. Discharge of turbine

84. Experiments. Humphrey turbine

85. Experiments. Turbine

86. Experiments. Turbine

87. Experiments. Turbine

88. Experiments. Turbine

89. Experiments. Turbine

90. Graph on operation of turbine

91. Hamilton trubine, plan of wrought iron flume

92. Hamilton turbine difuser

93. Hoisting and regulating apparatus

94. Hoisting and regulating apparatus

95. Hoisting and regulating apparatus

96. Hoisting engine #2

97. Hydraulic motor

98. Hydraulic motor

99. Improvements in hydraulic motors

100. Improvements in turbines