278 



INDEX 



Increase of material, 18 

 Industrial dredging, 233 

 Ingersoll drilling boat, 33 

 Insurance, 259 

 Interest on capital, 258 



Jandin, M., 147 

 Jets of compressed air, 149 

 Jets of water, 97, 144 

 Junkin's ditcher, 250 



Ladder dredges, 3, 52, 60, 219 



"Cadiz," 83 



"City of Paris," 91 



" Pas-de-Calais/' 79 



"Percy Sanderson," 262 



"Ville de Rochefort," 75 

 Land dredging, 246 

 Lateral feeding hydraulic dredge, 104, 



120 



Launches, 59 



Lead line for soundings, 12 

 Lift holes, 46 

 Light on dredges, 50 

 Loam and clay, 8 

 Lobnitz rock cutter, 24 



Mayer's ditching machine, 251 

 Mann, L. M., 87 



McAlester, M. D., Maj. U. S. A., 144 

 McDerby, George C., U. S. A., 42 

 Measurement of quantities, 15 



by gaging the draft of scows, 16 



in place, 16 



by scows, 16 

 Meyer, Cornelius, xi 

 Mineral dredging, 217 

 Mud or silt, 10, 187 



Newton, Gen. John, U. S. A., 42 

 Non-propelling dredges, 61 



Ocherson, J. A., 141 

 Open-hold barges, 190 

 Operating expenses, 254 

 Operations for hydraulic survey, 12 

 Orange-peel bucket dredges, 62, 174 



Pardessus, R. M., 13 

 Pipe: 



conveyors, 100, 185 



discharging, 100 



floating, 185 



suction, 95 



Placer dredge, 220 



with revolving screens, 222 



with shaking screens, 224 



with sluice-box, 225 

 Place measurement, 16 

 Platinum dredging, 217 

 Pneumatic dredges, 4, 61, 147 

 Pontoons, 191 

 Profit of contractors, 253 

 Propelling machines, 77, 82, 84, 109, 



119, 171 



Propellers for stirring, 143 

 Power for ladder dredge, 72 

 Power required for pumps, 102 

 Pump lining, 99 

 Pump shell, 98, 119, 129 



Rackrock, 35 



Radial feeding hydraulic dredge, 104, 



125 



Rand drilling boat, 34 

 Revolving drums for stirring, 145 

 Revolving screens, 222 

 Revolving wheels for stirring, 143 

 Ridgway belt conveyor, 88 

 Robinson, A. W., 19, 64, 104 

 Rock, 6 



disintegrated, 6 



dredging, 40 

 Rock-cutter: 



Lobnitz, 24 



Scott & Godsir, 23 

 Rock excavation: 



honeycombing the reef, 43 



lift holes, 46 



single large blast, 42 

 Runner for centrifugal pump, 124 



Sand, 9, 186 



Sand and gravel dredging, 233 



Sc i-.-i pci-s, 96, 144 



