INDEX 



277 



Efficiency: 



of rockcutters, 23, 27 

 pumps, 101 



Electric dredges, 227 



Elevator, double-ladder floating, 201 



floating, 200 

 Elevator on land, 198 

 Employment of dredges, 2 

 Endless chain, 70 

 Engines: 



for dipper dredges, 156, 162 



for grab dredges, 179 



hydraulic dredge, 114, 124, 128 



ladder dredge, 78, 82, 88, 92 



for spuds, 166 



of universal dredges, 134, 138 

 English grab dredges, 169 

 Expenses : 



annual, 258 



general, 259 



running, 254 

 Exploding batteries, 35 

 Explosives, 45, 48 

 Estimating dredged materials, 16 



Fairbanks' walking dredge, 249 

 Filling: 



for extending Governor's Island, N. 

 Y., 243 



for improving Long Beach, L. I., 243 



marsh lands, 240 



tide water lands at Seattle, 241 

 Floating clough, 141 

 Floating elevator, 200 



with double ladder, 201 

 Flood rock, Hell Gate, N. Y., 42 

 Flow of debris through pipes, 71, 186 

 Forward feeding hydraulic dredge, 104, 



123 

 Friction in pipes, 102 



Gaging the draft of scows, 16 

 Gold dredging, 218 

 Grab bucket: 



for clay, 173 



for gravel and boulder, 173 



for mud and silt, 173 



Grab bucket: 



for unloading barges, 202 

 Grab dredges: 



American, 168 



double-line attachment, 176 



English, 169 



single-chain attachment, 175 



South American, 172 

 Graduated rods for soundings, 12 

 Grapple dredges, 62, 173 

 Gravel, 7 



dredging, 236 



Hammering rocks, 22 

 Handling of debris, 54 



sand, 237 

 Hardpan, 8 



Harrow and scrapers, 141 

 High-tower ladder dredges, 89 

 Honeycombing the reef, 43 

 Hopper dredge : 



"City of Rouen," 116 



"Montevideo," 137 



"Pas-de-Calais," 79 



" Percy Sanderson," 262 



"Thomas," 114 

 Hopper for debris, 81, 106 

 Hopper steamer, 195 

 Hull of dredges, 68, 77, 85, 117, 126, 



134, 151, 165, 179 

 Hydraulic dredges, 4, 51, 94, 234 



"Atlantic" and "Manhattan," 67, 

 263 



forward feeding, 104, 123 



lateral feeding, 104, 120 



radial feeding, 104, 125 



sea-going, 110 



"City of Rouen," 116 



"Delta," 123 



"Galveston," 67, 210 



" J. Israel Tarte," 67, 120, 208 



"King Edward VII," 125 



"Leviathan," 67 



"Nereus," 107 



"Thomas," 114 

 Hydraulic jets, 97 

 Hydraulic survey, 14 

 Hydro-penumatic dredges, 148 



