276 



Deck barges, 192 

 Deck scows, 191 

 Delays in dredging, 256 

 Diamond dredging, 217 

 Dipper, 155 



Dipper dredges, 4, 61, 150 

 output of, 157 

 "Alpha," 158 

 "Chicago," 151-158 

 "Frontenac," 158 

 "Independent," 161 

 "Majestic," 164 

 Dipper handle, 155 

 Disintegrated rock, 6 

 Ditcher: 



Junkin's, 250 

 Mayer's, 251 

 Stephen's, 248 

 Double-chain attachment for grab 



bucket, 176 



Double-ladder floating elevator, 201 

 Drag, 207 



Drainage excavator, 247 

 Dredge : 



"Alpha," 158 



"Baldwin," 207-213 



"Cadiz," 83 



"Caffrey," 142 



"Champion," 181 



"Chicago," 151-158 



"City of Paris," 91 



"City of Rouen," 116 



"Delta," 123 



"Essayon," 144 



" Finn MacCool," 178 



"Francis T. Simmons," 67 



"Frontenac," 158 



"Galveston," 67, 210 



"Hunter," 228 



"Independent," 161 



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



"King Henry VII," 125 



"Lady Aberdeen, " 208 



"Lady Minto," 213 



"La Fontaine," 207, 213 



"Laurier," 207, 213 



"Laval," 21:; 



Dredge: 



"Leviathan," 67 

 "Majestic," 164 

 "Marne," 84 

 "McAlester," 144 

 "Montana," 142 

 "Montevideo," 137 

 "Nereus," 107 

 "Pas-de-Calias," 79 

 "Percy Sanderson," 262 

 "St. Petersburg," 133 

 "Thomas," 114 

 " Ville de Rochefort," 75 

 Dredges : 



"Atlantic "and "Manhattan," 67, 263 

 clamshell, 62, 173, 1 7s 

 dipper, 4, 61, 150 

 electric, 227 

 grapple, 62, 173 

 high-tower ladder, S9 

 hydraulic, 4, 51, 94, 234 

 ladder, 3, 52, 60, 219 

 non-propelling, 61 

 orange-peel bucket, 62, 174 

 pneumatic, 4, 61, 147 

 sea-going, 63, 74 

 self-propelling, 61, 85 

 semi-sea-going, 83 

 stirring, 4, 61, 140 

 universal, 132 

 Dredging for: 

 diamond, 217 

 filling low lands, 240 

 gold, 218 



industrial purposes, 233 

 metals, 217 

 platinum, 217 

 sand and gravel, 233 

 tin, 217 

 Dredgmen, 56 

 Drilling boat : 

 "Ingersoll," 33 

 "Rand," 34 

 used at Iron Gates, 32 

 at Xew York, 31 

 on the Rhine River. 35 

 Dumping scows, l'.2 

 with sliding platform, 196 



