vi CONTENTS 



CHAPTER X 



PAGE 



LADDER OR ELEVATOR DREDGE. GENERAL DISCUSSION 68 



CHAPTER XI 

 SEA-GOING LADDER DREDGES 74 



CHAPTER XII 

 SEMI-SEA-GOING STATIONARY AND HIGH-TOWER LADDER DREDGES 83 



CHAPTER XIII 

 HYDRAULIC DREDGES. GENERAL DISCUSSION 94 



CHAPTER XIV 

 SEA-GOING HYDRAULIC DREDGES 105 



CHAPTER XV 

 HYDRAULIC DREDGES FOR CHANNELS AND RIVER IMPROVEMENTS 120 



CHAPTER XVI 

 UNIVERSAL DREDGES 132 



CHAPTER XVII 

 STIRRING DREDGES 140 



CHAPTER XVIII 

 PNEUMATIC DREDGES 147 



CHAPTER XIX 

 DIPPER DREDGES. GENERAL DISCUSSION 151 



CHAPTER XX 

 DIPPER DREDGES Continued 161 



CHAPTER XXI 

 GRAB DREDGES 168 



CHAPTER XXII 

 DESCRIPTION OP CLAMSHELL DREDGES. . . 178 



