CONTENTS 



LIST OF ILLUSTRATIONS ix 



INTRODUCTION. A HISTORY OF DREDGES AND DREDGING xi 



CHAPTER I 



DREDGING AND DREDGES. . 1 



CHAPTER II 



SOILS AND THEIR CHARACTERISTICS 6 



CHAPTER III 

 SOUNDINGS AND HYDRAULIC SURVEYS 12 



CHAPTER IV 



EXCAVATION OF SUBAQUEOUS ROCKS. GENERAL DISCUSSION. EXCAVA- 

 TION BY HAMMERING 21 



CHAPTER V 



EXCAVATION OF SUBAQUEOUS ROCKS Continued. BY BLASTING. COM- 

 PARISON OF THE Two METHODS 29 



CHAPTER VI 

 EXCAVATION OF SUBAQUEOUS ROCKS Continued, BY A LARGE BLAST. ... 42 



CHAPTER VII 

 HINTS ON SELECTING DREDGES FOR VARIOUS WORK 50 



CHAPTER VIII 

 DREDGING CREWS, THEIR QUARTERS, AND TENDERS FOR DREDGES 56 



CHAPTER IX 

 CLASSIFICATION AND CAPACITIES OF DREDGES. . 



