CONTENTS. 



PART I. 

 THE PHYSICAL GEOGKAPHY OF THE SEA. 



CHAPTER I. 



THE MAGNITUDE OF THE SEA. 



Extent of the Ocean. — Length of its Coast-Line. — Mural, Rocky, and Flat Coasts. 

 — How deep is the Sea ? — Average Depth of the Atlantic Ocean. — The Tele- 

 graphic Plateau between Newfoundland and Ireland. — Measurement of Depth 

 by the Rapidity of the Tide-Wave. — Progressive Changes in the Limits of the 

 Ocean. — Alluvial Deposits. — Upheaving. — Subsidence. — Does the Level of the 

 Sea remain unchanged, and is it everywhere the same ? — Composition and 

 Temperature of Sea- Water. — Its intrinsic Colour. — The Azure Grotto at Capri. 

 — Modification of Colour owing to Animals and Plants. — Submarine Landscapes 

 viewed through the Clear Waters ..... Page 3 



CHAPTER II. 



THE WAVES OF THE OCEAN 



Waves and the Mode of their Formation. — Height and Velocity of Storm- Waves, 

 on the High Seas, according to the Calculations of Seoresby, Arago, Sir James 

 Ross, and Wilkes. — Their Height and Power on Coasts. — Their Destructive 

 Effects along the British Shore. — Dunwieh. — Reculver. — Shakspeare's Cliff, 24 



CHAPTER III. 



THE TIDES. 



Description of the Phenomenon. — Devastation of Storm-Floods on Flat Coasts. — 

 What did the Ancients know of the Tides ? — Their Fundamental Causes revealed 

 by Kepler and Newton. — Development of their Theory by La Place, Euler, and 

 Whewell. — Vortices caused by the Tides. — The Maelstrom. — Charybdis. — The 

 Barre at the mouth of the Seine. — The Euripus . . . .32 



