xvi Introduction 



of periodic phenomena). The contents of this book are therefore concerned only with 

 general geography, chemistry, physics and the dynamics of the sea. However, outside 

 the scope of this book lies marine biology which is concerned with the organic life 

 of the oceans (plankton and fishes) which reacts not only to the external environment 

 but also to stimuli and incentives of non-physical origin. 



