INTO THE DEPTHS 



was a mere ''pin-prick" of exploration, so minute that it 

 examined only a square mile or so at most of the 

 141 milHon square miles of the world's sea-beds. Yet 

 even so limited an exploration can convince us that the 

 sea is truly overwhelming — physically, because it covers 

 seven- tenths of the earth, and mentally as we ghmpse the 

 wonderment and mystery concealed in its deeps, reflected 

 from its surface, and expressed in the milhons of living 

 creatures which inhabit its shores. 



19 



