i84 THE OCEAN 



riches and when such a craft is constructed 

 man will indeed have conquered the depths 

 of the sea. But even now submarines are 

 really marvellous. They have navigated for 

 hours beneath the surface, they have dived 

 to over one hundred feet and have remained 

 upon the bottom for an entire day and have 

 risen again to the surface with their crews safe 

 and uninjured. They have penetrated the 

 ports of enemies and have destroyed huge war- 

 ships and have escaped in safety and have 

 swept swiftly beneath powerful explosive 

 mines, torpedoed hostile ships and returned to 

 their waiting friends after being under water 

 for many hours. 



Until the great European war no one real- 

 ised the possibilities of submarines, but now 

 that warfare has demonstrated their power, 

 value and efficiency, much greater attention 

 will be devoted to them. In the future sub- 

 marines may prove as valuable in peace as in 

 war, and sooner or later the "Nautilus" may 

 become a thing of reality instead of fiction and 

 the time may yet come when great passenger 

 ships will cross and recross the oceans beneath 



