PLATE Vin. 



■pig. l._The Ion- narrow ueck or ' liaulover ' of Uön-muu (^ P^), wliich 

 once protected the naval port of U-su-yöug on the h^nd side. A 

 stone-gate supporting a guard tower is in the village. The ground 

 is brecciated felsophyre (p. 59). A quarter of an hour is sufficient 

 to reach the naval port. 



Pig. 2.— U-su-yöng (^ 7K ^) i« at the western entrance of the far-famed 

 whirlpool (PI. VII. fig. 3), and was the naval base of the Korean 

 Admiral I-suu-sin (^#g) Avho annihilated the Japanese armada 

 during the war of 159-2-159S by luring oiu- armed junks into the 

 fatal whirlpool. See page 59. 



Fig. 3.— The narrowest part of the whirlpool, called 3Iyöng-yang-jin, the 

 other side being the island of Chiu-do. The ferry across the 

 clianuel is only 1 km. Here the currant is like a rapid river, and 

 the agitated water rushes over a rough bottom of volcanic rock 

 at the rate of 7 knots an hour, surging like rapids and roaring 

 like a storm ; hence the name 3Iyöng-yaug or ' roaring sea.' The 

 rock is grayish brecciated felsophyre with green flecks, and abimdaut 

 bipyramids and corroded crystals of quartz which pi-oject like 

 needle-heads on the wave-beaten surface at the water's edge on 

 both sides of the ferry. Here again we have the Upper Kyöng- 

 sang formation (p. (U). 



