102 



Mr. W. W. Rouse Ball 



[March 12, 



Release index fingers and pindiki.* 



This represents the lii^h tide which covers the reef. 



# 

 Release thumbs and pass them proximal to the little-finger loops and 



into the index loops from the proximal side, turn them down 



away from you and up towards you, thus picking up the ulnar 



index strings. Release index fingers. 

 Pick up the radial little-finger strings with the thumbs, proximally 



and pindiki. # 



This represents two large blocks of coral exposed by the falling 

 tide. 



Fig. 17.— The Tide. 



Repeat # #, and more of the reef appears. 

 you please until all the reef is exposed. 



Repeat as often as 



Release index fingers. Take the two left radial thumb strings in 

 the mouth and release the left hand. Place the left little finger 

 and thumb tip-to- tip with those of the right hand, and slip the 

 loops on to them. Take the mouth strings between the left 

 thumb and index, and turning them over place them on the 

 right thumb and little finger in the opposite direction to that in 

 which they were on the left hand, but making sure that the 

 ulnar little-finger string runs straight across. 



Pindiki and the low tide shows all the reef still exposed. 



Repeat ^ #, and the rising tide will gradually submerge the reef 

 until it is all covered again. 



* This is a native name for the "Caroline Island Extension." Pass the 

 index fingers proximal to the ulnar thumb string and bring them up through 

 the thumb loop so that this string makes a half-turn round their tips. Keep- 

 ing the thumbs closely pressed against the index fingers to hold their ulnar 

 strings in place, extend the figure by turning the palms away from you. 



