VARIETY IN TIDES — MARMER 



191 



conditions are such as to restrict the response to the kmar tide-pro- 

 ducing forces but not the response to the solar tide-producing forces, 

 the latter become the more prominent and give rise to solar tides. 



An interesting form of tide is found at Jolo, in the Sulu Archi- 

 pelago, P, I. Here the high waters follow the moon but the low 

 waters appear to follow the sun. The tide curves for the week be- 

 ginning September 10, 1925, at Jolo are shown in figure 7. The tide 



Figure 7. — Tide curves, Jolo, Sept. 10-16, 1925. 



here is complicated by the fact that for part of the month there are 

 two high and two low waters in a day, while at other times there is 

 but one high and one low water. It is seen, however, that the high 

 waters exhibit the distinct shift to the right characteristic of lunar 

 tides, while the low waters lie almost perpendicularly under each 

 other. 



Because of the profound influence of the hydrographic features 

 of a body of water on the movement of the waters in response to 

 the tide-producing forces, various other peculiarities of the tide are 

 found at different places. But the varieties discussed above consti- 

 tute the more important and most generally found varieties of the 

 tide. 



