2(>2 Changes of Level in the Pacific Ocean. 



FEET. 



Carolines, ......... None ascertained. 



Ladrones, .... Guam, ..... 600 



Rota, 600 



Feis, 90 



Pelews, 0? 



New Hebrides, New Caledonia, Salomon Islands, . None ascertained. 



Several deductions are at once obvious : — 



1. That the elevations have taken place in all parts of the 

 ocean. 



2. That they have in some instances affected single islands, 

 and not those adjoining. 



3. That the amount is often very unequal in adjacent 

 islands. 



4. That in a few instances the change has been experienced 

 by a whole group or chain of islands. The Tarawan Group 

 is an instance, and the rise appears to increase from the 

 southernmost island to Apia, and then to diminish again to 

 the other extremity. 



The Feejees may be an example of a rise at the west side 

 of a group, and possibly a subsidence on the east ; while a 

 little farther east, the Tonga Islands constitute another ex- 

 tended area of elevation. We observe that while the Sa- 

 moan Islands afford no evidences of elevation, the Tonga 

 Islands on the south have been raised, and also the Fakaafo 

 Group, and others on the north. 



We cannot, therefore, distinguish any evidence that a 

 general rise is or has been in progress ; yet some large areas 

 appear to have been simultaneously affected, although the 

 action has often been isolated. Metia and Elizabeth Island 

 may have risen abruptly ; but the changes of level in the 

 Feejees and the Friendly Islands appear to have taken place 

 by a gradual action. 



