512 



VAST AMOUNT OF SUBSIDENCE 



CHAP. XX 



there subsided, and in each atoll a monument over an island 

 now lost. We may thus, like unto a geologist who had lived 

 his ten thousand years and kept a record of the passing 

 changes, gain some insight into the great system by which 

 the surface of this globe has been broken up, and land and 

 water interchanged. 



BIRGOS LATRO, KEELING ISLAND. 



