818 THE BOTTOM OF THE SEA. 



During a gi'^at eartliquake which, in 1757, de 

 stroyed one-seventh (1500 persons) of the population 

 of the ishxnd of St. George, eighteen islets sud- 

 denly appeared about 600 yards from the shore. 

 Th(-ir fate was similar to that of Sabrina. 



4. Submarine Volcano in the Middle of the Atlantic. 



One of the most remarkable of submarine vol- 

 canoes exists in the mildle of the Atlantic Ocean. 

 M. Daussy had already pointed out a region, situated 

 about 24° 42' W. longitude and 0° 50' S. latitude, as 

 interesting on account of volcanic phenomena. We 

 reproduce a list gi\en by M. Y^zian of incidents 

 observed on this spot, since the midUe of the last 

 century, by a large numbf r of sailors : — 



1747. The ship Prince, b .imd for tl.e Indies ; two shocks, as 

 though the vessel had touch( d giound. 



1754. The ship Silhouette; extiaoidiuary shock. 



1758. Le Fidele ; shock. 



1761. Le Vaillant ; an island of sand observed. 



1771. The frigate Fac/'fique; very violent shock, sea much agi- 

 tated. 



1800. M. de Krusenstern saw a volume of smoke rising, twice 

 repeated, to a gr^ at height. 



1816. The Triton; a rock ti.ree miles long and one mile wide. 26 

 fathoms of water ; bottom, brown tand. 



1831. L'Aigle; calm sea, shock, rumbling sound bene..th the 

 water. 



1832. La Seine ; shock,. 



IhSo. la Couronne ; sciaped the bottom with her keel; sounded 

 afterward , 3.t fathojus. 



