ANNOTATIONS AND ADDITIONS. 233 



ANNOTATIONS AND ADDITIONS. 



( J ) p. 209. "Across the peaceful ocean arm, which fills 

 the wide valley between the American shore and 

 Western Africa? 



The Atlantic Ocean, from the 23d degree of South to the 

 70th degree of North latitude, has the form of an excavated 

 longitudinal valley, in which the salient and re-entering angles 

 are opposite to each other. I first developed this idea in 

 my "Essai d'uii Tableau geologique de rAmerique meri- 

 dionale," printed in the Journal de Physique, T. liii. p. 61. 

 (Geognostische Skizze von Siidamerika, in Gilbert's Annalen 

 der Physik, Bd. xvi. 1804, S. 394-449.) From the Canaries, 

 and especially from the 21st degree of North latitude and the 

 23d degree of West longitude, to the North-East coast of 

 South America, the surface of the sea is usually so calm, 

 and the waves so gentle, that an open boat might navigate 

 in safety. 



( 2 ) p. 209. " A wonderful, outbreak of fresh springs in 

 the middle of the ocean" 



On the southern coast of the island of Cuba, south-west of 

 the Port of Batabano in the gulf of Xagua, a few miles 

 from the coast, springs of fresh water gush from the bed of 

 the ocean probably under the influence of hydrostatic pres- 



