ANNOTATIONS AND ADDITIONS. 233 



ANNOTATIONS AND ADDITIONS. 



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

 the wide valley between tlie American shore and 

 Western Africa.' 3 



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 FAmerique 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, 

 ani 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 oczan" 



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- 



