im 



REMARKS 



ON THE PRECEDING OBSERVATIONS ON THE 



SPECIFIC GRAVITY OF THE SEA WATER 



IN DIFFERENT LATITUDES, 



A XI) 



ON THE TEMPERATURE OF THE OCEAN AT 

 DIFFERENT DEPTHS. 



BY J. C. HORNER. 



'1 HE observations on the specific gravity of the 

 sea water have been aheady drawn up in an instruc- 

 tive table (page 403.) by the able naturahst of the 

 expedition, and arranged according to the degrees 

 of hititude. This table evidently shows the fact, 

 which is also proved by the experiments on Kru- 

 senstern*s voyage, that the sea on the surface, be- 

 tween the tropics, is specifically heavier, that it 

 contains more salt, than in higher latitudes. If we 

 take together the statements from 25th degree 

 soiitli, as far as 25th degree north latitude j and, in 

 the same manner, from 50° to 65° degree of north 

 latitude, the mean of the first is, 1.0288, that of 

 the latter 1.021-5, which gives the difference of 

 0.0013 or .T^, But tliis by no means proves an 



