292 



On the Sallncss of the Allantk Ocean. 



and contiimally agitating it while u|)on the fire, with the neck iii- 

 chned at an an^le of abuiit 45". The residue gives exactly the 

 weight of the sa'ine matters. It is easy to estimate the quantity 

 of iiydrochloric acid proceeding from the decomposition of a part 

 of the hydrochlorate of magnesia contained in the sea-water, by 

 collecting the magnesia which remains, when the residue after 

 the evaporation is dissolved in water; since the relation in which 

 these tv\o bodies enter into coml)inati{;n is well known. The 

 c|uantity of magnesia furnished 1)V each residue beinc; too small 

 to be estiiiiated witli precision, all the residues were collected into 

 one; and after separating t!ie magnesia from the whole mass, it 

 was divided proportionally to the weight of each residue. yVs it is 

 very probable that this base exists in sea-water in the state of chlo- 

 rate of magnesia, the weight of each residue was corrected by sub- 

 tracting from it that of the oxygen contained in the magnesia ob- 

 tained, and adding to it the weight of chlorate saturated by the 

 corresponding quantity of magnesia. The results have been col- 

 lected in the following table. The water which is designed by 

 Calais in the column of latitudes was taken up by myself in the 

 midst of the channel between Dover and Calais. The saline re- 

 sidues proceed from 100 parts of sea-water. 



Density. 



1-0278 

 1-02.90 

 10294 



1-0288 

 1-0272 

 i-0278 

 10275. 

 1-0283 

 1-02S9 

 1-0286 

 10294 

 1-0284 

 1-0291 

 1 0297 

 1-0293 



1-0286 



Saline Residue 



3-48 

 3-67 

 3-63 

 3-66 

 3-75 

 3-48 

 3-77 

 3-57 

 3-67 

 3-68 

 3-70 

 3-76 

 3-57 

 3-71 

 3-75 

 3 61 



3-6; 



The densitic:, in spite of every care being taken, differed fre- 

 quently, I'.nd in an jrrt^gular manner, from each other. The 



quantity 



