THE PROPERTIES OF SEA-WATER 69 



Atlantic. Expressing the salts as percentages, we get the 

 following table : 



SKA-YYATKR: PERCENTAGE OF TOTAL SALTS. 



There are certain obvious differences in the results of these 

 analyses, which differences are to some extent due to the 

 method of expressing the results. 



According to both Forchhammer and Dittmar, the relation 

 in which the several salts stand to one another is constant. 

 Both analysts determined the quantity of lime (CaO), mag- 

 nesia (MgO), potash (K 2 O), and sulphuric acid (SO 3 ) present 

 with 100 parts of chlorine, including bromine, while Dittmar 

 also estimated for soda (Na 2 O) and carbon dioxide (CO 2 ). If 

 the analyses are expressed thus, the above differences are no 

 longer so appreciable. The following table gives Dittmar's 

 and Forchhammer's analyses, together with some made by 

 Schmelck on North Sea water : 



Although samples of sea-water are never absolutely alike, 

 there is, nevertheless, from all parts of the world a remarkable 



