1820.] Philosophical Transactions for 1819, Part 11. 443 



In these experiments the residue obtained from the water by 

 evaporation was dried in the temperature of boihng Avater till it 

 entirely ceased to lose weight. 1 he muriate of silver was heated 

 to incipient fusion ; the sulphate of barytes and the oxalate of 

 lime were dried at the temperature of boiling water ; and the 

 ammoniaco-phosphate of magnesia was heated to redness. 



From the weights of the precipitates given in the table, it is 

 easy to calculate the quantity of muriatic acid, sulphuric acid, 

 lime, and magnesia, contained in the water. From these weights, 

 together with the whole weight of salts contained in the water, 

 it is easy to infer the weight of soda. Thus, for example, the 

 quantity of these bodies contained in 500 grs. of the specimen 

 of sea water marked 27 was as follows : 



Muriatic acid 8"00 grs. 



Sulphuric acid 1*27 



Lime 0-314 



Magnesia 1*08 



Soda 8-11 



These constituents we may suppose to have been combined in 

 tlie following order : 



Muriate of soda 13-300 



Sulphate of soda 2-330 



Muriate of lime 0-616 



Muriate of magnesia 2-577 



18-823 



