WATER OF THE IRISH SEA. 



301 



I. Total solid contents. 



I. 



Water taken. 



grms. 

 ... 46-9516 



Residue 



obtained. 



1-6026 



Amount per 

 1000 grms. 



34-*i33o 



II. 



... 34-3920 



1-1704 



34*03 1 2 



Mean 34-0821 



II. Determination of Sulphuric Acid. 



Water taken, 

 grms. 



I. ... 51-213 



BaSO^ 



obtained. 

 0-3275 



SO^in 



1000 grms 



2-6347 



II. ... 57-120 



0-3242 



2-6130 



Mean 2-6239 



Equivalent to 2-1870 SO3. 



III. Determination of Chlorine. 



Water taken. 

 I. ... 51*1760 

 11. ... 51.1567 

 III. ... 51-0848 



Mixed salts 



obtained. 



3-8862 



3-8853 

 3-8790 



AgCl. 



3-8788 

 3-8780 

 3-8718 



Clin 

 1000 grms. 



187344 

 18-7376 

 18-7340 



Mean ^8-7353 



Hence we see that the proportion of solid matter con- 

 tained in the water of the Irish Sea is somewhat greater 

 in summer than in winter, the variation amounting to 

 0*0144 per cent. It is also conclusively proved that the 

 relative amount of saline constituents present in the water 

 of the Irish Channel is invariably less than that contained 

 in the water of the Atlantic Ocean lying between the same 

 parallels. 



According to Forchhammer, the mean proportion of the 

 leading constituents of the water of the Atlantic, far away 

 from the shores, is as follows : — 





CI. 



SO3. 



CaO. 



MgO. 



Total salts. 



Absolute amount | 

 per 1000 grms. J 

 Relative amount . . . 



19-865 

 100 



2-362 

 11-89 



0-588 

 2*96 



2-199 

 11-07 



35-976 

 181-10 



