08 An Analijsis of Sea- water ; 



of the carbonate as were necessarv to preserve an excess of am- 

 monia in the I'uiuor, were added, as long as anv precipitation 

 was produced. The precipitate was converted, by calcination 

 for an hour at a red-heat, into phosphate of magnesia. This 

 \veii=;hcd 37 grains, ccjuivalent to 14"& grains of inaQiiesia. 



Tlie clear liquor was cvapora cd to dryness, and the drv mass 

 was exi)Osed to a lieat gradually raised to redness, to expel the 

 muriate of annnonia formed in the preceding operations. Mu- 

 riate of soda remained, which weighed ISO'5 grains, equivalent 

 to i'6'3 of soda, and b4-2 of muriatic acid. 



This gives the quantity of soda contained in the sea-water ; 

 iiut it does not necessarily give the quantity of miniatic acid; 

 fjr if more of this acid be present than what the soda can neu- 

 tralize, combined with portions of anv of the other bases, (and 

 from the former analysis this appears to be the case,) this (juan- 

 titv will l)e combined with ammonia in the jjreceding ^teps of 

 the analysis, and is of course dissipated in the sta*te of muriate of 

 ammonia. 



This will appear, and the quantity be discovered by ascertain- 

 if.g- what proportion of these bases the quantity of sulphuric acid 

 obtained bv the analysis is capable of neutralizing, thus tinding 

 if anv excess of them remain ; and, from the (piantity of this dis- 

 covering the quantity of muriatic acid, which would be requisite 

 for saturation, which of course is the (juantity lost. 2-[) of lime,, 

 the quantity of this earth obtained by the analysis, neutralize A'\ 

 of sulphuric acid ; this deducted from i'l*4, the quantity obtained, 

 leaves 10 3, to neutralize which, 5*1 of magnesia are required; 

 this deducted from 14'6, the (juantitv of magnesia, leaves 9'7 Qf 

 that earth; to neutralize this, 13-5 of muriatic acid are re- 

 «piired ; and this added to the 84*2 in the muriate of soda, gives 

 97*7 grains as the total quantity of muriatic acid. 



The elements, then, of the salts, in a pint of sea-water, are, 

 l)V this analysis. 



Lime, . . . . 2-9 grains. 



Magnesia, .. .. 14'8 



Soda, 96-3 



Sulphuric acid, . . 14*4 



Muriatic acid, . . .. 97*7 



226-1 

 The proportions of the compound salts may be assigned from 

 these, according to whatever view may appear most probable, of 

 the state of combiiiation in which they exist in sea- water, and 

 thus the results may be compared with those of the former ana- 

 lyses. 



Thus, supposing the elements to be combined in t!ie modes in 



whicli 



