of sea waters, in different parts of the ocean,&c. ig$ 
Muriate of soda, 
Muriate of magnesia, 
Muriate of lime, 
Sulphate of soda. 
Still however, it must be admitted that a degree of doubt 
remains respecting the mode in which the sulphuric acid is 
combined, and that we can only pronounce with certainty 
upon the proportions of acid and base taken singly, as I have 
explained above. My experiments, therefore, were confined 
to the following points.* 
ist. To ascertain the quantity of saline matter contained 
in a known weight of the water under examination, desiccated 
in a uniform and w 7 ell defined mode ; and to compare it with 
the specific gravity of the water. 
2ndly. To precipitate the muriatic acid from a known 
weight of the w’ater, by nitrate of silver. 
3dly. To precipitate the sulphuric acid by nitrate of 
barytes, from another similar r portion of water. 
4thly. To precipitate the lime from another portion of 
water, by oxalate of ammonia. 
5thly. To precipitate the magnesia from the clear liquor 
remaining after the separation of the lime, which is best 
effected by phosphate of ammonia, or of soda, with the addi- 
tion of carbonate of ammonia. 
The socla, by this method, is the only ingredient which is 
not precipitated, and which therefore, can only be inferred 
* It is but just to mention that I received, in this part of the inquiry, much 
valuable aid from Mr. Wilson, who has many years acted as assistant, to my col- 
leagues and myself, in the Chemical Theatre of Guy’s Hospital. 
MDCCCXIX. C C 
