Mr. Horner on the Brine Springs at Drottwich* 103 



after the evaporation of successive portions of the brine, called 

 by the workmen pickings, and of which I procured specimens, is 

 entirely soluble in water. 



The brine appears to contain, besides muriate of soda, 



1. A sulphate, or sulphates, (by Exp. e.J 



2. Lime, (by Exp.y^J 



' 3. xVTagnesia, (by Exp. g. h.) 



The sulphuric acid may be in combination either with lime, 

 magnesia, or soda, or with all the three. 



The lime and magnesia may be in combination either with sul- 

 phuric or muriatic acid, or with both. 



§ 12. These preliminary experiments were made upon the 

 brine from the live different pits ; and as all the specimens gave 

 the same results, I considered it only necessary to determine the 

 proportions of the several ingredients in one of them. I em- 

 ployed for this purpose the brine from Walker's pit, as being the 



strongest. 



A. To determine the Amount of the Muriates, 



From one ounce measure of brine weighing 542.8 grs. I pre* 

 cipitated the sulphuric acid by nitrate of barytes, separated the 

 precipitate, and washed it with distilled water, until no change 

 was produced in the washings by nitrate of silver, and taking care 

 to add all these washings to the brine. I now precipitated the 

 muriatic acid by nitrate of silver, which last I added in excess. 

 The muriate of silver was washed with distilled water until no 

 change was produced in the washings by muriate of soda. It was 

 then dried in a low sand heat over a lamp, until it became of a 



