Mr. HoRl^ER on the Brine Springs at DrokwicL l07 



Exp. C. a. and B. e. the lime has been shewn to be in combination 

 with sulphuric acid : 5.68 grains of oxalate of lime, according to 

 Dr. Henry,* are equal to 7.1 grs. of sulphate of lime, both salts 

 being dried at 160°: there are therefore 2.37 grs. of sulphate of 

 lime in one ounce of the brine. 



3. From the several experiments made with the view of 

 determining the amount and nature of the sulphates, it has been 

 inferred that there are 4.47 grs. of sulphuric acid in combination 

 with soda in three ounces of the brine, which, (according to the 

 proportions of Kirwan of 25.52 acid, 18.48 soda, and 58 water,) 

 are equal to 7.98 grs. of dryf sulphate of soda, or 2.66 in 

 one ounce. 



4. By Exp. B. it has been shewn that there are 0.32 gr. of 

 muriate of magnesia in three ounces of the brine or 0.11 in 

 one ounce. 



Therefore the several salts contained in the ounce of the brine 

 consist of 



1. Muriate of soda . . 140.52 grs. = 2248.32 grs. in a pint. 



2. Sulphate of lime . 2.37 37.92 



"a Sulphate of soda . 2.65 42.40 



4. Muriate of magnesia. 0.11 — — 1.76 



145.65** 2330.40* 



* Phil. Trans. 1810. 



^ I calculate the sulphate of soda in the dry sfate, because in the estimate of (hr 

 quantity of entire salt, in the brine (with v.iiich the gross amount of the several 

 ingredients obtained separately will be compared) the residuum was dried in a hcac 

 sufficient to drive off the water from the sulphate of soda. To proTe this, I exposed 

 ih'i grs. of the entire salt which had been dried in tlie same way, to a strong red heat 

 in a platiua crucible, and there was only a loss of about |ths of a grain, and that loss 

 must have arisen from the water that would be separated from the sulphate of lime. 



** This excess in the amount of salt obtained by the estimate of the several intjredients, 

 may probably arise from the diihculfy of drying tiic different salts to the pr^;cibe point 



o 2 



