1 80 Analysis of several Variet les of Salt. 



if the brine be fully charged with salt, it effects no solution 

 of the muriate of soda, carried down along with the gyp- 

 sum; and then the first species of pan-scale results. 



5. The salt oil, or mother liquor from sea water, a spe- 

 cimen of which I received from Dr. Thomson^ had the 

 specific gravity of 1277- It was abundantly precipitated 

 by muriate of barytes ; by pure ammonia, but not by the 

 carbonate ; and was not changed by oxalate of potash, 

 either immediately or after an interval of some hours. One 

 thousand parts of the dry salt consisted of 



Muriate of magnesia 874 



Sulphate of magnesia 70 



Muriate of soda 56 



1000. 



6. The salt Irine, or liquor which drains from the Scotch 

 salt, had the specific gravity of only 1 188. It was affected 

 by the same tests as the salt oil, but less remarkably. The 

 dry residue contained 



Muriate of magnesia 205 



Sulphate of magnesia 135 



Muriate of soda 1 . 660 



1000. 



7. The mother liquor, or lit tern pan Lymington, pre- 

 sented, on analysis, an unaccountable variation from the 

 similar fluid sent from Scotland, and gave a much larger 

 proportion of sulphate of magnesia. A considerable quan- 

 tity of this salt had, moreover, crystallized in the bottle 

 which contained the liquid. Its specific gravity was 1280. 

 One thousand parts of the dry salt contained of 



Muriate of magnesia 640 



Sulphate of magnesia 260 



Muriate of soda 1 00 



1000 



8. The pan-scale from Lymington contained 



Muriate of magnesia 29 



Desiccated sulphate of magnesia 18 



Carbonates of lime and magnesia* ... 127 



Sulphate of lime 216 



Muriate of soda 610 



1000. 



* The proportion of these carbonates I was by an accident prevented 

 from determining. 



From 



