100 Mr. Horner on the Brine Springs at Droltivich, 



and no change of transparency was produced, when left exposed to 

 the air in an open vessel, for several days. 



Its taste is intensely saline, but without any degree of bitterness ; 

 neither is there any bitter taste in the crust which is deposited at the 

 bottom of the pans, after several successive portions of brine have 

 been evaporated. 



The temperature of the brine in the pits, a few feet below the 

 surface, differed very little from that of springs in general. It 

 was ^5°. * 



^ § 10. Specific Gravity^ and Amount of the solid Contents. 



The specific gravity of the several brines I found to be as fol- 

 lows : 



Walker's pit, . . 



. . 1206.1]f 



Walvv_yn's pit, . . 



. . 1203.83 



Romney's pit, . . 



. 1200.15 



Stuckey's pit, . . 



. . 1184.67 



Farley's pit, . . . 



. . 1174.71 



* 1 omitted to note down the temperature of the air, but it was a warm day for the 

 season of the year. 



+ This is not an absolutely saturated solution, for by adding salt to the brine at a 

 boiling heat, and allowing it to cool to 60», I obtained a perfectly limpid solution of the 

 specific gravity of 1210.39. This sp. gr. almost exactly corresponds with that of 

 Hassenfratz, An. de Chemie. vol. 28, p. 298. In the sixtieth volume of the Philo- 

 sophical Trans. Dr. Watson, the present Bishop of Llandaff, has given a valuable 

 paper, entitled, " Experiments and Observations on various Phenomena attending the 

 Solution of Salts." — He has constructed a table of the specific gravity of water im- 

 pregnated with (Irfferent quantities of common salt, from |. down to the 1024th part of 

 the weight of the water, at a mean temperature of 50". The salt used was sea-salt, 

 of the finest kind, and extremely dry. 



The highest specific gravity which he gives, is 1206, which very nearly corresponds 

 ■with that of Walker's pit; but from what has been said above this is not the specific 

 gravity of a fully saturated solution* 



