393 
but the forms are indistinct. These crystals readily scratch cale 
spar, and dissolve without residue in water, affording a solution, 
which, by evaporation at 150° F., leaves the salt with some of 
the original physical characters. It readily parts with a portion 
of water by heat, and when the temperature is raised to redness, 
it fuses quietly into a transparent, colorless, anhydrous fluid; on 
cooling, an opaque, white, crystalline solid remains. In this 
climate the specimen attracts moisture, and therefore has not a 
fixed amount of water constituent. 
It consists of water, sulphuric acid, soda, magnesia, chlorine. - 
Mixed with it are traces of crenate of iron and lime, with sandy 
grains of earth. 
One sample afforded — 
Water : i ; : ; =l 6.420 
eerie sola è i i i a : 49.658 
Sod ; : j : 23.798 
i i E : à : $ . 9.904 
Chlorine : » x " * .260 
100.000 
Three fragments from different masses were taken, and the . 
following substances found : — i; 
Wat : : 
Sulphate of Soda : 48.00 . 4 
"Magnesia 34.20 sh 7 HOW x 
Cllocide Sodium , 1.91 1.79 
Crenates Lime and Iron 
.90 
with Silicie Acid ee 0.17 A : 
Sand : : 
0.06 . 
100.00 100.00 - 
Pe varying amounts of water given, are illustrative of dis 
“sorptive power of the salts in the atmosphere of this place. 
E 90° F., the amount of water was 15.20 in 100 parts, | 
Wich exceeds by four parts, the ~~ negessary to form — P 
: Proin of the two salts prese i 
_ Analysis does not show the*two culate to be in deii | 
