PHOSPHATS. 
a cooling and sweetish impression upon the tongue. Its 
specific gravity is 1.5489*. 
It requires about 15 parts of cold water to dissolve 
it. It is more soluble in boiling water, but it crystal 
lizes in part as the solution cools. When exposed to 
the air, it loses its water of crystallization, and falls 
down in powder. 
When heated moderately, it is also reduced to a dry 
powder. In a high temperature, it melts into a trans 
parent glass. 
According to Fourcroy, it is decomposed by the fol 
lowing salts : 
1. Sulphats of glucina, zirconia. 
2. Sulphites of barytes, lime, potass, soda, glucina. 
3. Nitrats of barytes, strontian, lime. 
4. Muriats of barytes, strontian, glucina, zirconia. 
5. Phosphites of lime, barytes, strontian, potass, soda. 
6. Fluats of lime, barytes, strontian, potass, soda, am 
monia. 
7. Borats of lime, barytes, strontian, potass, soda. 
8. Carbonats of strontian, lime, potass, soda. 
This salt has not been applied to any use. 
Sp. 10. Phosphat of Ammonia-and-magnesia. 
THIs salt was first discovered by Fourcroy, who 
found it in a calcalous concretion formed in the co 
lon of a horse. Since this discovery Fourcroy and 
Vauquelin have observed it also in human urine. 
It might be prepared by mixing together solutions of 
the phosphats of ammonia and of magnesia in water ; 
the triple salt immediately precipitates in the state of 
* Hassenfratz, Ann. de Chim. xxviii. 12. 
Z 3 
357 
Chap. III. 
Decomposi 
tion.