Elements of Mineralogy. 



SPECIES XVII. 



Nitrous Ammoniac. 



It generally deliquefces j when mixed with 

 a fixed alkali, the volatile betrays itfelf by its 

 fmell ; it deflagrates when the containing 

 veflel is heated nearly red ; with fpirit of fait 

 it makes aqua regia. 



100 Parts of it contain 46 of nitrous acid, 

 40 of volatile alkali, and 14 of water, as I 

 believe. 



It is frequently found in the mother liquor 

 of nitre, Linne von Gmelin^ 332, Weber 

 Abhand) von den Salpetre> 17. 



SPECIES XVIIL 

 Nitrgus Selenite, 



This alfo deliquefces, its tafte is bitter, 

 fixed alkalis decompofe it, and form cubic 

 or prifmatic nitre, but cauftic volatile alkali 

 cannot decompofe it, it does not deflagrate, 

 yet paper moiftened with a faturate folution 

 of it, crackles on burning, it lofes its acid in 

 a ftrong red heat, its folution will not trouble 

 that of filver in the nitrous acid ; vitriolic 

 acid will precipitate its bafis, as will the acid 

 of fugar, 



100 



