212 MURIATES AND CHLORIDES. 



1. Muriate of ammonia. This salt I find, 

 when obtained in the usual way by sublimation, 

 is anhydrous, and is a compound of 



1 atom muriatic acid 4-625 

 1 atom ammonia 2-125 



6-75 



The water found in this salt by Dr. Murray was 

 no doubt accidental. It has an affinity for water, 

 and even deliquesces if kept in a damp place ; 

 but the quantity of water found not amounting 

 to an atom, it is obvious that it cannot be consi- 

 dered as a chemical constituent of the salt. 

 chlorides 2. Muriate of potash and muriate of soda 

 exist only in solution when separated by eva- 



poration in the state of crystals, they are no 

 longer muriates but chlorides ; for 9*7?6 grains 

 of the crystals, usually called muriate of potash, 

 when exposed to a red heat lose 0*276 grain of 

 water, and leave 9*5 grains of the fused salt ; 

 and when these 9*5 grains of salt are dissolved 

 in water, and thrown down by nitrate of silver, 

 the chloride of silver after fusion weighs just 

 18-25 grains, equivalent to 4*5 grains of chlorine. 

 It is obvious then, that the crystals must be com- 

 posed of 



1 atom chlorine , 4-5 

 1 atom potnssium 5 



9-5 



