AMMONlAi 23 



useful in dispersing indolent tumours, if 

 mixed with an equal quantity of sweet oil, 

 in which camphor has been dissolved. It is 

 a good application also in swellings of the 

 back sinews, or other parts, in consequence 

 of strains or bruises. Water of pure aynmO' 

 nia is too strong for internal use ; but when 

 ammonia is by a chemical process combined 

 with carbonic acid, or fixed air, it assumes a 

 solid form, and is rendered sufficiently mild 

 for internal use. In this state it is named 

 prepared ammonia, volatile sal ammoniac, or 

 smelling salt, being much used for smelling- 

 bottles, as its quick pungent odour is well 

 calculated to remove faintness. 



Prepared Ammonia is an excellent 

 stimulant and cordial, and may be given in 

 doses from half a dram to two drams. I 

 have seen it very serviceable in the latter 

 stages of fever, when debility is the lead- 

 ing symptom. 



When prepared ammonia is dissolved in 

 water to saturation, it forms water of mild 

 amjnonia, or common spirit of sal ammoyiiae; 

 when distilled with spirit and some aromatic 

 oils, spirit of sal volatile, or compound spirit 

 of aynmonia; and if assafcetida be added, 



