Anatyjis of the Ho my -J lone, or MeU'dt, 33J 



gramme. Whefa mixed with fulphuric acid diluted with 

 water, they produced a flight effervefcence : the mixture was 

 then evaporated todrynefs. 



According to what had been announced by Profeflbr Klap- 

 roth, I expected that by the addition of water almoft the 

 whole of the above matter would be diflblved ; but, on the 

 contrary, the greater part remained under the form of <%. 

 white powder. 



The liquor having been evaporated till there remained no. 

 more than 3 or 4 grammes, I added to it a drop of the. 

 iulphat of potafh, and obtained by fpontaneous evaporation 

 about o- 1 gramme of alum mixed with a little fulphat of 

 lime. 



I then examined the nature of the matter, which when 

 treated with fulphuric acid had not diflblved in water. For 

 this purpofe I boiled it with a folution of the carbonat of 

 potafh, and, when filtrated and wafhed, I had the following 

 remit ; 



tft. The muriatic acid, diluted with two parts of water, 

 attacked it, exciting a ftrong effevvefcenee ; but the folution 

 did not become clear; on the contrary, it remained milkv. 



2d. The liquor, wlien filtrated, gave with ammonia a 

 tranfparent precipitate, refembling that anting from ahunim- 

 by the fame means ; but it was not entirely lbluble in pot- 

 afli. The greater part however was diflblved by the potafli, 

 and exhibited all the characters of aluminfej for, when com- 

 bined with the fulphuric acid, it gave alum. The caufe 

 therefore why this fubflance did not remain combined with 

 the fulphuric acid was, in all probability, its being too much 

 heated towards the end of the deficcation. 



The liquor from which the ammonia had feparated the 

 alumine already fpoken of ftill gave flight precipitates by the 

 carbonat of potafh and the oxalat of ammonia j which 

 proves that it contained a little lime. 



That portion of the matter not diflblved by the potafh 

 weighed at moft cri gramme, and appeared to me to bejllex. 

 Mellite then contains a fmall quantity of lime and filex. 



After afcertaining the kind of matter which compofed my 



rcfiduum, I then examined the liquor, which I concluded 



3 muffc 



