COMBINATIONS OF OXIMURIATIC ACID AND METALS. gl 



plete. There is always left a small and variable quantity of 

 black oxide, which may be considered, on account of its va- 

 riability, ill a state of mechanical mixture, rather than of 

 chemical union with the ferrane. 



Ferranea is entirely soluble in water. The solution is Solutionofthe 

 identical with the red muriate of iron. ~"^' 



The analysis of both these compounds is easily effected Analysij 

 by means of nitrate of silver. 



50 grains of ferrane were put into water: the insoluble of the 1st 

 residue separated from the solution by Recantation ; washed 

 dried, and heated to redness for a minut-e, previously moist- 

 ened with oil, weighed 3 grains, and was in the state of the 

 black oxide, being- attracted by the magnet. The solution 

 entire, precipitated by nitrate of silver, afforded 102*5 grs of 

 dried horn silver, which indicating 25* 11 25 grs of chlorine, 

 the proportion of iron, omitting the 3 grains of oxide, 

 appears to be 21*8875. And hence 100 of ferrane seem to 

 consist of 



53*43 chlorine 

 46'57 iron 



100- 



Ferranea is not easily obtained in considerable quantities, and of the 2d. 

 I have been obliged in consequence to operate upon small 

 portions. The subject of analysis was procured by sublim* 

 ation from the residue by evaporation of the red muriate. 

 20 grs of this, in brilliant scales, were weighed in water. The 

 solution, precipitated by nitrate of silver, yielded 53 grs of 

 dried horn silver. Hence 100 of ferranea appear to consist 

 of 



64'9 chlorine 

 55*1 iron 



100- 



(To he concluded in our next. J 



X. 



