MURIATES AND CHLORIDES. 



have never succeeded in converting the whole oi 

 any portion of protomuriate of iron into chloride : 

 on dissolving the chloride in water there always 

 remains more or less of oxide, so that a portion 

 of the muriatic acid is disengaged by the heat ; 

 but in the above statement this decomposition 

 was allowed for the portion decomposed being 

 abstracted from the original weight of salt em- 

 ployed. 



Q. Protomuriate of manganese. This salt is 



manganese 



easily formed by dissolving carbonate of manga- 

 nese in muriatic acid. It is not easily crystal- 

 lized : however, by very careful concentration of 

 the solution I have obtained very short six-sided 

 prisms, two opposite faces of which were much 

 larger than the other four. The taste of this 

 salt, like thai of the other salts of manganese, 

 has some resemblance to that of sulphate of 

 soda ; it is very soluble both in alcohol and wa- 

 ter, and is an exceedingly deliquescent salt. Its 

 constituents, when dried by pressure between 

 folds of blotting paper, are as follows : 



1 atom muriatic acid . 4-625 



1 atom protoxide of manganese 4'5 

 4 atoms water . . 4*5 



13-625 



When 13-625 parts of it are heated just to red- 

 ness, they lose 5 '625 parts of their weight, 



