23$ EDWARD DIVERS AND TAMEMASA HAGA; 



mouia. In our accounts of imidosulphonates and oxûnidosulphonates, 



already published, we have had occasion to point out the apparent 

 functioning of these salts as amines towards nitric acid. 



Hydroxylamine amidosulphonate has only been obtained as an 

 uncrystallisable viscous hygroscopic liquid. It was prepared by de- 

 composing hydroxylamine sulphate by its equivalent of barium amido- 

 sulphonate. 



Ferrous amidosulphonate. — This salt was prepared from the acid and 

 iron -wire, with exclusion of air. Since the solution of this very 

 soluble salt has to be evaporated in vacuo, it is well to use much less 

 water than would dissolve all the acid, for this then goes into solution 

 in proportion as it is consumed by the iron. The solution and crystals 

 have the usual blue-green colour. The solution shows supersaturation, 

 like many other amidosulphonates, and the salt is consequently 

 obtained in the form of a cake of radiating prisms, just like the zinc 

 salt. It is deliquescent, and, unlike the sulphate, is not precipitated 

 by alcohol. Pressed in filter paper, but still slighty damp, some of the 

 salt showed, by permanganate, the presence of 16.48 per cent, of iron. 

 A salt with 40H 2 would have 17.5 per cent, of iron and one with 

 50H 2 , 16.57 per cent. The latter must, we think, be taken as the 

 right expression. Analogy is not available for deciding the point, for, 

 according to Berglund, though the zinc salt has 40H 2 , the nickel, 

 cobalt, and manganese salts have 30H 2 , the cadmium salt, 50H 2 , and 

 the copper salt, 20H 2 . The magnesium salt has not been prepared. 



Ferric amidosulphonate. — This salt was prepared by dissolving ferric 

 hydroxide and the acid in water. Its solution is of a bright brown 

 colour and dries up into an opaque, amorphous, brittle mass, of the 

 colour of ferric hydroxide. It is very soluble in water but is not at all 

 deliquescent. It has the full astringent taste of the ferric salts of 

 inorganic acids, not that of the citrate or tartrate. 



