220 E. DIVERS AND T. HAG A : 



These he prepared by partial siilphonation of the nitrite in 

 known ways. They both yielded crystals of a hydroximidosul- 

 phate when dissolved in a little water and differed in no essen- 

 tial particular from nitrito-hydroximidosul pates. From hot 

 solutions of nitrite and a hydroxiraidosulphate we obtained by 

 cooling an apparently homogeneous crop of crystals of almost 

 the same composition and properties as one or other of Raschig's 

 salts. Raschig gave two ways for preparing the salt having the 

 second of the formulae just given and in these ways we have 

 obtained the nitrito-2/3 normal hydroximidosulphate already de- 

 scribed in this paper, but mixed with a little potassium sulphite. 

 This impurity accounts for the alkaline reaction of Raschig's 

 preparation and the presence in it of a little more than Ko to S2. 



He got the other salt (K., to S) only once and in the form 

 of white crusts when working unsuccessfully for hydroximidosul- 

 phate in Claus's way, the other main product being imidosulphate, 

 that is hydrolysed nitrilosulphate as he himself pointed out. 

 We have obtained — also by sulphonating nitrite, following Fremy 

 — a product qualitatively like Raschig's salt though quantitatively 

 a little different from it, and at the same time like the second 

 salt compounded of nitrite and 0/6 normal hydroximidosulphate, 

 described by us on page 218. The percentages found by Raschig 

 were potassium, 36.84, and sulphur, 15.50. 



When Raschisr's salt was dissolved in water and acidified it 

 gave nitrous oxide as the only gaseous product while ours gave 

 also some nitric oxide. This fact might have served lo render 

 incorrect the application of our formula to his salt but for the 

 evidence there is that this was mixed wâth a little sulphite which 

 would have reduced any nitric oxide. Its mother-liquor on 

 further evaporation gave, we are told, so much sulphite along 



