8 AET. fi. — T. IIAGA. 



.2739 gave 12.58cc moist nitrogen at 



19.0° and 7o6.1mm. Nitrogen = 5.22 



B. .2679 gave .1751 potassium sulphate. Potasium = 28.74 

 .2684 gave 11.9cc. moist nitrogen at 



16.7° and 765.5mm. Nitrogen = 5.19 



HO7NS2K2 requires potassium, 29.06; sulphur, 23.79; nitrogen, 



5.21 per cent. In all analyses given in this paper sulphur was 



determined by heating the salt with hydrochloric acid in a 



sealed tube at 180 for five hours or at 200° for two hours. 



Trijyotassium Hydroxylamine-aß-disulphonate, (SO.o,K) ONK (SOo 

 K)22H20. — This salt is precipitated, at first as an oil, when 

 alcohol is added to its concentrated aqueous solution, prepared by 

 dissolving the disulphonate in a little hot water and adding to it 

 the calculated quantity of potassium-hydroxide solution. The oily 

 salt slowly solidifies into lumps of microscopic crystalline plates. 

 The quantity obtained should be about equal in weight to that 

 of the disulphonate used, the calculated quantity being five parts 

 from four. It is very soluble in water. Its solution is not 

 precipitated by barium chloride, in this respect being unlike a 

 solution of the corresponding ^9,9-salt. It is caustic in taste, and 

 ex2:)lodes suddenly when heated. 

 Analysis: .1696 gave .1286 potassium sulphate. Potassium = 34.05 



.2588 gave .1944 potassium sulphate. Potassium = 33.73 



.1568 gave .2343 barium sulphate. Sulphur = 20.52 

 H40yNS2K:> requires potassium, 34.18 ; sulphur, 18.6(> per cent 

 The disodium salt, (S0:;Na)0NH(S03Na), is like the ßß-sa\t, 

 anhydrous. The very soluble sodium hydroxylaminetrisulphonate 

 is dissolved in five times its weight of water and acidified with 

 dilute sulphuric acid. In two or three days at the ordinary 

 temperature it will have all hydrolysed and the solution is then 



