14 AEÏ. 6. — ï, HAGA. 



No ammonia is generated, the only products being those already 

 mentioned. 



When the gases were to be collected the salt was heated 

 with one and a half to twice its weight of potassium hydroxide 

 and about four times its weight of water for six hours at 100° 

 or for four hours at 120° in a tube retort connected with a 

 Sprengel pump. Needless to say, explosive ebullition and corrosion 

 of the hard glass tube (rendering it opaque) had to be encount- 

 ered as difficulties. When the gases were to be allowed to escape, 

 the mixture was heated in a platinum dish on the water bath. 

 For analysis, the residue in either case was made fohitly acid to 

 Phenolphthalein by nitric acid, and sulphate then preci2)itated 

 by barium nitrate. The thoroughly washed precipitate was purified 

 in the usual way by fusion with an alkali carbonate before 

 weighing. The aminesulphonate was precipitated by mercuric 

 nitrate, the mercuric salt was hydrolysed, and the sulphuric acid 

 and sometimes the ammonia resulting were determined. The 

 filtrate from the mercury precipitate always showed the presence of 

 hydroxy lamine-«/9-disulphonate. 



In an experiment with 1.057 gram of salt, the sulphur found 

 as sulphate was 66.82 per cent., and that as aminesulphonate 

 10.73 per cent, of the total sulphur, leaving 17.45 to be accounted 

 for as undecomposed salt. Of the total nitrogen, 29.64 per cent, 

 were got as ammonia from the aminesulphonate, and 48.89 per 

 cent, as gas (27.85 cc. moist nitrogen at 18° and 639.8 mm. = 

 .002692), leaving 21.47 per cent, as undecomposed salt. The 

 difference between 17.45 and 21.47, perhaps due to slight leakage 

 of air into the apparatus during the six hours heating, is not at 

 all so significant as it is made to appear by the way of stating 

 the results, the total percentage of nitrogen in the salt being only 



