I'EKOXYLAMI SKSUI.rilON \ TES AND HYDROXYLAMINETRISULPHONATES. 1 I 



cylindrical bolt-head, of aboul 250 c.c. capacity, with a stopcock 

 sealed on to it, was exhausted and then opened with its mouth in the 

 solution of peroxylaminesulphonate and potassium hydroxide. Aboul 

 200 c.c. were allowed to enter, holding between 6 and 7 grams of the 

 salt in solution. The tube was again exhausted and the stopcock 

 being then closed, the salt was decomposed by heating the solution. 

 When cold, the apparatus was connected with a Sprengel-pump and 

 the gases drawn off and measured. They proved to be free from nitric 

 oxide, but, on treatment with strong alcohol, a small proportion of 

 nitrogen remained undissolved. The experiments with this method 

 of determining the gases have been very few and not such as have 

 admitted of their utilisation in this paper, beyond giving proof that 

 nitrogen in small quantity is generated along with the nitrous oxide, 

 which is the main constituent of the gaseous mixture, and that the 

 quantity of the gases may vary greatly in different experiments. 



Where the decomposition of the peroxylaminesulphonate 

 proceeds in the presence of lead peroxide, as it is made to do in the 

 preparation of hydroxylaminetrisulphonate, no hydroxylamine- 

 disulphonate can remain in the solution, and in place of it is found 

 principally an increase in the quantities of trisulphonate and nitrite. 

 The absence of the disulphonate simplifies the analysis as is seen 

 on page 23. 



Eight analyses of the products of the spontaneous decomposition 

 of the peroxylaminesulphonate were made. In Expt. 1, a solution 

 holding 2.3184 grams of potassium peroxylaminesulphonate and GO 

 c.c. of N/10 solution of potassium hydroxide was made up to 150 c.c. 

 and then found to weigh 150.79 grams. It was slowly heated to the 

 boiling point, and kept boiling till decolorised. Expt. 2. — The 

 solution weighing 234.3 grams and containing :'•."> 17 grams of the 

 salt and 72*3 c.c. of N/10 potassium hydroxide was left in the cold 



