THE IMIDER OF THE AROÎIATIO SULPHONIC ACIDS. 15 



essentially as in equation (2), a small fraction of it decomposing 

 in a different manner, so as to give rise to tribenzenesulpho- 

 liydroxylamine. But as the quantity of this substance is very small, 

 its production may, for the present, be left out of consideration. 



All the facts combined make it, therefore, highly probable 

 that the reduction of dibenzenesulphohydroxylamine takes place 

 according to equations (1) and (2). Further, the relation 

 between the quantities of the gaseous and other products of the 

 reaction obtained in the experiment, described on p. 11, agrees 

 sufficiently well with the theory that, out of a hundred molecules 

 of dibenzenesulphohydroxylamine, eighty four molecules decompose 

 according to equation (1), and sixteen molecules decompose 

 according to equation (2). 



In the following table the Aveights of the dibenzeuesul- 

 phimides and of the sulphurs of the total sulphates, obtainable from 

 2.21 grammes of dibenzenesulphohydroxylamine (p. 9), are given, 

 the numbers under I and II having been calculated on the sup- 

 position that 84 and 80 per cent, respectively, of the substance 

 decomposed according to equation (1), the rest decomposing in 

 accordance with equation (2). 



I II Found 



Dibenzenesulphimide. 1.9294 1.9504 1.9276 



Total sulphate sulphur. 0.1900 0.1945 0.1893 



Gas calc. as nitrous oxide. 0.0124 0.0109 0.0083 



It will be seen that the calculation on the assumption, that 

 86 per cent of the substance decomposed according to equation 

 (1), gives larger figures for dibenzenesulphimide and total 

 sulphate sulphur than those actually found. The difference is a 

 little more than can be explained by errors of analysis. The 



