ACTION OF SULPHURIC ACID UPON THE AMIDES AND NITRILES. 
457 
From these data we calculate for the anhydrous salt the formula 
C H Ba S 2 Oe, 
which requires the following- numbers : — 
Theory. 
A 
Mean of experiments 
1 
equiv. of Carbon . • 
' 
6 
3*85 
3*71 
1 
equiv. of Hydrogen . 
1 
0*67 
0*63 
1 
equiv. of Barium . . 
. 68*5 
44*05 
44*05 
2 
equivs. of Sulphur. . 
. 32 
20*57 
20*83 
6 
equivs. of Oxygen . 
. 48 
30*86 
30*78 
155*5 
100*00 
100*00 
Considerations which we shall develope hereafter, especially the production of 
similar compounds in analogous series, induce us to double this expression, and to 
represent the new barium-salt by the formula 
Cg (Ha Baa) S4 Oia. 
The salt, as has been stated, retains water of crystallization at 100® C. In deter 
mining this water, — 
I. 0*8414 grm,, dried at 100 °, lost 0*0888 grrn. at 190° C. 
II. 0*5820 grm., dried over sulphuric acid, lost 0*0613 grm. at 210 ° C. 
These results indicate four equivalents of water : 
Theory. Experiment. 
A ^ 
1. II. 
10*37 10*55 10*53 
The formula of the crystallized salt is therefore 
Ca (Ha Baa) ^4 Oia+4aq. 
We propose for this substance the name disulphometholate of barium, and for the 
acid the term disulphometholic acid, without wishing, however, to express by this term 
any particular view regarding the actual arrangement of the constituent molecules 
in the substance. 
If the formula above given be correct, disulphometholate of barium is the salt of a 
bibasic acid, the composition of which would be represented by the expression 
Ca H4S4O12, 
furnishing salts of the general formula. 
Acid salt . . . Ca(H 3 M)S 4 0 i 2 
and Neutral salt . . Ca (Ha Ma) S 4 Oja. 
The barium salt which has been described belongs to the second class. 
We have not yet succeeded in preparing any acid salts. Disulphometholate of 
barium crystallizes unchanged from a hydrochloric acid solution. 
