ACTION OF SULPHURIC ACID UPON THE AMIDES AND NITRILES. 
459 
leading to the formula 
CaH,Ag,) 
Theory. 
Mean of experiments. 
2 equivs. of Carbon . 
r 
. . 12 
3*07 
2*97 
2 equivs. of Hydrogen 
. . 2 
0*51 
0*58 
2 equivs. of Silver . . 
. . 216 
55*37 
55*41 
4 equivs. of Sulphur . 
. . 64 
16*41 
12 equivs. of Oxygen . 
. . 96 
24*64 
390 
100*00 
Disulphometholate of Ammonium. 
The formation of this substance has been already described. It is sparingly soluble 
in cold, but very soluble in hot water; from which it is again deposited in colourless 
crystals, often an inch in length. They are anhydrous, decrepitate when heated, and 
bear a temperature of 190° without being changed. 
Through the kindness of Mr. Charles Brooke we are enabled to 
give the following angular measurements : — 
MM' 97° 45'. 
Mh 131° 15'. 
Mg 92° 50'. 
The form belongs to the oblique prismatic system, which is in 
fact nothing more than a hemihedral form of the right prismatic 
system. 
When submitted to analysis this salt gave the following results : — 
I. 0‘7692 grrn. at 190°, ignited with chromate of lead, gave 0*1501 grm. of carbonic 
acid and 0*3623 grm. of water; 
II. 0*5135 grm. at 150°, ignited with chlorate of potassium, gave 1*1425 grm. of 
sulphate of barium ; 
III. 0*4508 grm. at 170°, ignited with soda-lime, gave 0*9440 grm. of chloroplati- 
nate of ammonium ; 
IV. 0*5735 grm. at 170°, ignited with soda-lime, gave 1*1770 grm. of chloroplati- 
nate of ammonium ; 
these numbers correspond to the formula 
C2 [H 2 (NH 4 ) 2 ] S4O12. 
3 p 
MDCCCLVI. 
