DR. KANE ON THE CHEMICAL HISTORY OF ARCHIL AND LITMUS. 321 
0 525 gramme, dried at 212°, gave 0*200 of water, and 0*788 of carbonic acid. 
1*225 gave 0*653 of chloride of silver. 
These results are expressed by the formula C 18 H 10 N 0 12 Cl, the numbers being 
Theory. 
Experiment. 
18 Carbon. . 
. 109*8 
41*38 
41*51 
10 Hydrogen. 
10*0 
3 ‘77 
4*23 
1 Nitrogen . 
14*1 1 
41*50 
41*11 
1 2 Oxygen 
. 96*0 J 
1 Chlorine . 
35*4 
13*35 
13*15 
265*3 
100*00 
100*00 
It is not easy to see how this compound arises directly from the chlororceine, and 
it can only be in virtue of a very complex decomposition. The portion, which dis- 
solves less easily in water of ammonia, not having been analysed, its constitution can 
only be surmised. If all the chlorine had been removed by the alkali, and replaced 
by oxygen, it is evident that azolitmine should be produced, which is certainly not 
the case; and I hence consider that by the action of the alkali one half of the chlo- 
rine is removed, and a substance generated, expressed by the formula C 18 H 10 N 0 9 Cl, 
which being subsequently decomposed by the excess of alkali may be supposed to 
break up into C 18 H 10 N 0 6 Cl, and C 18 H 10 N 0 12 Cl, of which the latter is that ana- 
lysed. I throw out this suggestion without attaching much weight to it, for although 
it is not likely that the true theory is far from that now described, yet the study of 
this reaction is of course very incomplete. 
Action of Chlorine on Azolitmine. 
By the action of chlorine on azolitmine, there is produced a peculiar yellow sub- 
stance, insoluble in water, soluble in alcohol and ether ; soluble also in alkalies, from 
whence it is precipitated unchanged by the addition of an acid. It is capable of 
uniting, by means of double decomposition, with metallic oxides and forming salts. 
The name of chlorazolitmine may be applied to it. 
Its analysis gave the following results : 
A. 0*217 gramme gave 0*123 chloride of silver. 
0*314 gramme gave 0*498 of carbonic acid, and 0*133 of water. 
B. 0*859 of another portion, dried at 212° Fahr., gave 0*511 of chloride of silver. 
0*535 gramme gave 0*834 of carbonic acid, and 0*221 of water. 
The composition in 100 parts is hence 
A. 
B. 
Carbon 
. 43*95 
43*13 
Hydrogen 
. 4*70 
4*59 
Oxygen and Nitrogen 
. 37‘39 
37-60 
Chlorine 
. 13*96 
14*68 J 
2 T 
MDCCCXL. 
