322 DR. KANE ON THE CHEMICAL HISTORY OF ARCHIL AND LITMUS. 
Whence the formula C 18 H 10 N O 10 Cl ; and the reaction appears to be extremely 
simple, consisting in the addition of an equivalent of chlorine without any elimina- 
tion of hydrogen. The numbers deduced from the formula are 
18 Carbon. . . 
109*8 
44*04 
10 Hydrogen. . 
10*0 
4*01 
1 Nitrogen . . 
14*1 1 
3 775 
10 Oxygen . . 
80*0 J 
1 Chlorine . . 
35*4 
14*20 
249*3 
100*00 
The leucazolitmine, if it could have been analysed in a pure condition, would very 
probably have been found similar in constitution to chlorazolitmine. The bodies 
C 18 H 10 N O 10 . H ., and C 18 H 10 N O 10 . Cl being to each other as C 18 H 10 N 0 8 . H 2 , 
and C 18 H 10 N 0 8 . Cl 2 . 
Action of Chlorine on Erythrolitmine. 
When erythrolitmine is diffused through water, and a current of chlorine passed 
through it, it changes into a buff-coloured substance, which is insoluble in water, and 
resembles all the other bodies, formed by the decolorizing action of chlorine upon 
these colouring matters, in its general properties. It may be termed chlorerythrolit- 
mine, and was analysed after having been dried at 212° in Liebig’s apparatus. 
A. 0*412 gramme gave 0T18 of chloride of silver. 
0'433 gramme gave 0*896 of carbonic acid, and 0*318 of water. 
B. 0*732 of another specimen gave 0*197 of chloride of silver. 
0*365 gave 0*759 of carbonic acid, and 0*270 of water. 
The resulting composition per cent, is 
A. 
B 
Carbon .... 
57*24 
57'51] 
Hydrogen . . . 
8*15 
8*22 
Oxygen. . . . 
27-56 
27-62 
Chlorine . . . 
7-05 
6*65 
:s the formula C 52 H 44 
Oi 9 Cl, giving 
52 Carbon .... 
317-2 
57-82 
44 Hydrogen . . . 
44*0 
8*02 
19 Oxygen. . . . 
152*0 
27-71 
1 Chlorine . . . 
35*4 
6*45 
548*6 
100*00 
100*00 
This result is very singular, inasmuch as the chlorine compound contains less oxy- 
gen than that from which it had been formed, and also that two equivalents of ery- 
throlitmine are involved in the decomposition which fixes one of chlorine. This may 
