284 DR. KANE ON THE CHEMICAL HISTORY OF ARCHIL AND LITMUS. 
These results indicate the formula C 22 H 10 0 19 , and give the per cent, composition, 
which, with the theory, follows. 
Theory. 
22 Carbon . 134*2 45*31 
10 Hydrogen . 10*0 3*37 
19 Oxygen . 152 0 51*32 
Experiment A. 
44*79 
3*78 
51*43 
Experiment B. 
45*35 
3*67 
50*98 
296*2 100*00 
100*00 100*00 
These crystals were afterwards exposed to a current of dry air at 212° Fahr. in 
Liebig’s drying apparatus, but did not lose any water. 
To determine the constitution of the salts of telerythrine, the precipitate produced 
by it in a solution of sub-acetate of lead, having been dried at 212°, was analysed. 
A. 1*180 gramme of material gave 0*691 of metallic lead, and 0*037 of oxide of lead. 
1*982 gramme of same substance gave 1*097 of carbonic acid, and 0*230 of water. 
B. Another portion was afterwards prepared by the same means : of it 
1*124 gramme gave carbonic acid 0*628, and water 0*158. 
1*162 gramme gave oxide of lead 0*127, and metallic lead 0*604. 
These results lead to the formula C 22 H (J 0 18 + 5 PbO, and the composition per- 
cent. is 
22 Carbon . . 
Theory. 
. 134*2 15*88 
Experiment A. 
15*29 
Experiment B. 
15*46 
9 Hydrogen 
9*0 
1*07 
1*30 
1*56 
18 Oxygen . . 
. 144*0 
17-04 
1 7*22 
15*94 
5 Oxide of lead 
. 558*0 
66*01 
66* 19 
67*04 
845*2 
100*00 
100*00 
100*00 
The telerythrine is produced, therefore, from the amarythrine by the removal of 
tour equivalents of hydrogen and the absorption in their place of four equivalents of 
oxygen ; and the complete series of reactions which I have pointed out hitherto may 
be thus expressed : 
Erythryline . . . = C 22 H 16 0 6 
— ^3 + ^3 
Erythrine 
Amarythrine 
Telerythrine 
— c 22 h 13 o 9 
+ o 5 
^22 H 13 0 14 
- H 4 + o 4 
C 22 H q o 
18 * 
In this manner it appears, therefore, that the changes in the constitution ol the 
substances primitively existing in the Roccella Tinctoria proceed when exposed simply 
to the oxidizing agency of the air. In every one of these stages they are capable of 
