DR. KANE ON THE CHEMICAL HISTORY OF ARCHIL AND LITMUS. 291 
I will now proceed to describe the analyses which were made of the two forms of 
orceine and of their salts. 
A. Analysis of Alphaorceine. 
A. 0-302 gramme of substance gave 0-829 of carbonic acid, and O’ 192 of water. 
B. 0*417 gramme gave 0-950 of carbonic acid, and 0*229 of water. 
These results lead to the formula C 18 H 10 N 0 5 , giving 
Theory. 
Experiment A. 
Experiment B. 
18 Carbon . . 
109-8 
63-14 
63-32 
63-04 
10 Hydrogen . 
io-o 
5-75 
5-89 
611 
1 Nitrogen . . 
14-1 
8*11 1 
30-79 
30-85 
5 Oxygen . . 
40-0 
23-00 J 
1739 
100-00 
100-00 
100-00 
A solution of alphaorceine in ammonia was decomposed by acetate of lead, and 
the mixed liquors rendered exactly neutral by the cautious addition of acetic acid ; 
there was produced a beautiful purple precipitate, which dried at 212°, gave the fol- 
lowing results, from which the formula C 18 H 10 N 0 5 + 3 Pb O may be deduced. 
0-531 of substance gave 0-409 of carbonic acid, and 0*106 of water. 
0 - 354 gave 0-162 of oxide of lead, and 0’067 of metallic lead. 
The numerical results are hence 
Theory. 
Experiment. 
18 Carbon . . 
109-8 
21-58 
2T29 
10 Hydrogen . 
io-o 
T9 7 
2-21 
1 Nitrogen . . 
141 1 
10*63 
10-37 
5 Oxygen . . 
40-0 J 
3 Oxide of lead 
334-8 
65-82 
66-13 
508*7 
100-00 
100-00 
B. Analysis of Betaorceine. 
The betaorceine was, previous to analysis, dried in Liebig’s apparatus at a tempe- 
rature of 212°. 
A. 0 201 gramme of material gave 0*402 of carbonic acid, and 0*097 of water. 
B. 0*248 gramme of same substance gave 0*493 of carbonic acid, and 0*1 13 of water. 
C. 0-381 gramme of a different specimen gave 0*752 of carbonic acid, and 0*169 of 
water. 
These results give in 100 parts 
Carbon .... 
A. 
. 55-30 
B. 
54-97 
C. 
54-58 
Hydrogen . . . 
5-35 
5-0 7 
4-92 
Oxygen and Azote 
. 39-35 
39-96 
40*50 
100-00 
100-00 
100-00 
2 p 2 
