398 
MR. STENHOUSE ON THE EXAMINATION OF THE 
tained by cautiously pouring bromine into a concentrated aqueous solution of orcine, 
giving at the same time an analysis of the compound and a description of its pro- 
perties. An abstract of the paper containing most of these particulars was published 
in the Atheneeum and Chemical Gazette for Mareh, and in the London Philoso- 
phical Magazine for April 1848. Notwithstanding all this, in the Comptes Rendus 
for August 1848, Messrs. Laurent and Gerhardt describe this very compound with 
exactly the same properties, and obtained in precisely the same way, without so much 
as ever hinting that it had been previously discovered. Messrs. Laurent and Ger- 
hardt, however, give a different formula for the compound, which I am also disposed 
to adopt, as on repeating my analysis of it I find I had somewhat over-estimated the 
amount of bromine contained in it, while its other constituents were determined 
correetly enough. The following are the results of the corrected analysis of brom- 
orcine : — 
I. 0'361 grin, substance dried in vacuo gave 0*5628 Ag Br=0*2395 Br = 66*34 per 
cent. Br. 
11. 0*3615 gave 0*565 Ag Br=0*2404 Br=66*50 per cent. Br. 
III. 0*281 gave 0*438 Ag Br=0*1864 Br = 66*33 per cent. Br. 
0*264 substance dried in vacuo, and burned with chromate of lead, gave 0*227 car- 
bonic acid and 0*0367 water. 
Brom- orcine. 
Found numbers. 
Calculated numbers. 
per cent. 
I. 
II. 
III. 
14C 
1050*00 
23*27 
23*44 
5H 
62*50 
1*39 
1*54 
3Br 
2998*89 
66*47 
66*34 
66*50 
66*33 
40 
400*00 
8*87 
8*68 
4511*39 
100*00 
100*00 
The rational formula of brom-orcine is therefore Ci 4 H 5 Bi *3 04 , or oreine in which 
three equivalents of hydrogen are replaced by bromine. 
The following is the composition of anhydrous orcine : — 
0*349 grm. orcine dried in vacuo over S 03 for some weeks, and burned with chro- 
mate of lead, gave 0*8675 carbonic acid and 0*205 water. 
Calculated numbers. 
C 14 1050*0 
per cent. 
6775 
Found numbers 
67*80 
H 8 
99*8 
6*44 
6*52 
0 4 
400*0 
25*82 
25*68 
1549*8 
100*00 
100*00 
Beta-orcine. 
The London Philosophical Magazine for July 1848 contains a description of a 
compound to which I have given the name of beta-orcine, from the great analogy 
