174 APPENDIX. 
in amylic aleohol or chloroform with a very marked greenish fluor- 
escence. An alcoholic solution of the alkaloid did not crystallize, 
and we failed in obtaining distinctly crystalline salts. A solution 
of the alkaloid in dilute sulphuric acid afforded with alkaline 
carbonates and hydrates a bulky white precipitate ; but even after 
repeated precipitation and re-solution, the physical characters of 
the alkaloid were not materially altered, and its solution in amylic 
alcohol or chloroform still showed a marked fluorescence. A solution 
of the alkaloid in dilute sulphuric acid, when agitated with animal 
charcoal, completely lost its bitterness, the solution being at the same 
time completely decolourized. The alkaloid could be again separated 
from the charcoal by treatment with warm alcohol, the physical 
characters being unaltered. 
The following colour reactions were noted, pure brucine being 
tested at the same time as a control :— 
: S Alkaloid suspected to 
Reagent. Brucine. be nia 
Cone. sulph. acid con-| Pink ... ie ...| Yellow. 
taining a trace of 
c acid. ~ 
Cone. hydroc. acid ...) Colourless ... ou ».| Yellow. 
Acetic acid .., ...| Colourless .., oh ...| Yellow. 
one. nitric acid _.,.| Scarlet, soon passing into) Scarlet, does not become 
yellow. low soon 
Oo A . 
Sulph. acid and bi-| Yellow, with tinge of red .. | slight purple, not unlike 
chromate of potash. the — reaction, but 
not 
Sulph. acid and MnO?.| Orange aan Sie | viotet, rome to dark 
own. 
Chlorine Red ; colour soon smoot ig Red — not so soon 
aiccivabintsh by ,amm rged, decolourized 
mmonia. 
nitrate, on sana colour Yellow on. weer but 
with slight excess) pert on standing. no pink colour 
0 
Mayer’s reagent os ger i Aegaheas ppt., floe- — yellowish ppt., floc- 
i 
Nitric acid and SnCl?. Purple aischar ged by excess No purple colour. 
f both 
Sulphuric acid and) Red, aie es soon into Red, with greenish-purple 
potassium nitrate, x 
yellow tint at the onset: red 
colour deepens on stand- 
: a in ng. 
Sulphocyanide of po- hy oe he Sips as in excess of, White ppt., sol. in excess 
a d, repptd. by| of acetic acid, repptd. by 
NaHiO. NaHo. 
