242 
FALSE AND TRUE ANGUSTURA BARK. 
Decoction. 
I boiled for ten minutes the same quantity of both kinds in 
the same amount of water. I remarked that the powder of 
the true became more voluminous than that of the false. Its 
decoction was filtered with greater difficulty. 
When preserved for several days, the preparation of the 
true, preserved its color and transparency, whilst the other 
stained the sides of the glass and assumed a blackish-brown 
color. 
Chloride of Barium, 
Nitrate of Silver, 
Sulphuric Acid, 
Perchloride of Iron, 
Caustic Potassa, 
Phosphate of Soda, 
True. 
Nothing. 
Abundant yellow preci- 
pita'e. 
Yellow precipitate. 
Gray precipitate. 
Reddish yellow colora- 
tion by refraction, and 
dull green by reflec- 
tion. 
Nothing. 
Journ. de 
False. 
Cloudy. 
Nothing. 
Nothing. 
Deep green coloration, 
without precipitate. 
Greenish tint, the liquid 
remaining transparent. 
Nothing immediately — 
then deep brown colo- 
ration. 
Chimie Medicale. 
