330 NOTICE OF CHELIDONINE AND PIRROPINE. 
parency and become brownish. Acids act slightly on them 
when cold, but with heat dissolve them — assuming a golden 
yellow or reddish color. If these crystals are in contact with 
a strong acid, they likewise become of a fine fiery red. 
These combinations are, for the most part, but little soluble 
in cold water, and have a taste but slightly bitter, but acrid and 
pungent. 
Pirropine dissolves with difficulty in cold ether or alcohol, 
but readily when boiling. The fixed and volatile oils dissolve 
it by the aid of heat. Exposed to heat it fuses, burns and 
gives off ammoniacal vapors. Tincture of iodine precipi- 
tates the acetate of pirropine of a crimson color; chloride of 
gold of a brownish yellow; chromate of potassa, of a deep yel- 
low, tartrate of antimony, chloride of iron, protonitrate of mer- 
cury, bi-chloride of mercury and nitrate of silverof a yellowish 
white. Alkalies produce a white precipitate. Tincture of 
galls, and subacetate of lead, effect no change. The alcoholic 
solution does not exhibit an alkaline re-action. 
J. de F. 
Journ* de Chim. Med. 
