100 
SAUCY BARK. 
bark. In this potassa was recognized by tartaric acid and 
chloride of platinum. 
Soda was evidenced by the deposition of the antimoniate 
of soda on the addition of a solution of the antimoniate of 
potassa. 
Lime was indicated by the oxalate of ammonia. 
Iron by the ferrocyanuret of potassium. 
Finally, magnesia was tested for by adding a solution of 
phosphate of soda, and, on subsequently dropping in water 
of ammonia, a crystalline precipitate consisting of the phos- 
phate of magnesia and ammonia subsided. 
With a view of isolating the principle giving activity to 
this bark, an ounce and a half was boiled with water, 
acidulated with sulphuric acid, and to the filtered liquid water 
of ammonia was added. 
The purple deposit was washed, dried and mixed with 
animal charcoal, and in this state treated with boiling al- 
cohol. On evaporating the alcoholic solution, a small 
amount of acicular crystals were obtained. 
Again, the bark was exhausted by displacement with 
alcohol, and evaporated till reduced to a syrupy consist- 
ence. 
Quicklime was now intimately mixed with it, and the 
whole permitted to remain on the sand-bath until perfectly 
dry. The powder was then boiled with alcohol, and the 
residue after the evaporation of the spirit was a few grains 
of a crystalline matter, having a white colour and nausea- 
ting taste. 
The minute amount of the products of these experiments 
did not admit of a satisfactory examination of their nature, 
but were proved to be poisonous by the effects following 
their administration to animals. 
The principle upon which M. Lebourdais has recently 
separated alkaloids from crude substances was now em- 
ployed. 
Some washed and pure animal charcoal was packed in 
