UVA URSI, OR BEARBERRT. 
89 
ing tincture was of a dark green colour, and when evapo- 
rated to the consistence of a syrup, globules of a fixed oil 
floated on its surface, and on the sides of the dish a brown- 
ish matter was deposited, consisting of tannin, extractive 
and resin. After removing the fixed oil, the extract was 
treated with water, which dissolved the tannin, and extract- 
ive, leaving an undissolved portion, consisting mainly of 
resin and chlorophylle ; soluble in alcohol and ether, and 
insoluble in acids. The watery solution of the extract was 
largely precipitated by tincture of muriate of iron. 
2d. Uva Ursi when treated with ether by displacement, 
affords a deep green tincture, which leaves a greenish ex- 
tract by evaporation, composed of tannin, chlorophylle, 
resin, and fixed oil. The extract, treated with water, is 
deprived of tannin, and the filter absorbs the oil, leaving the 
resin coloured with chlorophylle on the filter. 
3d. Two ounces of Uva Ursi were macerated with acidu- 
lated water for twelve hours. The liquor was then strained 
and the residue boiled for twenty minutes three successive 
times in a pint of water. It was then displaced with water 
until it passed off nearly colourless and tasteless, and after- 
wards with alcohol until it ceased to remove any portion. 
It was then dried and weighed one oz., showing about 
fifty per cent, of lignin. This was without taste or odour, 
yery brittle, readily decomposed with sulphuric acid, form- 
ing a thick black mass. 
4th. Six oz. of Uva Ursi having been bruised and mace- 
rated in water for six hours, were then transferred to a re- 
tort placed in a sand bath ; a solution of common salt was 
added, and a receiver adapted. The distillation continued 
for five hours. There was about a pint condensed in the 
receiver during the operation. The liquid in the retort was 
of a dark brown colour, but that which passed over was 
colourless ; a light coloured oil collected in globules on the 
surface of the distilled liquid, having a very pleasant odour. 
