ON JUNIPERUS VIRGINIANA. 
235 
a few drops of the solution of oxalate of ammonia occasioned 
a dense white precipitate. Also, when oxalate of ammonia 
was added to the ley, immediately a dense white precipitate 
followed. A stream of carbonic acid also occasioned a whit- 
ish precipitate when passed through the ley, showing the pre- 
sence of lime in large quantity, and in a free state. 
To prove that the above formed precipitate Was not a salt 
of magnesia or soda, sulphuric acid was added to another por- 
tion of the ley, when immediately a dense white precipitate 
was thrown down, which must have been sulphate of lime, 
since the sulphates of magnesia and soda are both soluble in 
water. 
Ferrocyanuret of potassium produced no appreciable change 
in appearance when added to the ley, or the decoction made 
with water acidulated with hydrochloric acid. 
10. Two ounces of the leaves were macerated in alcohol 
for a week, when the whole was thrown into a displacement 
filter, and the liquid displaced with alcohol until it passed 
through colourless. The leaves were then boiled in three 
successive portions of water, and finally with water acidulated 
with hydrochloric acid. When perfectly dry they weighed 
nine drachms, showing about fifty-six per cent, of lignin. 
They were tasteless and inodorous, broke with a short frac- 
ture, and were readily decomposed with sulphuric acid, form- 
ing with it a black viscid mass. 
A number of other experiments were performed, but as 
nothing new was elicited, it was deemed inexpedient to re- 
cord them. 
From the foregoing experiments it is reasonable to con- 
clude, that the following substances are the constituents of 
the leaves of the Juniperus Virginiana, viz ; Gum, Tannic 
Acid, Vegetable Albumen, Bitter Extractive, Resin, Chloro- 
phylle, Volatile Oil, Fixed Oil, Lime in a free state, and 
Lignin. 
VOL. viii. — no. in. 
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