ON JUNIPERUS VIRGINIANA. 
333 
extract was undoubtedly composed of resin and chloro- 
phylle. 
6. An attempt was made to isolate chlorophylle by the pro- 
cess recommended by Dr. Turner, in his work upon Chemis- 
try, 5 Am. edit, p. 573. The leaves were beaten to a pulpy 
consistence with water, the liquid strained, and to it was 
added an equal quantity of alcohol ; after standing about two 
hours the alcohol was driven off by heat, but nothing was ob- 
served floating upon the surface of the remaining liquid. The 
experiment was then varied several times, but nothing satis- 
factory was the result. 
7. Six ounces of the leaves were placed in a tubelated re- 
tort and covered with water, in which a small quantity of 
chloride of sodium was dissolved; a receiver was adapted 
and heat applied. During the distillation the liquid in the 
retort assumed a milky appearance, but that in the recipient 
was colourless, and possessed the taste and odor of the leaves 
in a high degree. The distillation was carried on for near 
an hour, when about two pints had been condensed in the re- 
ceiver: this liquid was placed in a precipitating jar and set 
aside. Upon standing twenty-four hours there arose to the 
surface a small quantity of oil, which was carefully removed; 
it possessed the strong odor of the leaves, and a warm, pun- 
gent taste. When nitric acid was added to a portion of it 
fumes were disengaged, which were disagreeable, and did 
not possess any of the odor of the leaves. The remainder, 
when dropped upon paper, gave it a semitransparent appear- 
ance; and when the paper was exposed to the action of heat, 
the oil was volatilized, and the paper left unstained. 
8. An etherial tincture was prepared by macerating an 
ounce of the leaves in eight ounces of sulphuric ether for ten 
days, when it was of a lively green color. This was filtered, 
and placed aside for spontaneous evaporation, which required 
about two weeks. There remained in the vessel about half a 
drachm of a greenish colored oil, about the consistence of 
thin syrup; it was unctuous to the touch, and when dropped 
upon paper left a permanent greasy stain. By the addition 
