142 
SELECTED ARTICLES. 
some mere variety in the period of collection or other 
circumstance in vegetation ; and thirdly, the vesicular tex- 
ture so different from the compact uniform texture of Pipe 
Gamboge, is exactly what might be expected from the process 
of wetting the exuded juice, beating it up with other pul- 
verulent substances, and then drying it. It might be objected 
that eleven per cent, of foreign matter is a small addition for 
an adulteration. But this amount may, after all, be quite 
equivalent to the grower's profit from the pure article; and 
it will presently be seen, that a larger proportion of adultera- 
tion may so dilute the yellow tint of the mixture as to render 
it almost unmarketable. 
" We cannot doubt that the resin of Cake Gamboge pos- 
sesses the same effects on the body with that of the Pipe 
variety. So that this topic may be passed over. 
" 3. The Coarse Gamboge of some English druggists is 
classed by others with the Cake variety, and I apprehend 
correctly, since chemical analysis shows that it is nothing else 
than the lowest quality of that kind. I have received two 
specimens from an experienced London druggist, under the 
name of Coarse Gamboge, one of which represents very 
nearly the external characters and composition of what has 
been described above as Cake Gamboge, while the other, 
which is greatly harder, more earthy in its fracture, and 
grayish-yellow in tint, both in mass, in powder, and in emul- 
sion, evidently owes these differences to nothing else but a 
larger proportion of the same, or at least a similar adulterating 
ingredient. The composition of these specimens was as 
follows for 100 grains: — 
First. Second. 
Resin, dried in the oil bath at 380'', 
61.4 
35.D 
Arabin, dried at 212°, 
17.2 
14.2 
Fecula, dried at 212°, . 
7.8 
19.0 
Lignin, dried at 212°, 
7.8 
22.0 
Moisture disengaged at 350°, 
7.2 
10.6 
Total, 
101.4 
100.8 
