No. 168.—Cincuonia. CINCHONINE. 
+: po 
_ practitioners, which have so long existed in favour of the — 
superiority of the oblongifolia (Red bark) over other spe- 
cies, that it is decidedly inferior to the calisaya (Yellow 
bark)—as the whole product of its active principles does 
not equal that of the calisaya, and cinchonine constituting 
rather more than half the product, which, according to an 
eminent author, is five times less active than the quinine.” 
The analysis of cinchona cordifolia, by the French chemists, 
yielded— 
1, Yellow, odorous adipocire. 
2. Yellow colouring matter. ; 
3. Tannin, which turns iron of a green colour. 
4. Red = cinchona, more abundant than in the red 
bar! + cs Me F. 4 4 
5. Kinate of quinine, with very little cinchonine—(the 
quinine, according to Pelletier and Caventou, 
forming 0.9 per cent. of the bark; and according 
to Voreton, 14.) 
6. Fecula. Cy 
7. Woody fibre. 2 
8. Kinate of lime. ee. Ay, 
tas Sy A E 
The analysis of cinchona oblongifolia, (R€QWatk;) yielded 
2. Yellow colouring matter. 
_ 3. Tannin. ets 
4, Red of cinchona, (very abundant in this bark.) 
5. Kinates of cinchonine and quinine—(100 parts of — 
the bark yielding 0.8 of cinchonine, and 1.7 of 
<a 
8. Kinate of lime, 
Cabinet specimen, Jeff. Coll. No. 192. 
One of the proximate alkaline principles of Cinchona—by 
which generic name is comprehended many species. It 
was detected by MM. Pelletier and Caventou,. who, at- 
tracted to the subject by the previous researches of MM. 
Laubert, Streuss of Moscow, and Gomez, were led to make 
a refined and careful analysis. This resulted in the detec- 
tion of the substance previously obtained by Gomez, which 
he had not ascertained, however, to be alkaline, as they 
did. A substance first called Cinchonin, by Dr. Duncan, 
Jun.—the letter e was added to make a euphonous ac- 
cordance with other proximate principles, obtained in the 
