ACTION OF RE-AGENTS ON CINCHONA. 
129 
specific gravity 0.800; 24. lime dissolved in 12 parts of water. 
The species are named according to the nomenclature of Mar- 
tius. 
CINCHONA RUBRA. 
1. Properties of the Infusion^ — Almost colourless; faintly 
wine-yellow; passing readily through the filter, with a weak 
smell of tan, and strong bitter astringent taste. 
2. Ammonia. — Reddish, gelatinous, flocky precipitate, so- 
luble in excess; after standing from \ to i hour, passing into 
pink; and after 24 hours, occupying i of the bulk of the solu- 
tion; the supernatant liquor clear, brownish red. 
3. Potash. — Same as ammonia; only the precipitate is less 
voluminous and lighter coloured. 
4. Carbonate of Potash. — Like the ammoniacal precipi- 
tate; the precipitate after 24 hours occupies only J of the bulk 
of the liquid. 
5. Iodide of Potassiuin. — Fine divided white flocks, form- 
ing in h an hour larger flocks, which after 24 hours still con- 
tinue to float. 
6. Oxalate of Potash. —-Strongly a white turbidness, 
becoming flocky in half an hour. 
7. Sulphate of Soda. — No precipitate. 
8. Sulphate of Copper. — The same. 
9. Sulphate of Iron.—Fuve light green colour, still clear 
after 24 hours. 
10. Subacetate of Lead. — White gelatinous precipitate, 
after 24 hours occupying half of the bulk of the solution. 
11. Jicetate of Lead. — Strong white turbidity, quickly 
forming flocks, occupying in 24 hours from to ^ of the bulk 
of the fluid. 
12. Chloride of Mercury. — White turbidness, quickly 
forming numerous flocks, occupying after 24 hours from \ to 
h of the bulk of the fluid. 
13. Pernitrate of Mercury. — Yellowish white turbidness 
becoming fine flocks in \ of an hour; in 5 or 6 hours settling 
into a yellowish brown gelatinous precipitate. 
VOL. III. — NO. II. 17 
