Cinchona. The bark of Cinchona calisaya Wed-dell, Cinchona officinalis Linné, and of hybrids of these and of other species of Cinchona (Nat. Ord. Rubiaceae) containing not less than 5 per cent of its peculiar alkaloids, at least one half of which should be quinine.

Cinchona Rubra

Red cinchona. The bark of Cinchona succi-rubra Pavon (Nat. Ord. Rubiaceae) containing not less than 5 per cent of its peculiar alkaloids.

Preparations of Cinchona

Infusum Cinchona.—Infusion of cinchona (cinchona, No. 40 powder, 60 grm.; aromatic sulphuric acid, 10 c. c; water to make up to 1,000 c. c. Dose, § ss— § j.

Extraction Cinchonae

Extract of cinchona. Dose, gr. j—gr. x.

Extractum Cinchonae Fluidum

Fluid extract of cinchona. Dose, τη x— 3 j.

Tinctura Cinchonae,

Tincture of cinchona. Dose, 3 ss—§ ss.

Tinctura Cinchonae Composita

Compound tincture of cinchona (red cinchona, bitter orange-peel, serpentaria, glycerin, alcohol, and water). Dose, 3 ss — ozss.

Alkaloids of Cinchona and their Salts

Cinchonina.—Cin-chonine. An alkaloid extracted from various species of cinchona.

Cinchoninae Sulphas

Cinchonine sulphate; occurs in hard, white, lustrous, prismatic crystals, without odor, and having a very bitter taste. It is soluble at 59° F. (15° C.) in sixty-six parts of water and ten parts of alcohol. Dose, gr. v — 3 ss.

Cinchonidinae Sulphas

Cinchonidine sulphate. The neutral sulphate of an alkaloid extracted from the bark of various species of cinchona; occurs in white, silky, acicular crystals, and is soluble at 59° F. in seventy parts of water. Dose, gr. v — 3 ss.