This section is from the book "Materia Medica And Therapeutics: An Introduction to the National Treatment of Disease", by John Mitchell Bruce. Also available from Amazon: The pharmacology and therapeutics of the materia medica.
Cinnamomi Cortex-Cinnamon Bark.-The inner bark of shoots from the truncated stocks of Cinnamomum zeylanicum. Imported from Ceylon, and distinguished in commerce as Ceylon Cinnamon.
Characters.-About one-fifth of a line thick, in closely-rolled quills, which are about four lines in diameter, containing several small quills within them, light yellowish-brown, with a fragrant odour and warm sweet aromatic taste: breaks with a splintery fracture.
Impurity: Cassia bark, rougher, thicker, less aromatic.
Composition.-Cinnamon bark contains the officinal oil, as well as tannic acid, starch, sugar, and gum. The oil is readily-converted by exposure to air into cinnamic aldehyd, C9H80, and cinnamic acid, C9H802. See Styrax, page 334, and Balsa-mum Peruvianum, page 226.
Dose.-10 to 20 gr.
Aqua Cinnamomi. 1 in 8. Lose, 1 to 2 fl.oz.
Oleum Cinnamomi. The oil distilled from cinnamon.
Yellowish when recent, becoming red. Dose, 1 to 4 min.
Purvis Cinnamomi Compositus. Cinnamon, 1; Cardamoms,
1; Ginger, 1. Dose, 3 to 10 gr.
Tinctura Cinnamomi. 1 in 8. Dose, 1/2 to 2 fl.dr.
Cinnamon is also contained in a large number of preparations of other more important drugs, including the compound powders of Catechu, Chalk, and Kino.
Cinnamon, besides possessing the same action, and being used for the same purposes, as other aromatic substances (see Caryophyllum, page 242), has moderately astringent properties by virtue of its tannic acid. It is therefore the favourite flavouring and carminative agent in astringent powders, tinctures, etc. These are chiefly used in diarrhoea.