The small twigs, tied in bundles, are boiled for some time in water with broken biscuit or roasted grain; the resulting decoction is then poured into a cask with molasses or maple sugar and a little yeast, and left to ferment.
The nuts are again boiled, and the inspissated juice of the second decoction yields a weaker catechu of a brown or reddish colour.
The oil is obtained from the seeds by two principal methods - expression and decoction - the latter process being largely used in India, where the oil, on account of its cheapness and abundance is extensively employed for illuminating as well as for other domestic and medicinal purposes.
At one time a decoction was prepared from them and recommended in pectoral complaints.
A kind of thick paste, known as jujube paste, was also made of a composition of gum arabic and sugar dissolved in a decoction of jujube fruit evaporated to the proper consistency.
Cochineal owes its tinctorial power to the presence of a substance termed cochinealin or carminic acid, C17H18010, which may be prepared from the aqueous decoction of cochineal.
A decoction of the buds in milk or whey is a common household remedy for scurvy; and the young shoots or green cones form an essential ingredient in the spruce-beer drank with a similar object, or as an occasional beverage.
In British Honduras an alkaline decoction prepared from the Moon plant (Calonictyon speciosum) is used for the same purpose.
Writing of the Tibetan he states: "As a beverage he drinks, all day long, cupfuls of, hot buttered tea, which is really a soup or broth made by boiling tea-leaves with rancid butter and balls of dough, and adding a little salt, and straining - a decoction which was invariably nasty to our taste, though no doubt it is wholesome; for it is not merely a stimulating hot drink in the cold, but overcomes the danger of drinking unboiled water in a country where the water supply is dangerously polluted."
The well-known "Danzig-spruce" is prepared by adding a decoction of the buds or cones to the wort or saccharine liquor before fermentation.