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Updated: June 12, 2025
This tannin, fortunately, will not dissolve in water except by prolonged boiling or steeping; so that if tea is made by pouring boiling water over the tea leaves and pouring it off again as soon as it has reached the desired strength and flavor, and coffee by being just brought to a boil and then not allowed to stand more than ten or fifteen minutes before use, no injurious amounts of tannin will be found in them.
The decomposition of the earthy and alkaline sulphates, and their transition to the state of sulphurets, may no doubt favour this disengagement in many littoral and marine plants; for instance, in the fuci: but I am rather inclined to think that the rhizophora, the avicennia, and the conocarpus, augment the insalubrity of the air by the animal matter which they contain conjointly with tannin.
Most of our native wines, however, are generally sold after the second racking in March, and a great many even as soon as clear in January. These will seldom occur, if the wine has been properly treated. Cases may arise, however, when it will become necessary to rack the wine, or fine it by artificial means. The cause of this is generally a want of Tannin.
It has been known since 1872 that microbes, bacilli, and bacteria could live in very strong solutions of carbolic alcohol, and that the dilute mineral acids, tannin, chloride, corrosive sublimate, and others would kill them. In 1883 cholera did not arise alone in Egypt from filth, but from importation.
The finer and more delicately flavored brands are from the young leaves, shoots, and flowers of the plant; while the coarser and cheaper are from the old leaves, stalks, and even twigs the latter containing the most tannin, which, as we shall see, is the most injurious element in tea. Coffee is made from the seeds of a cherry-like berry growing upon a shrub, or low tree, on tropical hillsides.
Barebone hoisted the great lug-sail, that smelt of seaweed and tannin. There was a sleepy breeze blowing in from the cooler sea, to take the place of that hot and shimmering air which had been rising all day from the corn-fields. He was quicker in his movements than those who usually handled these stiff ropes and held the clumsy tiller. Quick and quiet for once.
Ye blundering idiot!" he whispered, "she's a half-breed. Och! But's time y'r eastern greenness was tannin' a good western russet! Let her follow with bowed head, or you'll have the whole pack on y'r heels!" With that admonition I strode boldly out, she behind, humble, with downcast eyes like a half-breed girl.
Here, also, we must refer to the observation that leaves exceptionally exposed to the light are relatively rich in tannin.
A Chinese being interviewed for the Cook says: Drink your tea plain. Don't add milk or sugar. Tea-brokers and tea-tasters never do; epicures never do; the Chinese never do. Milk contains fibrin, albumen or some other stuff, and the tea a delicate amount of tannin. Mixing the two makes the liquid turbid. This turbidity, if I remember the cyclopædia aright, is tannate of fibrin, or leather.
As a matter of fact, this operation must have had a good effect upon the animal; for this gum, being very rich in tannin, was certain to brace the tissues and muscles; but the first sensation of it seemed to distress the poor beast, who ran along lifting up his legs in a very comical fashion.
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