Astringent

Definition and stakes

Hugh Smith,  A treatise on foreign teas

“ Thus galls, bark, rhubarb, camomile tea, &c. &c. are all bitter and astringent. It is, therefore, the immoderate use of such an astringent that ultimately relaxes and debilitates: like the too frequent bracing of a drum, or any other stringed musical instrument, destroys its tensity, the body is unnerved by the overstretching of its fibres. ”
Source: Gutenberg

Portrait of John Ayrton Paris John Ayrton Paris,  Pharmacologia

“ ASTRINGENTS. Substances which, when applied to the human body, corrugate and condense its fibres, and at the same time, exert a tonic influence through the medium of its living principle.
Astringency in any substance may be at once recognised by the organs of taste; its power in corrugating the papillæ of the tongue, and in imparting a sensation of harshness and roughness to the palate, being too peculiar to be mistaken
”
Source: Gutenberg

Frederick William Headland,  The Action of Medicines in the System

“ Although this class of Astringents is a small and comparatively unimportant class, yet it is necessary to separate it from all the others, because the medicines which compose it are completely distinct in their mode of operation. They do not necessarily act in the blood, although many Hæmatics are also astringent. They do not pass from the blood to the nerves. They do not always act by passing out of the body through the glands. Their operation is peculiar, but it is simple. As Neurotics act directly on nerve, so these act directly and especially on muscular fibre. ”
Source: Gutenberg

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