The virtues of wild valerian in nervous disorders ... With directions for gathering and preserving the root; and for chusing the right kind when it is bought dry. Shewing that the uncertainty of effect in this valuable medicine, is owing to adulteration or ill management / [John Hill].

  • Hill, John, 1714?-1775.
Date:
1772
Catalogue details

Licence: Public Domain Mark

Credit: The virtues of wild valerian in nervous disorders ... With directions for gathering and preserving the root; and for chusing the right kind when it is bought dry. Shewing that the uncertainty of effect in this valuable medicine, is owing to adulteration or ill management / [John Hill]. Source: Wellcome Collection.

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    of the root In watery places; and the cer^^ tain fign of its wanting flrength. The fubftance which farrounds the pith in the Valerian root, contains its greateft -virtue. This is the Corona, or circle of propagation ^ : it is fpungy and woody in .the Water Valerian, but in the heath kind, it is firm and oily. It contains a fubftance approaching to the nature of a gum-refin; and this the watery nourifhment cannot fup- ply: it is therefore this part in the Water Valerian is fo eafily perifliable, which in the jpther is permanent. CHAP. V. Defcription of the true Heath Valerian Koot, r y HE^ TRUE Heath Valerian Root is ^ compofed of longer and flenderer fibres than the other; and is toughs and of a dujky hrown, approaching to., olive colour: the fibres are all hung with numerous threads: when broken, they have no hollow in the centre, nor any blackilh circle there, but appear full and bright; and if the root has been gathered in perfection, there is a cir- ^ See Conftrudlion of Timber by the Microfcope, octavo, 177It cl^