This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
The root of Atropa Belladonna Linne (nat. ord. Solanacece).
Central and Southern Europe, in woods.
In cylindrical, somewhat tapering, longitudinally wrinkled pieces, 10 to 25 mm. or more in thickness; externally brownish-gray, internally whitish; fracture nearly smooth and mealy, not radiating or showing medullary rays in the thicker roots, only in the layer near the bark; nearly inodorous; taste sweetish, afterwards bitterish and strongly acrid.
As of the leaves. Usually contains 0.2 to 0.6 per cent. of alkaloids.
Dose, 1 to 3 m.; .06 to .20 c.c.
2. Linimentum Belladonnae. - Belladonna Liniment. Fluid Extract of Belladonna Root, 950; Camphor, 50.