Where are our chief studies of Bryonia found ? Hahnemann's Materia Medica Pura, Austrian Society's Provings, British Journal of Homoeopathy , Vol. XXV., Hirschel's Pharmacodynamics, Dunham's Materia Medica , and Hartmann's Practical Observations . Where do we obtain this great polychrest ? It grows along hedge-rows in Europe ; the tincture is prepared from the fresh root, dug before flowering time, in the same manner as described under Aconite , and imported ; its common name is Wild Hops . What is the physiological action of Bryonia ? It seems to act on all serous membranes and the viscera they contain. The general character of the pain here produced is a stitching , tearing, worse by motion, better by rest. Mucous membranes are all dry. Its acts prominently on synovial and muscular tissue, producing arthritic and rheumatic inflammations and swellings. It especially affects the right side. What is its general homoeopathic applicability ? A great polychrest, indicated in all forms of disease, especially when associated with catarrhal and rheumatic symptoms. Give five pervading characteristics.