...with neutral acetate of lead, and the excess of lead is removed from the filtrate by hydroeulphuric acid. The greater part of the alcohol is distilled off, and the residue is evaporated to dryness and treated with acetic acid, which dissolves the bitter principle, and leaves...

...tincture is diluted with water till it becomes turbid, decolorised by animal charcoal, and filtered ; the greater part of the alcohol is distilled off; and the residue mixed with water is heated in a water-bath, till the whole of the alcohol is driven off, after which...

...of the root-bark of Lithospermum árcense. — Extracted from the bark by alcohol containing' acetic acid. The greater part of the alcohol is distilled off, and the remainder is evaporated over the water-bath ; the black mass which separates from the aqueous residue...

...boiling alcohol, 85°. Upon cooling, the alcoholic solution deposits a considerable quantity of nitre ; the greater part of the alcohol is distilled off and the residue evaporated at 75° C. to a syrupy consistence. Upon repose Chenopodine separates in grains. An additional...

...treated with weak spirit, owing to the presence of a foreign substance, to remove which Schnedermann shakes it with warm alcohol of 60° to 65°, and precipitates...off, and the residue is poured into water, whereupon kinoviu is precipitated and may be purified as in 1 (Hlasiwetz). 3. Powdered cinchona-bark is treated...

...water, the extract concentrated by evaporation, and then treated with hot alcohol; after filtration the greater part of the alcohol is distilled off, and the residue left to itself in a cool place ; yellow crystals of berberine are then deposited, and may be purified...

...tincture is diluted with water till it becomes turbid, >lorised by animal charcoal, and filtered ; the greater part of the alcohol is distilled off; and the residue mixed with water is heated in a water-bath, till the whole of the alcohol is driven off, after which...