The title St. John's Wort is given, either because the plant blossoms about St. John's day, June 24th, or because the red-coloured sap which it furnishes was thought to resemble and signalise the blood of St. John the Baptist. Ancient writers certainly attributed a host of virtues to this plant, especially for the cure of hypochondriasis, and insanity. The red juice, or "red [288] oil," of _Hypericum_ made effective by hanging for some months in a glass vessel exposed to the sun, is esteemed as one of the most popular and curative applications in Europe for excoriations, wounds, and bruises. The flowers also when rubbed together between the fingers yield a red juice, so that the plant has obtained the title of _Sanguis hominis_, human blood. Furthermore, this herb is _Medicamentum in mansa intus sumptum_, "to be chewed for its curative effects." And for making a medicinal infusion, an ounce of the herb should be used to a pint of boiling water. This may be given beneficially for chronic catarrhs of the lungs, the bowels, or the urinary passages, Dr. Tuthill Massy considered the St. John's Wort, by virtue of its healing properties for injuries of the spinal cord, and its dependencies, the vulnerary "arnica" of the organic nervous system. On the doctrine of signatures, because of its perforated leaves, and because of the blood-red juice contained in the capsules which it bears, this plant was formerly deemed a most excellent specific for healing wounds, and for stopping a flow of blood:-- "Hypericon was there--the herb of war, Pierced through with wounds, and seamed with many a scar." For lacerated nerves, and injuries by violence to the spinal cord, a warm lotion should be employed, made with one part of the tincture to twenty parts of water, comfortably hot. A salve compounded from the flowers, and known as St. John's Wort Salve, is still much used and valued in English villages. And in several countries the dew which has fallen on vegetation before daybreak on St. John's morning, is gathered with great care. It is thought to protect the eyes from all harm throughout the ensuing year, and the Venetians [289] say it renews the roots of the hair on the baldest of heads. Peasants in the Isle of Man, are wont to think that if anyone treads on the St. John's Wort after sunset, a fairy horse will arise from the earth, and will carry him about all night, leaving him at sunrise wherever he may chance to be. The plant has a somewhat aromatic odour; and from the leaves and flowers, when crushed, a lemon-like scent is exhaled, whilst their taste is bitter and astringent. The flowers furnish for fabrics of silk or wool a dye of deep yellow. Those parts of the plant were alone ordered by the London _Pharmacopoeia_ to be used for supplying in chief the medicinal, oily, resinous extractive of the plant.