Sextius adds, that the smell of burnt nasturtium drives away serpents, neutralizes the venom of scorpions, and gives relief in head-ache; with the addition too, of mustard, he says, it is a cure for alopecy, and applied to the ears with a fig, it is a remedy for hardness of hearing. The juice of it, he says, if injected into the ears, will effect the cure of tooth-ache, and employed with goose-grease it is a remedy for porrigo and ulcerous sores of the head. Applied with leaven it brings boils[1536] to a head, and makes carbuncles suppurate and break: used with honey, too, it is good for cleansing phagedænic ulcers. Topical applications are made of it, combined with vinegar and polenta, in cases of sciatica and lumbago: it is similarly employed, too, for lichens and malformed[1537] nails, its qualities being naturally caustic. The best nasturtium of all is that of Babylonia; the wild[1538] variety possesses the same qualities as the cultivated in every respect, but in a more powerful degree. CHAP. 51.—RUE: EIGHTY-FOUR REMEDIES. One of the most active, however, of all the medicinal plants, is rue.[1539] The cultivated kind has broader leaves and more numerous branches than the other. Wild rue is more violent in its effects, and more active in every respect. The juice of it is extracted by beating it up, and moistening it moderately with water; after which it is kept for use in boxes of Cyprian copper. Given in large doses, this juice has all the baneful effects of poison,[1540] and that of Macedonia more particularly, which grows on the banks of the river Aliacmon.[1541] It is a truly wonderful thing, but the juice of hemlock has the property of neutralizing its effects. Thus do we find one thing acting as the poison of another poison, for the juice of hemlock is very beneficial, rubbed upon the hands and [face][1542] of persons employed in gathering rue.