It is but very lately, too, that Servilius Democrates, one of our most eminent physicians, first called attention to a plant to which he gave the name of iberis,[708] a fanciful appellation[709] only, bestowed by him upon this discovery of his in the verses by him devoted[710] to it. This plant is found mostly growing in the vicinity of ancient monuments, old walls, and overgrown footpaths: it is an evergreen, and its leaves are like those of nasturtium, with a stem a cubit in height, and a seed so diminutive as to be hardly perceptible; the root, too, has just the smell of nasturtium. Its properties are more strongly developed in summer, and it is only used fresh-gathered: there is considerable difficulty in pounding it. Mixed with a small proportion of axle-grease, it is extremely useful for sciatica and all diseases of the joints; the application being kept on some four hours at the utmost, when used by the male sex, and about half that time in the case of females. Immediately after its removal, the patient must take a warm bath, and then anoint the body all over with oil and wine—the same operation being repeated every twenty days, so long as there are any symptoms of pain remaining. A similar method is adopted for the cure of all internal defluxions; it is never applied, however, so long as the inflammation is at its height, but only when it has somewhat abated. CHAP. 50.—PLANTS WHICH HAVE BEEN DISCOVERED BY CERTAIN ANIMALS. CHELIDONIA: SIX REMEDIES. The brute animals also have been the discoverers of certain plants: among them, we will name chelidonia first of all. It is by the aid of this plant that the swallow restores the sight of the young birds in the nest, and even, as some persons will have it, when the eyes have been plucked out. There are two varieties of this plant; the larger[711] kind has a branchy stem, and a leaf somewhat similar to that of the wild parsnip,[712] but larger. The plant itself is some two cubits in height, and of a whitish colour, that of the flower being yellow. The smaller[713] kind has leaves like those of ivy, only rounder and not so white. The juice of it is pungent, and resembles saffron in colour, and the seed is similar to that of the poppy. These plants blossom,[714] both of them, at the arrival of the swallow, and wither at the time of its departure. The juice is extracted while they are in flower, and is boiled gently in a copper vessel on hot ashes, with Attic honey, being esteemed a sovereign remedy for films upon the eyes. This juice is employed also, unmixed with any other substance, for the eyesalves,[715] which from it take their name of “chelidonia.” CHAP. 51.—THE DOG-PLANT: ONE REMEDY.