Aqua Marina, _Sea Water_, is acrid, moderately calefacient, and desiccant; it is bad for the stomach when taken in a draught, disorders the bowels, and proves phlegmagogue. If poured hot on a part it attracts and discusses. * * * * * COMMENTARY. The ancient authorities who have written most learnedly on this important, although common-place article of the Mat. Med., are Dioscorides, Avicenna, and Rhases. Sea water, says Dioscorides, is heating, acrid, and bad for the stomach, for it disorders the belly, bringing away phlegm and bile. When poured hot on a part it attracts and discusses, suiting with affections of the nerves and chilblains before they become ulcerated. It is proper for mixing with raw barley-meal, and is suitable for plasters and discutient malagmata. For evacuating the bowels it is injected in a tepid state, and for tormina in a hot. It is a suitable fomentation in cases of scabies, pruritus, lichen, enlarged tonsils, and turgid mammæ. In hot fomentations it dispels lividities, and is useful in the bites of venomous animals, such at least as induce tremblings and rigors, but especially of scorpions, phalangia, and asps, and if, in such cases, one go into a hot bath, it proves useful; and in chronic cachexiæ of the body and nerves the bath of it is useful. Its hot vapours soothe dropsies, headaches, and dullness of hearing. It is given as a purge either alone or with oxycrate, wine, or honey; and after the purging takes place the broth of a hen or of fishes is exhibited to dilute its acrimony and pungency. (v, 19.) Avicenna borrows largely from Dioscorides, but supplies some additional remarks of his own by no means devoid of interest and importance. He recommends sea water for chilblains, for killing lice, and discussing extravasated blood. He also, copying from Dioscorides, praises it in pruritus, scabies, and impetigo. Epileptics, he says, are benefited by tepid salt water, but injured by hot. The vapour of salt water, he adds, is beneficial in vertigo and dropsies. (ii, 2, 58.) From Rhases’s very lengthened dissertation on this subject we can only find room for a few extracts. Upon the authority of Johannitius (Serapion?), he states that the use of salt water to one unaccustomed to it proves laxative and pinches the belly, but to one accustomed to it, it proves astringent. Another of his authorities, Judæus, says salt water proves beneficial in pain of the head and chest, in dropsy, and a watery stomach. He also states of salt water, that although at first it proves laxative, the continued use of it brings on constipation, because, he says, its salt dries, astringes, and strengthens the belly. (Cont. l. ult. i, 70.) Θαλίκτρον, Thalictrum, _Meadow Rue_, has desiccant powers, without pungency. It therefore heals chronic ulcers. * * * * *