COMMENTARY. The plan of our present work prohibits us from entering into an exposition of the general literature of this subject, but we think this the less necessary as in another work, to which we have often referred in this part of our Commentary, we have given an elaborate disquisition on the ancient Ales, into which we have condensed all the information which we could procure respecting them. We would also beg leave to refer to Gruner’s learned annotations on Zozimus Panopolita (De Zythorum Compositione); to Ludovicus Nonnius (De re Cibaria, iv, 15); Eustathius (Comment. in Iliad. xiii, 640); and Athenæus (Deipnos. x, 67, ed. Schweigh.) Our proper business now is to state the opinions of the medical authorities with regard to their medicinal powers. Dioscorides mentions two kinds of ale or beer, in his Mat. Med., both of them prepared from barley, but does not state wherein the difference between them consisted. The Zythus, he says, is diuretic, apt to affect the kidneys and nerves; peculiarly calculated to prove prejudicial to the membranes of the brain; is flatulent; engenders depraved humours, and occasions elephantiasis. Of the Courmi, he also says, that it occasions headache, forms bad humours, and is hurtful to the nerves; he adds, that drinks of this nature are also formed from wheat, in Spain and Britain (ii, 109, 110.) See further, Pliny (H. N. xxii, 82.) Aëtius, Oribasius, and our author, copy almost verbatim from Galen. Rhases treats of the Zythus, by the name of _foca_, first quoting the chapter of Dioscorides on the Zythus, and then adding, upon the authority of an Arabian writer, Bimasuy (Mesue the elder?), that ale prepared from barley, cloves, and rue, is prejudicial to the head; but that prepared from fine bread (similago?) mint, and parsley, forms good chyle, and is good for the stomach (Cont. l. ult. i, 306.) Avicenna’s account of Zythus, which he also describes by the name of _foca_, is entirely made up of extracts from Dioscorides and Rhases. (ii, 2, 272.) Serapion, as far as we can discover, does not treat of this article. A liquor is treated of pretty copiously by Symeon Seth, under the head of _Fucas_, which, as his editors remark, is probably a corruption of Posca. In his account of it, he introduces a short sentence from Dioscorides’s chapter on Zythus, to the effect that “ivory steeped in it becomes as ductile as wax.” It was not, strictly speaking, an ale or beer, being merely a mixture of vinegar and water, rendered more agreeable to the palate by some aromatics. See Harduin ad Plinii (H. N. xix, 29.) Respecting this beverage Seth states, as his own opinion, that it is wholesome, especially when used by persons of a hot temperature of stomach; that it quenches thirst; whets the appetite; increases the alvine and frequently the renal discharge. Ζύμη,