COMMENTARY. The writers on phlegmon treat immediately afterwards of herpes and erysipelas. Fabricius ab Aquapendente, Dr. Bateman, and most of our modern authorities on this subject, are of opinion that the _ignis sacer_ of Celsus and the other Latin authors was herpes. Scribonius Largus, however, distinguishes the ignis sacer from zona, which, he says, was called herpes by the Greeks. The ignis sacer of Octavius Horatianus likewise appears to be erysipelas. And Isidorus states decidedly that the ignis sacer was erysipelas:—“Erysipelas est quam Latini _sacrum ignem_ appellant, id est, _execrandum_, per antiphrasin. Siquidem in superficie rubore flammeo cutes rubescunt. Tunc mutuo rubore quasi ab igne vicina invaduntur loca ita est etiam febris excitatur.” (See a learned dissertation on the ignus sacer in Burman’s edition of Serenus Samonicus, ‘Poet. Latini Minores.’ ii, 335.) Having thus stated the doubts which prevail respecting the ignis sacer of the ancients, we shall return to Celsus’s account of it, which certainly, as already mentioned, seems to apply to herpes. He describes two varieties of it. The first is reddish, or a mixture of redness and paleness, and in it the skin is covered with a great number of small pustules. The disease spreads, the part first affected either healing, or becoming ulcerated from the rupture of the pustules and discharging a humour intermediate between sanies and pus. The breast and sides are mentioned as being frequently the seat of this complaint, and hence Bateman concludes that it is the herpes zoster. The second variety is described as consisting of a superficial ulceration of the skin, broad, somewhat livid, but unequal; the middle part healing as the extremities spread, and the part about to become affected becoming swelled, hard, and of a colour compounded of black and red. It affects principally old and cachectic persons, especially their legs. We cannot understand what could have led Dr. Bateman to think that this is the same as the herpes circinatus of his arrangement. Rayer rather supposes it to be the _dartre squameuse centrifuge_ Alibert. His general treatment consists of abstinence, opening the belly, food intermediate between the glutinous and saltish, and if there is no fever, exercise, austere wine, and the like. The ulcers (vesicles?) are to be washed with hot water, or, if they spread, with hot wine; they are then to be opened with a needle, and dressed with applications for eating away putrid flesh. When the sore is cleaned, gentle applications are to be used. For the zona or herpes, Scribonius Largus recommends applications containing alum, galls, chalcitis, misy, quicklime, &c. Pollux defines herpes to be inflammatory and pungent pustules, which spread most commonly about the neck, but sometimes affect also the hands and feet.