When yellow bile, unmixed with any other humour is fixed in a part, the affection is called herpes: but if it is thicker and rather acrid it ulcerates the whole skin as far as the subjacent flesh, and is called herpes exedens; but if it is thin, less acrid and hot, it raises small blisters on the surface of the skin like millet-seeds, and hence has been called herpes miliaris. According to Oribasius, a mixture of phlegm, with yellow bile, produces the herpes miliaris. Wherefore we may evacuate the whole body with cholagogue medicines, and apply cooling and desiccant things to the affected part. At the commencement, therefore, we may apply cataplasms from vine shoots, bramble, and plantain; but afterwards we may add lentil to them, sometimes with honey and polenta. And the cataplasm recommended for phlegmons from defluxion may be applied without the house-leek. But ulcerated parts are to be rubbed with trochisks dissolved in must, or in a thin and austere wine, not very old, or in a watery oxycrate. Administer also horned poppy, and similar things in water; and when these do not prove effectual, vinegar may be added. But wine diluted with the juice of plantain or strychnos is of great service, or linseed bruised and boiled in wine and oil may be applied; or Cimolian earth, mixed with the juice of strychnos may be applied by anointing: and take of litharge, oz. iv; of the juice of leeks, vij cyathi, and of the juice of beet an equal quantity, triturate and anoint. But when these ulcers have become chronic, the trochisk of Musa and that of Andron will be convenient applications.—_Another_: For herpes phlyctænodes: having triturated the dross of lead in austere wine and anointed with it, apply above it beet leaves boiled in wine, or of wax, oz. iv; of myrtle oil, oz. xvj; of the dross of lead, oz. iv; anoint with one half of wine. When it has stopped from spreading, use the cerate from the dross; or apply boiled lentil with honey. For herpes, under the skin, mix the dross of lead with the juice of levigated rue, or myrtle cerate, instead of the rue.—_Another_: Of old unwashed wool wrapped round a dead pine and burnt, dr. xij ss; of wax, dr. xxv; of the dross of lead half an acetabulum; of goat’s tallow cured and washed in water, dr. xxxj; of myrtle oil, oz. v.—_Another_: To those which spread rapidly: of the rind of the sweet pomegranate, dr. vj; of litharge, dr. vj; of unwashed wool about a dead pine and burnt, dr. iij; of wax, dr. xij; of ceruse, dr. viij; of fissile alum, dr. j; add to wine and myrtle oil. * * * * *