a valley of Jericho, lying along the river Jordan, not far from Gilgal; so called from Achan, the troubler of Israel, being there stoned to death.

in medicine. Trallian says it is a sore on the outside of the head, full of little perforations, which discharge a humour like ichor, whence its name. He further says, that the cævion resembles an achor; but that the mouths of the perforations are larger, resembling the cells of a honey-comb, whence the name; the matter is also nearly of the consistence of thin honey. When these diseases spread, the serum which oozes out dries, and forms a scab.—The achor differs from the favus and tinea only in the degree of virulence. It is called favus when the perforations are large, and tinea when they are like those which are made by moths in cloth. But generally by tinea is understood a dry scab on the hairy scalp of children, with thick scales and an offensive smell. When this disorder affects the face, it is called crista lactea; which, when it happens to children, if in other respects they are healthy, the best treatment, besides keeping the belly moderately lax, is cleanliness and a moderate diet; an inflame may be made, and continued till the disorder is cleared and the strength of the constitution is established, keeping the hair short and washing the head with soap fuds.—Some instances of this sort are very difficult of cure, and attended with violent itching, a pale countenance, &c., but still the same method generally succeeds in all the species and degrees of virulence. Small doses of calomel may be given as an alternative, rather than as a laxative; and the via. antin. in such doses, at proper intervals, as the stomach will easily retain. Externally, the unguent piece may be used two or three times in a week, or cream mixed with salt in fine powder. If the humour is repelled, give warm sudorifics until it return.—Writers of medical observations afford divers anomalous instances of aches, viz. Some found even in aged people; some not on the head, but the feet; others resembling the venereal disease; others which disappeared upon cutting the hair, and returned on its growing anew; others followed by a thickness of hearing; others by pannics, and others by a gutta serena. Their dying up has sometimes been followed by a fever, their repulsion inwards by an epilepsy.