a word of Paracelsus's, by which he would express that power of nature in the whole material world, by which species are divided into individuals.

ARETÆUS of Cappadocia, a Greek physician of the sect of the Pneumatists, lived in the reign of Augustus, according to some; according to others, under Trajan or Adrian. He wrote several treatises in the Ionian dialect, on acute diseases, and other medicinal subjects; some of which are still extant. The best edition of his works is that of Boeckhauve, in Greek and Latin, with notes, printed in 1731; that of Wigan, printed at Oxford in 1723, in folio, is also much esteemed.