a botanical genus of the natural order of Composite. The English name of A. montana is Leopard's bane. It is a powerful narcotic-acrid, and has been used in medicine, especially in chronic rheumatism, and as a diuretic in atomic dropsy.

ARNISÆUS, HENNINGUS, a philosopher and physician of great reputation about the beginning of the seventeenth century. He was born at Halberstadt in Germany, and was professor of physic in the university of Helmstadt. His political works are much esteemed. The most remarkable of them is his book De Autoritate Principum in Populum semper Inviolabili, printed at Frankfort in 1612. He wrote also upon the same doctrine his three books, De Jure Majestatis, printed at the same place in 1610; and his Reflectiones Politicae, printed at Frankfort in 1615. He went to Denmark by invitation, and was made counsellor and physician to the king. He travelled into France and England, and died at Fredricksborg in 1636. Besides the pieces already mentioned, he wrote several philosophical, medicinal, and poetical treatises.