In Botany, the outer skin or covering of trees, the ingredients composing which vary much in the different species, which are, accordingly, applicable to various purposes of the aits. Some are highly medicinal, as Jesuit's bark; some are used for tanning leather, as the bark of the oak and Spanish chesnut, etc.; some in dyeing, as the bark of alder and walnut trees; some afford spices, as cinnamon, and cassia lignea; and others are applicable to divers uses, as the bark of the cork tree. The Japanese make paper of the bark of a mulberry tree; and in Otaheite, a species of cloth is made from the bark of the paper mulberry tree, of the bread-fruit tree, and of the cocoa-nut tree.