194. Mirra: i.e. myrrh; hot and dry in the second degree; it is the gum of tree that grows in India; it is best when coloured red or golden yellow; it retains its efficacy for a hundred years; it is obtained in the summer time by striking the tree with an axe, causing the gum to flow out of it. If myrrh be placed on red coals, and the fumes allowed into the mouth, this will help with a bad smell on the breath. If powder of myrrh be held under the teeth and rubbed on them, it will consolidate them and it will also make the breath good. Item, if a pill be made of storax and myrrh and held in the mouth, it will prevent migration of the rheum, and it will help with catarrh. If the same pill be put on coals and the fumes be received into the