DRAGON'S-BLOOD.
The tree caà verà, which produces the dragon's-blood, is middle-sized both as to height and bulk. Some botanists call these trees palmæ pruniferæ foliis jaccæ, but in my opinion they have no affinity whatever with palms. When a deep incision is made into their trunks, a kind of juice flows from them, resembling blood in colour and consistence, and which, when boiled on the fire, condenses into a liver-coloured rosin. Physicians complain that foreign traders sell them goat's-blood, bolo, or red Brazil wood, mixed with gum arabic, for dragon's-blood.