Cow Tree. This tree, which has been named Galactodendron, and appears to belong to the family of Saptoteæ, grows on rocky declivities, on the northern Andes. Its leaves are large, oblong, thin, dry, and coriaceous. “Its thick ligneous roots scarcely enter the rock; for several months in the year, rain scarcely waters its fanshaped leaves. The branches appear dry and dead. But when an incision is made in the trunk, a sweet and nutritious milk runs from it. It is at sunrise that the vegetable liquid runs most abundantly. Then the natives and negroes are seen to come from all parts, provided with vessels to receive the milk, which becomes yellow, and thickens at the surface.—This vegetable milk possesses all the physical properties of the milk of animals, only it is a little thicker, and mixes easily with water. When boiled, it does not coagulate, but a thick yellow pellicle is formed on the surface. Acids do not form with this milk any coagulum as with that of the cow.”— Humboldt.