"was written of this same black birch. Some of these trees are sixty or seventy feet high, and all are very graceful, this species being considered the most beautiful of the numerous birch family. The leaves, which are just coming out, are two or three inches long and about half as wide; they taper to a point and have serrate, or sawlike, edges. The wood is firm and durable, and is much used for cattle-yokes as well as for bedsteads and chairs. The large trees yield a great quantity of sweetish sap, which makes a pleasant drink. The trees are tapped just as the sugar-maples are, and in some parts of the country gathering this sap, which is sometimes used to make vinegar, is quite an important event."