THE BLACK SPRUCE.
The Black Spruce is a taller and larger tree in its native forest than the white spruce; but the latter, when planted in pleasure-grounds, makes a more beautiful standard than the other, which is apt to grow scraggy and defective, like the balsam fir. There is some difficulty in distinguishing the two American species, until they have been repeatedly examined and compared, though they do not differ from each other so obviously as they both differ from the Norway spruce. In the white spruce the trunk tapers more rapidly, the bark of the recent branches is lighter colored, the cones are smaller and more elongated, the leaves have more of a glaucous hue, they are also longer and less numerous, and do not form so perfect a cylinder by closely surrounding the branch, as in the Black Spruce.
Notwithstanding their similarity, it is the Black Spruce alone that produces the essential oil for the manufacture of beer. This species is also much more valuable for its timber. Emerson remarks that the leaves and scales of all the pine family, in which are included the spruce and the fir, are so disposed as to form spirals in two directions.