This balsam gives the tree a fragrant odour when the leaves are unfolding.
Microscopic sections of some of the more coherent clays and shales may be prepared by saturating them with Canada balsam by long boiling, and slicing the resultant mass in the same manner as one of the harder rocks.
He began his experimental work in 1841 with investigations of oil of turpentine and tolu balsam, in the course of which he discovered toluene.
Several other pines are found, and among the less important timber trees are black spruce, Carolina balsam, beeches, ashes, sycamore or button wood, sweet gum and lindens.
The balsam fir and in the south the red cedar occur in scant quantities; more widely distributed, but growing only under marked local conditions, is the yellow or Alaska cedar, a very hard and durable wood of fine grain and pleasant odour.