Stránka:book 1913.djvu/436

414 The Book of Woodcraft light, soft, weak, straight-grained, not durable; a cubic foot weighs 25 lbs. Its roots afford the wattap or cordage for canoe-building and camp use generally. North to the limit of trees east of Rockies, south to Dakota, Wis. & Maine. Hemlock {Tsuga canadensis) Evergreen; 60 to 70 feet high; occasionally icxi; wood pale, soft, coarse, splintery, not durable. A cubic foot weighs 26 lbs. Bark full of tannin. Leaves | to | inch long: cones about the same. Its knots are so hard that they quickly turn the edge of an axe or gap it as a stone might; these are probably the hardest vegetable growth in our woods. Wis. to Nova Scotia and south on the mts. to Georgia. Balsam Tree or Canada Balsam (Abies balsamea) Evergreen; famous for the blisters on its trunk, yielding Canada balsam which makes a woodman's plaster for cuts or a waterproof cement; and for the exquisite odor of its boughs, which also supply the woodmen's ideal bed. Its