第55章 XVIII(1)

The Forests of Washington When we force our way into the depths of the forests, following any of the rivers back to their fountains, we find that the bulk of the woods is made up of the Douglas spruce (Pseudotsuga Douglasii), named in honor of David Douglas, an enthusiastic botanical explorer of early Hudson's Bay times. It is not only a very large tree but a very beautiful one, with lively bright-green drooping foliage, handsome pendent cones, and a shaft exquisitely straight and regular. For so large a tree it is astonishing how many find nourishment and space to grow on any given area. The magnificent shafts push their spires into the sky close together with as regular a growth as that of a well-tilled field of grain. And no ground has been better tilled for the growth of trees than that on which these forests are growing. For it has been thoroughly ploughed and rolled by the mighty glaciers from the mountains, and sifted and mellowed and outspread in beds hundreds of feet in depth by the broad streams that issued from their fronts at the time of their recession, after they had long covered all the land.

The largest tree of this species that I have myself measured was nearly twelve feet in diameter at a height of five feet from the ground, and, as near as I could make out under the circumstances, about three hundred feet in length. It stood near the head of the Sound not far from Olympia. I have seen a few others, both near the coast and thirty or forty miles back in the interior, that were from eight to ten feet in diameter, measured above their bulging insteps;and many from six to seven feet. I have heard of some that were said to be three hundred and twenty-five feet in height and fifteen feet in diameter, but none that I measured were so large, though it is not at all unlikely that such colossal giants do exist where conditions of soil and exposure are surpassingly favorable. The average size of all the trees of this species found up to an elevation on the mountain slopes of, say, two thousand feet above sea level, taking into account only what may be called mature trees two hundred and fifty to five hundred years of age, is perhaps, at a vague guess, not more than a height of one hundred and seventy-five or two hundred feet and a diameter of three feet; though, of course, throughout the richest sections the size is much greater.

In proportion to its weight when dry, the timber from this tree is perhaps stronger than that of any other conifer in the country. It is tough and durable and admirably adapted in every way for shipbuilding, piles, and heavy timbers in general. But its hardness and liability to warp render it much inferior to white or sugar pine for fine work.

In the lumber markets of California it is known as "Oregon pine" and is used almost exclusively for spars, bridge timbers, heavy planking, and the framework of houses.

The same species extends northward in abundance through British Columbia and southward through the coast and middle regions of Oregon and California. It is also a common tree in the canyons and hollows of the Wahsatch Mountains in Utah, where it is called "red pine" and on portions of the Rocky Mountains and some of the short ranges of the Great Basin. Along the coast of California it keeps company with the redwood wherever it can find a favorable opening. On the western slope of the Sierra, with the yellow pine and incense cedar, it forms a pretty well-defined belt at a height of from three thousand to six thousand feet above the sea, and extends into the San Gabriel and San Bernardino Mountains in Southern California. But, though widely distributed, it is only in these cool, moist northlands that it reaches its finest development, tall, straight, elastic, and free from limbs to an immense height, growing down to tide water, where ships of the largest size may lie close alongside and load at the least possible cost.

Growing with the Douglas we find the white spruce, or "Sitka pine," as it is sometimes called. This also is a very beautiful and majestic tree, frequently attaining a height of two hundred feet or more and a diameter of five or six feet. It is very abundant in southeastern Alaska, forming the greater part of the best forests there. Here it is found mostly around the sides of beaver-dam and other meadows and on the borders of the streams, especially where the ground is low.

One tree that I saw felled at the head of the Hop-Ranch meadows on the upper Snoqualmie River, though far from being the largest I have seen, measured a hundred and eighty feet in length and four and a half in diameter, and was two hundred and fifty-seven years of age.

In habit and general appearance it resembles the Douglas spruce, but it is somewhat less slender and the needles grow close together all around the branchlets and are so stiff and sharp-pointed on the younger branches that they cannot well be handled without gloves. The timber is tough, close-grained, white, and looks more like pine than any other of the spruces. It splits freely, makes excellent shingles and in general use in house-building takes the place of pine. I have seen logs of this species a hundred feet long and two feet in diameter at the upper end. It was named in honor of the old Scotch botanist Archibald Menzies, who came to this coast with Vancouver in 1792[23].

The beautiful hemlock spruce with its warm yellow-green foliage is also common in some portions of these woods. It is tall and slender and exceedingly graceful in habit before old age comes on, but the timber is inferior and is seldom used for any other than the roughest work, such as wharf-building.