. Bulletin. Forests and forestry -- United States. 78 A PKIMER OF FORl^:STRY. There is danger from forest fires in the dry portions of the spring- and summer, but those which do most harm usually occur in the fall. At whatever time of the year they appear, their destructive power dej^ends very much on the wind. They can not travel against it except when burning up hill, and not even then if the wind is strong. The wind may give them strength. Fig. 73.—a clearing in Spruce timber. The great cost and difficulty of such clearing is well illustrated. In the foreground is a tield of potatoes. Olymp
. Bulletin. Forests and forestry -- United States. 78 A PKIMER OF FORl^:STRY. There is danger from forest fires in the dry portions of the spring- and summer, but those which do most harm usually occur in the fall. At whatever time of the year they appear, their destructive power dej^ends very much on the wind. They can not travel against it except when burning up hill, and not even then if the wind is strong. The wind may give them strength. Fig. 73.—a clearing in Spruce timber. The great cost and difficulty of such clearing is well illustrated. In the foreground is a tield of potatoes. Olympic Forest Keserve, Washiugton. and speed by driving them swiftly through unburned, inflammable forests, or it may extinguish the liercest fire in a short time by turning it back over its path, where there is nothing left to burn. In fighting forest fires the wind is always the first thing to consider, and its direction must be carefully watched. A sudden. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Division of Forestry. Washington : G. P. O.
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