. Bulletin. Forests and forestry -- United States. 58 A PRIMER OF FORESTRY. land, whether liat, hilh^, or tnountainous, and the char- acter of the surface covering. These are all connected with the temperature in a special manner. Lastly, it is affected b}^ the winds and the moisture of the atmos- phere. Now, it is clear that of all these factors of climate the forest can influence only the wind, the moisture, and the surface covering; but heat (with. Fig. 39.—The forest cover. Oregon, which the curface covering has so much to do), mois- ture, and wind are the three things which change when we


. Bulletin. Forests and forestry -- United States. 58 A PRIMER OF FORESTRY. land, whether liat, hilh^, or tnountainous, and the char- acter of the surface covering. These are all connected with the temperature in a special manner. Lastly, it is affected b}^ the winds and the moisture of the atmos- phere. Now, it is clear that of all these factors of climate the forest can influence only the wind, the moisture, and the surface covering; but heat (with. Fig. 39.—The forest cover. Oregon, which the curface covering has so much to do), mois- ture, and wind are the three things which change when we say that the weather changes. These are just the points where a change due to the forest would have most effect on daih^ life. The influence of the forest is exerted upon them in two ways: First. The forest cover intercepts the rain and the rays of the sun, checks the movement of the air, and reduces the radiation of heat at 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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