. Bulletin. Forests and forestry -- United States. 86 J'OREST INFLUENCES. The range is exagQerated in tlie glade as comi>avelain by 0°.3G. The niiiiitua are also exaggerated in the ])lain hy (K'.54, but it ai)pears that in this ease the niaxininin is reduced. The disajjpearance of this feature of glade temperatures is doubt less dne to the large size of some of the glades, and also to the high latitude of the , giving a low latitude to the meridian sun. The relatively large reduction of the maxima causes the mean temper- ature of the glade to be 0^.30 loMer than that of the plain.
. Bulletin. Forests and forestry -- United States. 86 J'OREST INFLUENCES. The range is exagQerated in tlie glade as comi>avelain by 0°.3G. The niiiiitua are also exaggerated in the ])lain hy (K'.54, but it ai)pears that in this ease the niaxininin is reduced. The disajjpearance of this feature of glade temperatures is doubt less dne to the large size of some of the glades, and also to the high latitude of the , giving a low latitude to the meridian sun. The relatively large reduction of the maxima causes the mean temper- ature of the glade to be 0^.30 loMer than that of the plain. It ajtpears, therefore, that the glade climate is l)y a small (iuantity more rigorous than the climate of open plains. The forest tends, in so far, to exagger- ate or sharpen the diurnal changes of temperature. Fig. 45 also shows the values of W—G and W—P for soil tempera- tures at the depths of 20 inches and of 5 feet. Tlie temperatures are slightly higher under plains; G — F at both depths = +0°.l. Fig. 40 shows the monthly values of ^y-G, W-P, and G-P. The. MINIMA. MEAN. MAXIMA. Plfi. 4C.—Differences of ;iir- ti'iii])erataire in , glade, ami ]il!iiii (Swedisli). stations are not necessarily the same for the three figures nor the same as for the i)receding. Tlie first curve is of the same character as the temperature figures in the j^receding sections, and shows the same gen- eral features. The cooling etfe(;t is much more marked in the spring than lias been the case with any examined before. The second shows an exaggeration of the features of the first, except for tiie line of minima, and these ai)pear in si)ring and summer to be much the same in forest and 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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