. Capillary movement of soil moisture. Soil moisture. CAPILLAKY MOVEMEISTT OF SOIL MOISTURE. 43 The striking feature of Table 32 is the fact that as the flumes re- cede from the vertical the rate of movement day by day is more uni- form and more constant. In the flume iiiclmed downward at an angle of 30° the extent of movement of moisUire on the fifteenth day or one-half the time was G5 per cent of the total movement of the moisture in 30 days. In flume 32 this percentage was 68. In flume 31 or the horizontal flume it was 81 j>er cent; in flume 39 it was 83 per e&nt; and in the flume wi
. Capillary movement of soil moisture. Soil moisture. CAPILLAKY MOVEMEISTT OF SOIL MOISTURE. 43 The striking feature of Table 32 is the fact that as the flumes re- cede from the vertical the rate of movement day by day is more uni- form and more constant. In the flume iiiclmed downward at an angle of 30° the extent of movement of moisUire on the fifteenth day or one-half the time was G5 per cent of the total movement of the moisture in 30 days. In flume 32 this percentage was 68. In flume 31 or the horizontal flume it was 81 j>er cent; in flume 39 it was 83 per e&nt; and in the flume with a vertical angle of 45° it was 92 per cent. To present the above data m a more condensed form, figure 7 has been Fig. 7.—Comparison of rate of movement of moisture in flumes of various slopes; all uumes containing Riverside heavy decomposed granite loam. Also shows appearance of moisture curves from top to bottom of flumes, except Nos. 32 and 39. Figure T shows the relative positions of the moisture in the various flumes with reference to the surface of the water in the tanks at various times during the experiment. The lines on the drawing showing the direction of the flumes represent the longitudinal axes of the flumes along their center lines. The figures show the direc- tions and the paths through which the moisture from the tanks must travel along the center lines of the flumes. It is obvious that during the forepart of the experiment the lines joimng the points represent- ing the positions of the moisture on the different dates are very ir- regular. It shows that there is a tendency of the curve joining these. 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 McLaughlin, Walter Wesley. [from old catalog]. Washington, Govt. print. off.
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