CAPILLARY MOVEMENT OF SOIL MOISTURE. 
25 
Table 12. — Distance moved and water used, expressed in percentages of the total 
for SO days. 
Number 
of days. 
Flume. 
20 
31 
50 
70 
90 
Water. 
Dis- 
tance. 
Water. 
Dis- 
tance. 
Water. 
Dis- 
tance. 
Water. 
Dis- 
tance. 
Water. 
Dis- 
tance. 
1 
3 
5 
10 
15 
20 
30 
Per cent. 
17 
30 
38 
53 
67 
81 
100 
Per cent. 
Per cent. 
22 
36 
42 
58 
70 
81 
100 
Per cent. 
27 
46 
56 
73 
84 
91 
100 
Per cent. 
26 
42 
51. 
67 
78 
86 
100 
Per cent. 
28 
45 
Per cent. 
18 
30 
36 
52 
64 
79 
ioo 
Per cent. 
29 
Per cent. 
17 
29 
37 
53 
67 
81 
100 
Per cent. 
21 
34 
44 
62 
74 
84 
100 
33 
42 
64 
69 
82 
100 
52 
70 
81 
88 
100 
69 
80 
87 
100 
The tables show what was to be expected, that relatively more 
water was required to advance the wetted area in the flume 1 inch 
near the end of the experiment than at the commencement of the ex- 
periment. This fact may be partially or wholly due to the loss of 
water by evaporation. However, from data secured with the vertical 
flumes it may be partially due to changes in the distribution of mois- 
ture through the length of the flumes. 
Table 13 gives the average quantity of water, in cubic centimeters, 
required to advance the moisture in the flume 1 inch for different 
periods of time. 
Table 13. — Average use of water to advance the moisture 1 inch for different 
periods of time. 
Number 
of days. 
Flume. 
20 
31 
50 
70 
90 
200 
1 
3 
5 
10 
15 
20 
30 
c. c. 
c. c. 
500 
474 
461 
488 
501 
552 
616 
c. c. 
711 
728 
c. c. 
259 
c. c. 
524 
532 
537 
545 
577 
617 
637 
c. c. 
300 
290 
305 
380 
384 
400 
413 
422 
425 
288 
300 
320 
366 
408 
764 
775 
778 
789 
345 
380 
Since these flumes are open to evaporation, more water is required 
to advance the moisture an inch as the distance from the tank 
increases. In some instances the amount of moisture required to 
advance the wetted area 1 inch at the end of 30 days is nearly double 
that required the first few days. In the heavier types of soils, as 
represented by flume 50, a more constant quantity is required during 
each of the 30 days than for the lighter soils as represented by flume 
TO. Table 13 indicates also that less water is required to advance 
