CAPILLARY MOVEMENT OF SOIL MOISTURE. 
37 
rate of movement as compared with flumes 39 and 76 is more uni- 
form. The figures for flume 206 show the rapid decrease of rate of 
movement of the moisture from day to day. 
WATER USED, 
Table 24. 
Water used by flumes at different 
periods of time. 
Flume. 
Number 
of days. 
39 
58 
76 
96 
206 
Liters. 
Liters. 
Liters. 
Liters. 
Liters. 
1 
7.5 
10.5 
5.0 
11 
7.0 
3 
13.0 
15.0 
8.0 
20 
9.0 
5 
15.5 
19.0 
10.0 
27 
10.5 
10 
19.0 
23.0 
14.0 
39 
13.5 
15 
22.0 
25.5 
17.0 
48 
14.75 
20 
24.5 
28.0 
20.5 
56 
15.75 
30 
40 
50 
27.5 
31. 25 
35.0 
32.5 
36.75 
41.0 
26.25 
33.0 
40.0 
65 
! 
The amount of water used in the flumes inclined upward is greater 
than for the vertical flumes and less than for the horizontal flumes. 
The total quantity of 
water used by the flumes 
inclined at an angle of 
15° upward from the 
horizontal is given in 
liters in figure 5 in the 
small circles. Table 24 
gives the total quantity 
of water, in liters, used 
by the different flumes 
at the end of different 
periods of time. The 
same information i s 
given in Table 25, in percentages based upon the quantity of water 
used by each flume at the end of the thirtieth day. 
This table shows that the heavier soils as represented in flumes 39 
and 58 use relatively more water during the first few days of the 
experiment than do the lighter soils. In the heavier soil about the 
fourth day 50 per cent of the total quantity of water used in 30 days 
m ^ , • had been used, while for the 
Iable 2o. — Vater used, by days, in per- ,. -, , ., n 7 i i -i 
centages of total used in 30 days. lighter soils there had been used 
on the fourth day only about one- 
third the quantity used in 30 
days. 
Table 26 gives the average 
quantity of water removed from 
the tanks at different periods of 
time to advance the moisture in 
the flumes an average distance of 
1 inch. That is, in flume 39 at 
the end of the fifth day there had 
been removed from the tank 15.5 
liters of water and the moisture had advanced in the flume a total 
distance of 28.55 inches, or there had been used an average of 543 
cubic centimeters of water for each inch the moisture had advanced. 
Table 26 shows that in the lighter soils the quantity of water used 
near the beginning of the experiment was very much less than the 
quantity of water used during the last part of the experiment. In 
Flume. 
Number 
of days. 
39 
58 
76 
95 
Per cent. 
Per cent. 
Per cent. 
Per cent. 
1 
27 
32 
19 
17 
3 
47 
41 
31 
31 
5 
57 
59 
38 
41 
10 
69 
71 
53 
60 
15 
80 
78 
64 
74 
20 
90 
86 
78 
86 
30 
100 
100 
100 
100 
40 
50 
114 
124 
113 
126 
125 
152 
1 
