CAPILLAEY MOVEMENT OF SOIL MOISTURE. 
67 
Table 46. — Horizontal movement 
of soil moisture in Riverside 
soil. 
Time 
in 
days. 
Initial moisture. 
10 per 
cent. 
15 per 
cent. 
20 per 
cent. 
1 
2 
3 
4 
5 
7 
10 
12 
16 
19 
21 
24 
29 
40 
46 
49 
51 
54 
Inches. 
0.75 
1.25 
1.50 
Inches. 
4.00 
5.50 
6.25 
Inches. 
5.75 
7.00 
8.25 
9. 25 
9.75 
10.75 
1.83 
7.50 
3.00 
9.50 
13.50 
15.00 
5.00 
5.25 
11.00 
16. 25 
13.25 
17.75 
19.50 
23.25 
5.50 
18. 25 
19.00 
23.50 
19.25 
with the Riverside soil, with 10, 15, and 20 per cent moisture in the 
wet soil. The table shows, like the preceding ones, that the rate and 
extent of movement of the moisture varies as the initial percentage 
of moisture in the wet pack. There 
is also shown the rapid moisture 
movement for the first few days and 
a slowing down of this rate with 
lapse of time. These data if plotted 
would also give a curve of a para- 
bolic form. It is surprising to find 
so great an extent of movement 
of moisture in a horizontal direc- 
tion when compared with the down- 
ward movements as shown in Table 
42. If the difference in movement 
of moisture in the several boxes 
as representing the upward, down- 
ward, and horizontal can be attrib- 
uted only to gravity, and this ap- 
pears to be true, then gravity is a 
most important factor in the capil- 
lary distribution of soil moisture. 
While the experiments above noted are not sufficient in number 
to warrant any final conclusion, in connection with many others 
not contained in this report they indicate the probably distribution 
of moisture. 
These data are in accord with results obtained by others (7), (9), 
(10), (18). 
DISTRIBUTION OF MOISTURE IN BOXES CONTAINING WET AND DRX SOIL. 
It is interesting to observe the distribution of the moisture through- 
out the entire length of the soil in the boxes at the termination of the 
experiments. • It is interesting to observe the movement of moisture 
in quantity from the wet soil into the air-dried soil, and in the verti- 
cal boxes to note the relative percentages of moisture moved upward 
and downward. Table 47 gives the distribution of moisture at the 
end of the experiment in the soil boxes just previously discussed. 
In Table 47 are given the kind of soil and the initial percentage 
of moisture contained in the wet soil as placed in the boxes at the be- 
ginning of the experiment. The percentages of moisture and the 
distances inclosed between the heavy lines in the body of the table 
show the original wet area of soil in the boxes and the remaining 
figures outside of the heavy lines show that part of the original air- 
dried soil with the corresponding percentages of moisture found at 
the end of the experiment. For instance, in the first two columns the 
first two lines indicated by minus 5 inches and- minus 2 inches repre- 
