CAPILLAR Y MOVEMENT OE SOIL MOISTURE, 
15 
perature corresponding to the daily and monthly variations in tem- 
perature of the atmosphere at Riverside. 
A feature of the experiments not usually included is a record of 
the quantity of water required to extend the moisture to various 
heights. 
Below is given a list of the vertical flumes and the soil placed in 
each. 
Flume 19 was filled with decomposed granite from Riverside, 
Calif. 
Flume 43 was filled, with heavy soil from Riverside, Calif. 
Flume 63 was filled with heavy clay soil from Whittier, Calif. 
Flume 80 was filled with gravel soil from Uplands, Calif. 
Flume 100 was filled with lava-ash soil from Central Idaho. 
Flume 209 was filled with sandy soil from Central Idaho. 
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Fig. 2. — Rate of movement of moisture in vertical columns of soil. The numbers within 
circles indicate the point at which that number of liters of water had been taken up. 
The moisture equivalent, in per cent, for these soils is as follows: 
Riverside, light, 7.9 ; Riverside, heavy, 11.1 ; Whittier, 38.3 ; Uplands, 
6.6 ; Idaho lava-ash, 18.3 ; and Idaho sand, 4.7. 
Figure 2 shows the curve's derived from the measurements of the 
rate of movement of moisture in the flumes and the time of such 
measurements. The vertical element is the distance measured in 
inches and the horizontal element is the time in hours or days. The 
no-tire to the left shows the rate of movement bv hours for the first 
21 hours and the figures to the right the movement by days, 
The curves are parabolos or closely resemble parabolic curves. A 
very rapid movement of the moisture occurs for the first few hours 
of the experiment. After the first few hours there is a rather rapid 
slowing down of the rate of movement and after about the fifth day 
the rate cf movement is rather uniform, growing slightly slower day 
bv dav. 
