CAPILLARY MOVEMENT OF SOIL MOISTURE. 53 
Flume No. 32 (15° down) : 
?/=21.44 t r<°- 59 — (0.026a? 1 - 92 — 11) 
Flume Xo. 3-1 (30° down) : 
?/=22.24^ - 62 
Flume Xo. 39 (15° up) : 
y=!8Mx°- 2S 
Flume Xo. 31 (horizontal) : 
y=21.S9a> *— (0.43a? 1 - 06 — 5.5) 
Flume Xo. -43 — (vertical up) : 
y=16.75d°- 19 
The following equations were found for other flumes and soils : 
Flume Xo. 33 (15° down) Riverside heavy decomposed granite 
loam (Placentia loam) Riverside. Calif. 
y—6.1x+21.— (18.25s-°- 85 ) 
Flume Xo. 61 (15° up) Dublin clay loam, near Whittier, Calif.: 
?/=0.21^+23.T- (lo.os- - 19 ./-) 
Flume Xo. 51 (horizontal) Dublin clay loam, near Whittier, 
Calif. : 
2/=11.23 t r - 37 
Fhime Xo. 59 (15° up) Dublin clay loam, near Whittier, Calif.: 
y=lo.21x°-' 2S 
Flume Xo. 40 (15° up) Riverside heavy decomposed granite 
loam (Placentia loam) Riverside, Calif.: 
?/=20.53.Z' - 31 
Flume Xo. 30 (horizontal) Riverside heavy decomposed granite 
. loam (Placentia loam) Riverside, Calif.: 
y-20.S9x 0A7 
Flume Xo. 35 (30° down) Riverside heavy decomposed granite 
loam (Placentia loam), Riverside, Calif, (for values of x 
greater than 8, curve is straight line) : 
y=7.3x+12 
These equations could be used to determine the position of the 
moisture at some time beyond the range of observation of the experi- 
ment if it is assumed that the curve law does not change for higher 
values of x. 
Dr. R. H. Loughridge, in the Report of the College of Agriculture 
of the University of California for the years 1892, 1893, and part of 
1894,. pages 91 to 100, gives the observed position of moisture in a 
column of Ventura County tilled soil (silt loam). These observa- 
tions extended for a period of 195 days, which is one of the longest 
periods that has been reported in literature. The formula ?/=13.9z - 24 
represents the movement of this moisture and there is no change in 
the curve throughout the period of observation. Values of y calcu- 
