CAPILLAR Y MOVEMENT OF SOIL MOISTURE. 53 



Flume Xo. 32 (15° down) : 



y=21Mx°- 59 — (0.026a? 1 - 92 — 11) 

 Flume Xo. 34 (30° down) : 



i/=2-2Mx -* 2 

 Flume Xo. 39 (15° up) : 



y=18Mx°- 2S . 

 Flume Xo. 31 (horizontal) : 



y— 21.39* - 4 — (0.43a? 1 - 06 — 5.5) 

 Flume Xo. 43 — (vertical up) : 



y=16.75.x- - 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=5.1x+21.— (18.25s- - 85 ) 

 Flume Xo. Gl (45° up) Dublin clay loam, near TVhittier. Calif.: 



2/=0.21z+23.7— (15.5s-°- 19 ./>) 

 Flume Xo. 51 (horizontal) Dublin clay loam, near YThittier, 

 Calif. : 



y=11.2Sx - 37 

 Flume Xo. 59 (15° up) Dublin clay loam, near TThittier, Calif.: 



^=15.21a?°- 2S 

 Flume Xo. 40 (15 c up) Riverside heavy decomposed granite 

 loam (Placentia loam) Riverside, Calif.: 

 y=20Mz°- zl - 

 Flume Xo. 30 (horizontal) Riverside heavy decomposed granite 

 loam (Placentia loam) Riverside, Calif.: 



yr=20.89.x A47 



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) : 

 ^=7.3*4-12 



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 y=13.9,r - 24 

 represents the movement of this moisture and there is no change in 

 the curve throughout the period of observation. Values of y calcu- 



