Aug. 20, 1917 



Relation of Soil Water Movement 



421 



here also the movement in the other tube later became as rapid. The 

 table includes the data on these two soils, later averaged in Table XVIII 

 to show the influence of parallelism of experiment. The concordance of 

 the data on the rise in a soil appears to depend more upon the exposure 

 of the two tubes at the same time than upon the compacting of the soil in 

 the same manner. In general the divergence was greatest when the soils 

 were used in the most moist condition. Hgwever, on the whole, the data 

 would appear to justify the comparison of the data from the third experi- 

 ment with those from the first and second. 



Table XVIII. — Rise in tubes of soil with the lower end immersed in water kept at a 

 constant level. In the three experiments, I , II, and III, the initial moisture content of 

 the soil mass was, respectively, 0.5, i.o, and 1.3 times the hygroscopic coefficient. The 

 data are arranged so as to show the relation of the rate of rise to the initial moisture 

 content 



Time. 



Hours 



I 



2 



3 



4 



24 



48 



72 



96 



120 



144 



168 



192 



216 



240 



Soil A. 



Experi- 

 ment 

 III. 



Cot. 

 18 



Soil B. 



Experi- 

 ment 

 III. 



Cm. 

 16 



38 



Soil C. 



Experi- 

 ment 

 I. 



Cm. 



Experi- 

 ment 

 II. 



Cm.. 

 18 



24 

 28 

 30 

 51 



Experi- 

 ment 

 III. 



Cm.. 



Soil D. 



Soil E. 



Soil F. 



24- 



48. 

 72. 

 96. 

 120 

 144 

 168 

 192 

 216 

 240 



4-. 

 24. 

 48. 

 72. 

 96. 

 120 

 144 

 168 

 192 

 216 

 240 



Soil H. 



19 

 26 



31 

 36 

 73 

 95 

 109 

 119 

 128 

 134 

 J 40 

 14s 



107 

 118 

 126 

 134 

 139 

 144 



102 

 104 

 108 

 no 



38 

 78 

 102 

 116 



Soil I. 



