Oct. 25. 191S Temperature and Capillary Moisture in Soils 



167 



At both amplitudes of temperature the percentage taken up increases 

 with the colloidal content in the soil, which is natural. 



Table IV. — Movement of moisture from a moist and warm column of soil to a dry and 

 cold column of soil and from a moist and cold column of soil to a dry and warm column 

 of soil 



Kind and temperature of soil. 



Percentage of moisture in soil. 



Quartz sand : 



At beginning of experiment 



Movement from moist column at 20° to dry column 



ato°C 



Movement from moist column at 0° to dry column 



at2o°C 



Movement from moist column at 40° to dry column 



ato°C 



Movement from moist column at 0° to dry column 



at4o° C 



Light sandy loam : 



At beginning of experiment 



Movement from moist column at 20° to dry column 



ato°C 



Movement from moist column at 0° to dry column 



at 20° C 



Movement from moist column at 40'^ to dry column 



at 0° C 



Movement from moist column at 0° to dry column 



at 40° C 



Heavy sandy loam : 



At beginning of experiment . . • 



Movement from moist column at 20° to dry column 



ato°C 



Movement from moist column at o^ to dr)- column 



at 20° C 



Movement from moist column at 40° to dr>' column 



ato° C 



Movement from moist column at o'^ to dry column 



at4o°C 



Silt loam : 



At beginning of e;xperiment 



Movement from moist column at 20° to drj- column 



ato° C 



Movement from moist column at 0° to dry column 



at 20° C 



Movement from moist column at 40'^ to drv column 



ato°C : 



Movement from moist column at 0° to drv column 



at4o°C ' 



Clyde silt loam : 



At beginning of experiment 



Movement from moist column at 20° to dry column 



ato°C 



Movement from moist column at 0° to dry column 



at 20° C 



Movement from moist column at 40° to dry column 



at 0° C 



Movement from moist column at 0° to dry colum.n 



at 40° C 



1.85 

 .0746 

 .0105 

 . 2048 

 . 0121 



6.497 



■345 

 .061 



•779 

 . 000 



9. 906 

 •592 

 .215 



•937 

 .168 



10. 89 

 .6S7 

 .411 

 i^4i3 

 •347 



15^ 349 

 .429 

 . 100 

 .S14 

 .042 



.0879 

 .02131 

 . 2210 

 . 0160 



10. 141 



•550 

 • 163 

 I. iS 

 .o3 



12.3c 



•569 

 . 211 

 1.094 

 . 169 



17.88 

 .844 

 ..461 

 1.942 

 •445 



25. 086 

 .662 

 .606 

 1-554 

 •594 



8.75 

 .1129 

 • 03912 

 .2376 

 .01522 



14. 17 

 .820 



•448 

 1.496 

 •235 



14. 695 

 .863 



•445 

 1.309 

 .150 



18.67 

 .989 



•529 



2.03S 



•438 



36.18 



. 962 

 . 900 

 2. 046 

 •852 



