70 



THE WATER-SUPPLYING POWER OF THE SOIL 



Examination of tables 3 to 8 brings to light several apparently 

 important points. In the first place, it should be remarked that there 

 are much wider variations in temperature in these experiments than is 

 to be desired; no doubt the differences in temperature ranges between 

 the several series of observations make up one of the important com- 

 plexes of uncontrolled and unanalyzed conditions. Nevertheless, as 



Table 7. — Numerical data for two tests with osmometer A, operating against soil mixture with 

 10 per cent of soil moisture, on basis of dry volume, unpacked (11. 4 per cent on dry weight 

 basis in first test and 7.6 per cent in second). 



No. of 



hour 



period. 



Hourly ratea per 



10 sq. cm., for 



15-min. periods. 



0.12 

 0.09 

 0.09 

 0.09 



0.06 

 0.09 

 0.12 

 0.06 



0.06 

 0.09 

 0.09 

 0.12 



0.03 

 0.09 

 0.09 

 0.09 



0.06 

 0.09 

 0.06 

 0.12 



0.09 

 0.09 

 0.06 

 0.03 



Second 

 test. 



c.c. 

 0.16 

 0.19 

 0.16 

 0.12 



0.09 

 0.06 

 0.09 

 0.12 



0.12 

 0.06 

 0.12 

 0.09 



09 

 09 

 06 

 06 



06 

 16 

 06 



0.09 



0.12 

 0.09 

 0.06 

 0.03 



0.12 

 0.09 

 0.09 

 0.06 



0.12 

 0.06 

 0.03 

 0.09 



0.09 

 0.03 

 0.06 

 0.06 



Average houriy 

 rates. 



First 

 test. 



0.23 



0.10 



0.08 



0.09 



0.06 



0.08 



0.08 



0.08 



0.07 



Second 

 test. 



0.16 



0.09 



0.10 



0.08 



0.12 



0.08 



0.09 



0.08 



0.06 



Average hourly 

 temperature. 



First 

 teat. 



"C. 

 24.0 



23.9 



24.2 



24.8 



25.6 



26.4 



27.3 



28.1 



28.4 



Second 

 test. 



26.4 

 26.7 

 27.2 

 27.7 

 28.3 

 28.8 

 29.4 

 29.9 

 29.7 



