114 
BULLETIN 1059, U. S. DEPARTMENT OF AGRICULTURE. 
hold the vapor under high pressure. The effect of this is seen in 
diagram 7, where some of the t} 7 pical results are illustrated. In 
Table 5 is shown only the absorption for four periods, eliminating 
this period of general loss. Except this period, the exposure in the 
14 
IS 
DIAGRAM 7 
MOISTURE ABSORPTION IN VAPOR 
BY FINE SAND AND OTHER SUBSTANCES 
WITH FINE SAND 
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— 


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40 
60 
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00 J 
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cellar has been at temperatures between 0° and 10° C, which, it 
will be noted, are lower than have previously been employed. 
For several of the soil types duplicates were run. The results. 
however, are so nearly identical in each pair that only the averages 
need be given. 
Table 5. — Absorption of water vapor by Nebraska fine sand, and modifications 
thereof. 
[Basis 100 grams dry matter in 2Hnch aluminum can.] 
Num- 
ber 
of | 
sam- 
Description of sample. 
Absorption at end of— 
5 
davs. 
10 
days. 
63' 
days. 
days. 
100 per cent fine sand, unwashed 
100 per cent fine sand unwashed half-size J 
100 per cent fine sand, washed 2 
90 per cent fine sand, 10 per cent very fine sand 
90 per cent fine sand, 10 per cent silt and clay 
80 per cent fine, 10 per cent very fine, 10 per cent silt and 
clay 
90 per cent fine sand, 10 per cent fine limestone soil 
90 per cent fine sand, 10 per cent calcium carbonate 
99 per cent fine washed sand, 1 per cent KN0 3 3 
98 per cent fine washed sand, 2 per cent KN O 3 
97 per cent fine washed sand, 3 per cent KNO 3 
98 per cent fine sand, 2 per cent ground decayed wood . . 
96 per cent fine sand, 4 per cent ground decayed wood . . 
Per cent. 
0.56 
.68 
.57 
.51 
.97 
.93 
.72 
.71 
.74 
.75 
.73 
.87 
1.15 
Per cent. 
0.58 
.68 
.62 
.59 
1.10 
1.07 
.85 
1.07 
1.03 
.99 
1.33 
Percent. Percent. 
0. 68 0. 80 
.72 1.08 
.69 ' .79 
.64 .89 
1.33 ' 1.59 
1.37 
.96 
1.55 
2.88 
3.20 
3.01 
1.13 
1.64 
1.72 
1.27 
2.05 
7.75 
11.69 
13.77 
1.61 
1.68 
i To indicate effect of volume and depth on rale of absorption. 
1 Washed with 5 volumes of distilled water. 
i Potassium nitrate applied in solution, and water evaporated before starting the test. 
