REVERSIBILITY OF THE COLLOIDAL CONDITION OF SOILS 
TaBLE 17 (concluded) 
Corrected Milligrams of 
Soil Treatment eae uae fe eeute 
of soil 
Continuously moist....| 52.9 +0.8 | 9.91+0.002 
Air-dried 1 time...... 26.0 +0.0| 9.82+0.002 
P Di a aes Si 28.9 +0.1| 9.84+0.002 
A aoe Si Lert 28.6 40.3 | 9.84+0.003 
eM DP SEER SE 28.3 +0.4| 9.84+0.003 
Dunkirk subsoil 
LOM IRE Eee 29.4 +0.3| 9.84+0:003 
SY Alen 2 Beats Nave 28.25+0.7 | 9.84+0.009 
Oven-dried once......./ 17.0 40.2 | 9.73+0.005 
pitted ss eke a 1.5 +0.0} 6.85+0.041 
Difference between 1 
aranii Bhitol GY} Olam! sadacodaue |) ooeccoceucboc 
Continuously moist....| 54.9 +1.9 | 39.90-+0.004 
Air-dried 1 time...... 54.75+0.7 | 39.90+0.000 
7 rope ne eee 54.75+0.7 | 39.90+0.000 
4 bene 61.4 +0.5 | 39.90+0.000 
Sixp.- eset 50.4 +0.8 | 39.88+0.000 
cane ante eee 81.5 +1.6| 39.93+0.000 
BO aa eKr 93.4 +2.6| 39.98-0.000 
Oven-dried once....... 24.0 +0.3 | 39.76+0.000 
Wer be dp oi ereiaiey- 0.2 +0.0 7.88+0.000 
Difference between 1 
drying and 32 dryings 
oll 
Difference 
0.09+0.003 
0.02+0.003 
0.000.004 
0.00+0.004 
0.00+0.004 
0.00+0.009 
0.11+0.010 
2.88+0.041 
0.02+0.009 
0.00+0.004 
0.00+0.000 
0.000.000 
0.02+0.000 
0.05+0.000 
0.050.000 
0.22+0.000 
31.88+0.000 
0.080.000 
These results are rather irregular, and, on the whole, inconsistent. With 
the two surface soils there is an increase in their adsorptive capacities due to 
one air-drying, a result just opposite to that obtained by the water-vapor- 
