Nov. 20, 1916 Determination of Hygroscopic Coefficients of Soils 359 
has been allowed to come into equilibrium with an only partially saturated 
atmosphere and that this method will require only simple equipment, a 
minimum of skill on the part of the operator, and be so economical of time 
as to recommend it wherever a very large number of samples have to be 
dealt with. 
LITERATURE CITED 
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(6) Hilgard, E. W. 
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( 8 ) - 
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