[II.] HYGROSCOPIC MOISTURE 99 



;oil sand o-oi, calcium carbonate 0-38, sandy soil 0-79, 

 sandy loam 2-37, strong clay 14-98, peat 22-66. Prob- 

 ibly the results are parallel to those obtained by other 

 ne.thods which measure something dependent upon 

 surface or upon the colloids, as, for example, the 

 lygroscopic moisture. In any case the determination 

 s by no means an easy one to make, and no sufficient 

 lumber of results have been obtained with soils of 

 mown behaviour in the field to enable one to form a 

 udgment of the value of the method. 



