POWER OF RETAINING WATER 



81 



of various crops ; a commencement of an investigation of this 

 kind has however been made in America. Certain typical 

 soils in various places have been left for the purpose of 

 experiment without a crop, and samples of the soil have been 

 obtained every day by boring to the depth of I ft., and in 

 these samples the proportion of water has been determined. 

 Whitney (Boils, Bulletin 3) gives the results of the mechanical 

 analysis of these soils, and also the amounts of water which 

 they contained in the months of June and July 1895. 



TABLE XII 



PHYSICAL ANALYSIS OF TYPICAL SOILS (WHITNEY) 



Percentage of Water in ift. of Soil, June and July 1895 



