RESEARCH METHODS i^T STUDY OF FOREST ENVIRONMENT. 117 



What in the manner suggested for interpreting the moisture data for 

 soil wells and illustrated in diagram 3. 



It will be noted on examining these diagrams, each of which rep- 

 resents the soils from various depths at a single point, that in each 

 group of soils of common origin the lines drawn to connect the 

 capillary moisture and moisture equivalent for each sample tend to 

 converge toward the axis of the system of coordinates and give the 



suggestion that in any such group of samples these two measures 

 will vary proportionately. On the contrary, there is a decided tend- 

 ency toward parallelism in the lines connecting, for each soil, the 

 wilting coefficient and the moisture content at the point of osmotic 

 equilibrium established approximately by this particular test. If, 

 for example, the last-mentioned moisture contents, which may be 

 termed the " osmotic equivalents," be taken to correspond in every 

 case to 20 atmospheres osmotic pressure, and if these be represented 



