RESEARCH METHODS IN 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 
DIAGRAM 9 
OSMOTIC AND CAPILLARY RELATIONS 
SOILS FROM DIFFERENT DEPTHS AT COMMON POINT 
ST A. F-2 
Graniie Gravel 
suggestion that in any such group of samples these two measures 
will vary proportionately. On the contrary, there is a decided ten- 
dency 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 
