Relation of Nonavailable Water to Hygroscopic Coefficient 113 
from the bottom. The leguminous plants were transferred, soil 
and all, and placed on this subsoil. Then more of the moist H O 
subsoil was parked firmly around and on the top of the trans- 
ferred black soil. Then the whole was covered with two inches 
of air-dry H O subsoil. After the transplanting the cylinders 
were kept in a cool, partly shaded room until July 6. when they 
were so placed in a pit in the greenhouse that the tops of the 
in u I 
Prosopis velutina and Acacia Greggi Prosopis velutina 
Acacia constricta 
Fig. 37. Desert legumes in 2-foot cylinders when growth had ceased. 
cylinders projected from two to three inches above the level of 
the ground. Xo water was added. The plants showed no sign of 
injury from the transfer and afterwards all made considerable 
growth. 
The three cylinders carried the following : 
I. Three plants of Prosopis velutina. 
II. Four plants of Acacia Greggi. 
III. Three plants of Prosopis velutina and one plant of Acacia 
constricta. 
