i8 



SOILS 



of the pond, where flowing water was uncommon, there 

 to become adjusted to their new homes and to their new 

 environment at last to be stationary in their rules of 

 living. 



It is likely the first stationary forms found lodgment in 

 the crevices of the rock, where perhaps had accumulated 

 small quantities of soil that had been made long before 

 by air and water working in unison. These plants, no 

 doubt, set their fibrous roots firmly against the rock sur- 

 faces and worked in their own way in securing the 

 coveted elements locked in the storehouse of the rocks. 



Just as the ivy of to-day creeps over stone and brick, so 

 did these first forms secure their food substances for their 

 life and growth. But with this difference: those were 

 small, insignificant plants and of low order; the ivy has 

 culture, good breeding and pedigree as its inheritance. 



Real soil was made and left. You must not think 



SOIL BUILDERS AT WORK 

 Leaves, roots stems and grass find their way back to the soil and enrich it 



