PRACTICAL ARBORICULYT URE 179 
but those grown wild extend their roots to great distances and they cannot be 
saved. The sap of evergreens is resinous, and, when once dried, cannot again be 
moistened, the sap becoming hardened so it cannot flow. Never allow them to 
remain exposed to air or sun. 
Trees 18 to 24 inches high are proper size. In order to show how readily the 
cedar may be pruned into all imaginable forms, we have engraved the Italian gar- 
aen of the late Mr. H. H. Hunnewell, at Wellesley, Mass. 
This magnificent specimen of landscape architecture has been mostly if not 
entirely formed by continuous pruning with a definite object in view, of the juniper 
or cedar growing so abundantly in the vicinity. 
There are several other evergreens which may be used for snow guards, such 
as the American Arbor Vitae, which is a tree of northern regions. In fact, any 
plant which will grow on rather barren lands without cultivation, and which will 
bear shearing to dwarf its growth, may be used for this purpose. Still, as much 
of the necessity for snow protection in cuts is within the semi-arid belt, there is no 
evergreen quite so suitable as some form of the red cedar. 
