100 ELEMENTARY FORESTRY. 
hopelessly injured. However, trees that to the novice may seem 
hopelessly crooked may only have crooks in them that will be 
outgrown in a few years. 
STREET TREES. 
Success with Street Trees'is perhaps more dependent on 
good soil about the roots than on any other one factor. If the 
land is so very sandy or gravelly as to be subject to drouth, at 
least two cubic yards (two full two-horse loads) should be taken 
from where each tree is to be planted and the same amount of 
good clay or loam substituted for it. If in subsequent years the 
trees outgrow the limits of the material supplied, more of it 
should be added, and if this consists largely of stable manure, 
so much the better, provided it does not come into contact with 
the roots of the trees. It is important to do this work thor- 
oughly, for one tree well planted is better than a dozen poorly 
set out. 
Kinds of Trees. The best trees for street planting in this 
section are the White Elm, Hackberry, Green Ash, Basswood, 
Boxelder and Soft Maple. All of these trees do well in good 
soil, and with the exception of the Soft Maple they all do well 
in rather inferior land. Evergreens may sometimes be used to 
advantage along narrow drives, but they are seldom desirable as 
street trees. The trees planted should be about two to four 
inches in diameter near the ground, eight or ten feet high, and 
of thrifty growth. Much larger trees are sometimes set out, but 
it is not advisable, as a rule, to plant those that are over four 
inches in diameter. Smaller trees are often planted and do well 
if properly cared for, but need more attention in directing their 
growth than those that are larger. But small, thrifty trees are 
much better for street planting than large stunted trees. In all 
cases it is more important to have plenty of good roots than a 
large top, as a top can soon be developed if the roots are good. 
Distance Apart. The distance between trees depends on 
the kind planted and the quality of the land. On rich land in 
this section the trees named should be put forty feet apart, in 
fairly good soil about thirty feet, and in poor soil twenty feet 
apart. This gives sufficient room for good development, but 
where a quick effect is wanted it is a good plan to set the trees 
