TREES 
115 
three o’clock — hence it is the line of shadow 
between these hours that should be thrown on 
the midst of the area that it is desired to shade. 
But the other sultry hours need not be uncon- 
sidered by any means; and often a tree may be 
so placed that it will afford much more pro- 
tection than seems possible, or than would be 
possible if its shadow were required over a 
porch or door or window. The shadow, of 
course, travels around the tree; it best serves 
our purpose when the tree is so placed that it 
travels in the general direction of the expanse 
which we wish to shade. 
The kinds of ornamental tree from which 
choice may be made for the type of place to 
which we are confining ourselves are not so 
many that there need be difficulty in choosing. 
The picturesque cannot be admitted, con- 
sistently; only trees of orderly growth — the 
well behaved, conventional, and seemly mem- 
bers of the tree race — will look at home and 
harmonize with the sharply defined limits of 
suburban cultivation. Curiously enough, al- 
though we have many native to this continent 
which, properly grown, would fulfil these re- 
quirements, exotics are largely used where 
small trees are desired, Japan and China 
furnishing the most of them. There seems to 
