12 



BULLETIIsr 816, V. S. DEPARTMENT OE AGRICULTURE. 



Among those available are some that will grow under extremely 

 trying conditions. Kinds can be found that will thrive wherever it 

 is suitable for human beings to live. If it is impossible to grow trees 

 on a street, as a health measure that street should be closed for 

 human use until conditions are so improved that it will support 

 trees. 



More kinds will thrive under suburban conditions where only a 

 small portion of the roadway is covered by an impervious coating, where 

 the parking spaces are liberal, and where the street is lined with 



Fig. 10.— a business center relieved by a parking with Carolina poplars. 



PI 5298 HP 



Macon, Ga.; late summer. 



open lawns than under the conditions in a city, where the street is 

 covered with a water and air proof coating and the sidewalks with 

 an impervious material, where parking spaces are limited, and where 

 adjoining lawn areas are small or lacking. By a careful selection of 

 kinds, all conditions in a city can be met. In some places bad condi- 

 tions could have been improved greatly by a little forethought; in 

 others, such conditions can be bettered. These details, like many 

 other matters connected with city planning, have been ignored, but 

 should be considered immediately, especially by villages and small 

 cities. Figure 6 shows how an opportunity for creating a beauty 

 spot has been lost sight of, while figure 10 shows how a city has 

 utilized less ground to increase the comfort and attractiveness of its 

 business center. 



A common mistake in ambitious young cities and many old ones 

 is to pave more of the width of the street for traffic purposes than is 



