THE PLACING OF SHADE TREES 71 



planted at liberal distances apart. Because of better soil 

 and light conditions, one row usually develops more rapidly 

 and more vigorously than the other, producing a ragged 

 and uneven effect. The plan is not recommended unless 

 there is the ideal condition of abundant space. By alter- 

 nating the trees, that is, putting them first on the outside of 

 the sidewalk and then on theinside,theeffectofadoublerow 

 may be produced in a narrower space than where all 4 trees 

 are placed in a straight row across the street. See diagram. 



(3) With Center and Side Planting. This also is 

 an extension of Plan 1. It calls for one or two rows of trees 

 down the center of the street, in addition to a row on each 

 side. This type of planting is used on streets of consider- 

 able width which have no interfering car tracks. The 

 plan involves a grass-grown or gravel covered parking 

 strip in the center of the street, and the effect is extremely 

 attractive. The trees in this parking strip may be in single 

 or double line. On Pennsylvania Avenue southeast, and 

 New York Avenue northwest, of the United States 

 Capital, as well as streets in Jacksonville, Florida, New 

 Orleans, Louisiana, Augusta, Georgia, and many other 

 cities, the trees are in double line, separated by double 

 street car tracks. This particular arrangement naturally 

 calls for a great deal of space. Because of their width of 

 150 feet or more, these streets can accommodate the double 



