4 BULLETIlSr 816, U. S. DEPAKTMEISTT OF AGKICULTURE. 



shaded it makes less prominent those colors that might otherwise 

 prevail and offend. 



Fig. 4.— Trees 18 years old on adjacent streets: A, Pin oaks; B, ginkgos; C, Norway maples. Note the 



differences in size. 



