328 ANNUAL REPORT 



and think of the number destroyed by horses, and killed or injured 

 by the rays of the sun, and through neglect, I am convinced it is 

 true. The police of Washington are required to watch the trees, 

 and report when any are injured, or the boxes broken. 



THE BEST VARIETY OF TREES TO PLANT. 



The white elm is the tree of all others for our streets, and yet I 

 would recommend that a few streets be planted with the soft 

 maple, the linden and the box-elder. It is a mistaken idea that 

 the elm is a slow grower; I admit that it is for the first two years 

 after re-planting, but at the end of ten years it will have obtained 

 a growth as large as any tree we can plant, except the poplars. 

 The maple, if properly protected from the rays of the sun, and kept 

 well headed in the first two years, will make as good a shade tree 

 as can be planted. It will withstand the force of the winds as well 

 as the elm, as I can convince anyone who will take a ride with me 

 through the city. 



The box-elder is rather a coarse tree, but it can be trained into 

 such symmetry, and it puts forth its leaves so early, that it is a 

 favorite with some- The linden is a beautiful, clean tree, but does 

 not do well in our sandy soil, will give great pleasure and satisfac- 

 tion. 



My experience and what I have learned from others who have 

 had life-long experience in tree planting, leads me to say to you: 

 Do not plant trees over three inches in diameter. Do not try to 

 grow tops until you have roots to "sustain them. Do not plant a 

 tree in a small hole dug in the sand and expect it to grow. Do 

 not plant a tree unless you place a hitching post near it, as the 

 most careless man will drive a few feet past his destination, if he 

 sees a post to hitch to, rather than hitch to a tree. Do not plant 

 trees too near together; place them at lerffet thirty feet apart; forty 

 is better. Do not plant two varieties on one street. Lastly, when 

 you do plant a tree, give it as much attention as you would a hill 

 of corn it will be almost sure to live. 



TEMPERATURE OF TREES. 



In a bright winter day two thermometers suspended oi' opposite 

 sides of the same tree, one in sunshine, the other in the shade, will 

 indicate a difference of more than one hundred degrees — a most 

 trying ordeal for organized vegetable tissues. 



JOHN A. WARDER. 



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