STBEET TREES. 



51 



Fig. 24. A " Well" constructed about an elm tree when grade 

 was raised. Photo by \Vm. Solotarofi\ 



CO-OPERATION. 



In few lines of civic work is co-operation so essential as 

 in the care of shade trees. The fact that one individual 

 ordinarily owns and controls but a fraction of the property 

 in a block makes it necessary for each owner to work with, 

 and not independently of, his neighbors. In almost every 

 community the best results will be secured through a Shade 

 Tree Commission, or a Park Board having similar authority. 





Fig. 25. Street grade raised two feet without changing sidewalk or 

 injuring trees. Practicable only on a side street. 



