THE SELECTION OF TREES. 53 



soil-humidity need be feared, or else on very meager, dry 

 soils, where most shady trees would refuse to grow, and 

 one must make a virtue of necessity. 



5. The mixing in of the light -foliaged trees in single in- 

 dividuals is preferable to placing them together in 

 groups, unless special soil conditions make the occupa- 

 tion of certain spots by one kind, which may be better 

 adapted to them, more desirable, as for instance, the Ash 

 in a wet ground (slough). When a slower-growing, light- 

 needing kind is to be grown side by side with the quicker- 

 growing shady one as for instance, Oak and Catalpa 

 a group of Oaks will have more chance to withstand the 

 shade of the densely foliaged Catalpa than the single in- 

 dividual." 



The late Dr. John A. Warder, who was the first man 

 in America to make an effort at developing a system of 

 forestry adapted to this country, expressed his hopes, that 

 we would in the course of time come to an expedient pro- 

 cess for the care of our forests, dependent upon the correct 

 answers of the question : Which trees should be planted 

 in mixed groups, and which trees are obnoxious to one 

 another ? He observed that it is necessary to know re- 

 specting each of this species: 



1. The term of rotation of trees. 



2. The height attained by the trees at maturity. 



3. The rapidity of their growth. 



4. What trees should never be grouped together. 



5. What trees are exclusive, and should be planted in 

 masses by themselves. 



6. Which require the protecting care of nurses. 



From all this, appears the urgent necessity of estab- 

 lishing experimental stations in those parts of our 

 country which are in need of the helping hand of the 

 forester. 



As far as my own experience in this State goes, I can 



