16 THE HUMAN SIDE OF TREES 



sirable and lucrative for him to continually produce 

 lumber, but, instead of reducing some tree city to 

 a barren, burnt-over waste, he can cut the trees on 

 a selective system, leaving the younger ones to reach 

 maturity. Only such precautions will insure the 

 continuance and growth of tree cities, and tree cities 

 are the greatest assurance that man-made cities 

 will continue to grow and flourish as they have in 

 the past. 



