716 



AMERICAN FORESTRY 



to nourish the plants immediately after 

 planting. 



All this gives one the impression that 

 the field is clearly defined and the 

 knowledge and methods thoroughh' 

 exploited. This is not so. The field 

 is full of new problems, new methods 

 present themselves daily and the litera- 

 ture on the subject is only in its infancy. 

 Many of these problems are details 



only of special technical interest while 

 others, of vast importance, are of more 

 general interest. Such questions, as 

 what particular brand of spraying 

 material to use and how and when to 

 combat some particular insect, are 

 examples of the former, while such 

 considerations as municipal control of 

 shade trees, proper handling of wood- 

 lands in parks and on country estates, 



Spr.\ying With a Barrel Pump 

 this is a handy and serviceable method much used in both public and private work, although for city 



SHADE TREE SPRAYING THE PUMPING APPARATUS ON A WAGON IS THE BETTER ANT) MORE ECONOMICAL 



