15 



sprayed with water containing Paris green or London 

 purple, their leaves are rendered proof against any very 

 serious injury, and when it is possible to employ a suita- 

 ble spraying pump this treatment is to be strongly rec- 

 ommended for all such enemies of trees. With young 

 trees there need be no difficulty. These can be easily 

 sprayed from the ground, or by mounting a barrel or 

 tank, with force pump attached, on a wagon or cart. 



Fig. 4. The improved Nixon Climax pump, for spraying. 

 The outfit for spraying orchards commonly used 

 answers very well also for this purpose. When large 

 trees are to be sprayed, strong pumps must be used, 

 together with a sufficient length of hose and some means 

 of elevating the distributing nozzle. It is a common 



