wound a triangular piece oi" bark will die. For this leason it 

 is advisable that the top and bottom of the scar be pointed rather 

 than abru])t or broadly rounded. A large percentage of the bark 

 of a vigorous, young tree can be removed if necessary, without 

 killing the tree. Portions can be cut away from all sides, and 

 the flow of sap will alter its course so as to follow the living 

 bark. It has been shown that this flow of sap under extraordinary 

 conditions will deviate from a longitudinal course fully 90 degrees. 



The wounds should be painted with an antiseptic covering after 

 all traces of the mycelium are removed. This is to prevent the de- 

 velopment of insect or fungous diseases, as well as the infectioit 

 by spores of the blight which may have lodged upon the wonnd^ 

 and also to act as a waterproof covering for the wound. Very thick, 

 coal tar diluted with creosote to make it readily applicable is the 

 best combined antiseptic and cover that can be recommende*! and 

 should be used wherever possible. Other substances which can 

 be used as antiseptics only are: 



Corrosive sublimate (biclioride of me.rcuryi, in tlie i)r<)j)ortion of 

 one part of the corrosive sublimate to one thousand })arts of water. 

 Tablets of this poison are sold at all drug stores with directions as 

 to how much water to add to make the 1-1000 solution. 



Formalin, 5% solution in water. This is also a poison and must be 

 used with care. 



Either of the above antiseptics will kill any of the fungus with 

 whioh they come in contact. The cutting tools need not be dipped 

 in any solution to kill any spores which may adhere to them, pro- 

 vided the antiseptic is immediately and carefully applied to all 

 cut surfaces. 



Waterproof coverings to follow as soon as antiseptic is dry: 



1. Coal tar. 



2. Lead paint. 



3. Shellac, (of temporary value only unless renewed 



often ) . 



Or this Solution: 



4. ] gallon pine tar. 

 2 qts. rosin. 



1 qt. linseed oil. Mix thoroughly. 



lOxtreme care should be taken to collect and burn every particle 

 of the wood and bark which was cut from the infected parts of the 

 tree. This is important. The fungus will live in this bark for a 

 long time after being cut. It has been found that pieces of bark 

 cut from trees send out living spores after lying on the ground in 

 all kinds of weather for five months, and that fence rails and un- 



