OF FARM TIMBERS 



more below the top of the tank during treatment, and (4) 

 can be readily heated. Any metal tank of convenient size 

 which will satisfy these requirements will do the work. It 

 is advisable to have a false bottom in the tank for the timber 

 to rest on. The heating may be accomplished by a fire be- 

 neath the tank or by means of steam coils, if steam is 

 available. If an open fire is used care should be taken to 

 prevent the oil slopping over the side of the tank and taking 

 fire. This is the reason for having the top of the oil a foot 



FIG 5. AN EXAMPLE OF ORDINARY DECAY. Such decay of wood at 

 joints and in exposed places can be entirely prevented by proper preservative 

 treatment. 



below the top of the tank. While the oil is not dangerously 

 inflammable, and ordinary care will prevent trouble, care- 

 lessness may result in the loss of the oil and the timber. The 

 treatment should, of course, be made in a situation where an 

 accidental fire will not endanger any buildings. 



Eleven 



