194 College of Forestry 
involves forest sanitation as carried out in such slight modi- 
fications of silvicultural practice as will enable diseased trees 
to be marked for removal when the forest is thinned out or 
cut. Such procedure, in addition to improving the woodlot, 
will lead to a better utilization of our gradually waning 
lumber supply of deciduous woods, particularly of white oak. 
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