194 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
is a dry gravel. None of the stobs were treated with any 
preservative, their points being merely charred and dipped in 
coal-tar. Mr Murray states that some of the Douglas fir stobs 
which have much sap-wood are somewhat decayed, but not so 
much so as the larch stobs, which were treated in the same 
way. Mr Murray also states that Douglas fir, like larch, does 
not creosote well. 
There can be no doubt as to the value of these exhibitions 
from an educational point of view, and it is hoped that in the 
future all members of the Society who are in a position to do 
so will co-operate with the Council in their efforts to make them 
even more valuable in this respect than they have been in the 
past. 
