146 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



of ten branches in each tree and of the three internodes 

 measured : — 



The average annual growth of the branches works out at 

 the following : — 



In Wood A — 6 ins. in length and 4/8oths of an inch in diam. 

 In Wood B — 15 ' ,, 9/8oths ,, 



This difference corresponds closely with the difference in 

 height-growth of the stems, and points to a relationship. 



Thus we see that, despite a slightly closer planting distance, 

 the branch-growth of Wood B is very much stronger than that 

 of Wood A, which not only has a wider planting distance but 

 is on a steeper slope where there is more room for branch 

 •development. 



Again, the rate of growth of the branches of Wood A is less 

 than half that of Wood B, appearing to be in some way related 

 to the rate of growth of the wood. It would seem that the rate 

 of growth of the branches really depends, in the first place, 

 upon the factors of the locality, and is very slightly, if at all, 

 influenced by planting distance It would be difficult to say 

 which factor is important in this case, but the writer inclines 

 to think, from other observations made, that it is the soil 

 differences which have most influence. A north aspect on a 

 steep slope must, however, have certain disadvantages of 

 lighting. 



The most interesting point, perhaps, is that the length of 

 life of the branches in the two woods differs by two or three 



