80 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
vidual organism? If not, then plants are much better endowed 
in this respect than animals, as all of us must know from personal 
experience. One knows, however, from observation and experi- 
ence, that plants of rank growth are more liable to suffer from 
early autumn frosts than those which close their vegetative 
period fairly early in the season. 
Another point which should, I think, be noted, is that young 
plantations of extremely rapid growth at first do not necessarily 
thrive later on. I know a case in Hampshire where the growth 
of a larch plantation was extremely rapid for 8 or g years, 
then suddenly the whole plantation became attacked with canker 
and had to be entirely cleared. The same occasionally occurs 
with Scots pine on land that has been under farm-crops. A very 
interesting article in the Zestschrift fiir Forst- und Jiégdwesen for 
March 1906, describes how a young Scots pine-wood which had 
grown remarkably quickly on farm-land suddenly became infested 
with Fomes annosus and then with Agaricus melleus at about 
20 years of age. As the subsoil was similar to that in the 
surrounding woods that were not thus affected, there is a strong 
probability that the sudden loss of constitutional vigour was due 
to something connected with the surface-soil and its former 
manuring, although these had undoubtedly been the cause of 
the rapid growth during the early years of the plantation. 
A Forestry Exhibition has been held during this year at 
Nuremberg, concerning the many interesting exhibits in which 
some remarks may perhaps be made elsewhere. 
