180 



Scotch Forestry. 



The average increase of girth per year of Larch in a specially 

 favourable locality was therefore 1.14 inches per annum. 



At Glenstriven a few other trees have also been measured in 

 the same wav. 



In our own district I have not been able to take many obser- 

 vations, but the following notes may be of interest. Thus there 

 are plantations at Monreith of both Japanese Larch and Common 

 Larch side by side. These are eight years old, and I measured 

 ten trees as a sample in each group. 



The Japanese averaged 11.5 inches in girth, showed no trace 

 of disease, and already formed a satisfactory canopy. The 

 European averaged 7.5 inches, and were without exception dis- 

 eased. Three were obviously doomed to death, whilst the canopy 

 was also very imperfect. At Kirkennan I saw a number of 

 Japanese plantations which gave the following results : — 



average girth 6 inches 



II 7 ,, 



100 ,, 



Up to the age of 27 years these results would go to show 

 that the Japanese, with an average yearly increase of 1.4 inches, 

 is far ahead of the European. At Murraythwaite also there is a 

 splendid plantation of Japanese. The control experiment of 

 European Larch, which is on the other side of the glen, has been 

 almost extinguished by disease. 



Certain Douglas Fir at Kirkennan, 23 years old, showed a 

 girth of 36 inches. Others 35 to 40 years had a bole fully 40 feet 

 long and average quarter girth of 11.25 inches. A group, 40 to 

 50 years, Avere from 19.25 to 21.5 inches quarter-girth. Picea 



