32 



TRANSACTIONS OF ROYAr. SCOTTISH ARBORICULTURAI, SOCIETY. 



the first .season ranges from 3 inches up to 15 inches; the 

 average of the growths made by six trees in one line is 10 inches. 

 When clearing this plateau for replanting, a number of young 

 hardwoods were left from which to select specimens to be 

 exhibited at the Society's forestry exhibition at Cupar in July 

 191 2, or to be cut out later if this appeared to be necessary. 

 Five oaks so left made an average growth, in 191 2, of 2 feet; 

 seven ash, an average growth of 20 inches ; six beech, an 

 average growth of 21 inches; and seven sycamore, an average 

 growth of 12 inches. 



Taking six trees of each of European larch, Scots pine and 

 spruce growing on the bank, and comparing the growths made 

 by these in each of the last four years with the growths made by 

 the same kinds of trees of similar ages growing near, but not in 

 pit-bank material, the average results in inches are as follows : — 



The illustrations Nos. 4, 5 and 6 are photographs of the roots 

 of trees lifted for exhibition to show the rooting of the plants. 

 Extensive root action appears to be favoured by the free, loose 

 material of the bank. 



' The larches here measured are growing around those illustrated in Fig. 2. 

 - The larches and Scots pine here measured are growing on the steep bank 

 illustrated in Hg. 3. 



