Exotic Conifers in Britain. 



339 



were very rough and branchy, and about 1896 all the branches 

 to a height of 30 to 35 feet were pruned off. No thinning has 

 taken place since 1887. 



On July 20th, 1888, Professor Schlich* made a careful 

 estimate of the volume of the growing stock. By counting 

 and measuring the diameter of all the trees on T 4 ¥ acre, he 



arrived at the following result, in terms of an acre : — 



Diameter 



Number 





Diameter 



Number 





at 4fcft. 



of Trees 



Total Sectional 



at 4 i ft. 



of Trees 



Total Sectional 



from 



of 



Area at 4 £ ft. 



from 



of 



Area at 4^ ft. 



Ground. 



each 





Ground. 



each 







Diameter. 







Diameter. 













Inches. 





Square Feet. 



Inches. 





Square Feet. 



4 



3 



•26 



12 



20 



23-56 



5 



12 



1 -64 



13 



35 



32-26 



6 



3 



•59 



14 



17 



18-17 



7 



7 



1-87 



15 



20 



2 4 \54 



8 



10 



3'49 



16 



8 



IT 17 



9 



17 



7-5i 



17 



2 



3-15 



10 



15 



8-i8 















11 



33 



2178 



Total 



202 



I58-I7 



The average sectional area is thus 783 ft., equal to a 

 diameter of 12 inches. 



An average tree was felled, and gave the following dimen- 

 sions : — 



Diameter at 4! ft. from ground 1 1 -78 inches. 



Sectional area... ... ... ... ... ... -757 sq. ft. 



Total height ... ... ... ... ... ... 60 feet. 



The tree was found to measure 3 inches in diameter at 48 

 feet from the ground, and there it was cut through. It was then 

 divided into eight sections of 6 feet each, each of which was 

 measured with the following result : — 



No. of Section. 



Length of Section. 



Mean Diameter of 

 Section. 



Volume of Wood in 

 each Section. 





Feet. 



Inches. 



Cubic Feet. 



1 



2 

 3 

 4 

 5 

 6 



7 



8 



6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 



12-5 

 io-o 



95 

 8- 5 

 70 

 6'5 

 5'o 

 3*5 



3-27 



2'95 

 2-36 

 i'6o 

 i'38 

 0 82 

 040 



Total 



48 





17-89 J 



* Trans. Royal Scottish Arbori cultural Society^ Vol. xii, p. 226. 



D D 2 



