34-0 



Exotic Conifers in Britain. 



The top and branches measured 50 cubic feet, say — 



50 X '15 = 7*5 cubic feet of solicl wood. 



These figures are calculated by Dr. Schlich to give a total 

 volume of wood, exclusive of top and branches, of 3,738 cubic 

 feet per acre. The trees being four years old when planted, had 

 reached an age of nearly 32 years on July 20th, 1888, so that 

 the increment, apart from thinnings and branches, was 117 cubic 

 feet per acre per annum. 



By the courtesy of the Earl of Mansfield I have been able to 

 bring the statistics of this interesting wood up to date by 

 measurements taken by Mr. Pitcaithley on June 22nd, 1903, 

 Two typical areas each of T \ acre were selected and the trees 

 counted and measured. The results are given in the accom- 



panying table : — 



Sample Area No. 1. 



Sample Area No. 



2. 



No. of Tree. 



Diam eter 

 at 4^ ft. 



Sectional Area 

 at 4| feet. 



No. of Tree. 



Diameter 

 at 4.^ feet. 



Sectional Area 

 at 4J feet. 



Inches. 



Square Inches. 



Inches. 



Square Inches. 



I 

 2 



3 

 4 



I 



7 

 8 



9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 



17 

 18 



II'I 

 I2'0 

 127 



137 

 I5'0 



15-6 

 15-9 



i8'i 

 18-3 

 i8' 5 

 18-6 



18- 9 



19*3 

 i9'o 



19- 9 

 2cri 

 21-8 



96-8 

 1I3-I 

 1267 

 H7"4 

 1767 

 183-8 

 191-1 

 198-6 



257 j 

 263-0 

 268-8 

 271-7 

 280-5 

 292-5 

 3017 

 311-0 



3I7-3 

 373 2 



I 



2 



3 

 4 

 5 

 6 



7 

 8 



9 

 10 



12 



!3 



14 

 15 

 16 



17 

 18 



19 

 20 

 21 

 22 

 23 

 24 

 25 



6- 5 



7- 0 



7- 2 



8- o 



9- 6 

 io-8 



I2'0 



12- 3 



I2'4 



13- 5 



I4 'S 



14- 8 



15- 0 



15-8 



15- 9 



16- 5 



16- 9 



17- 0 



i7'4 



18- 0 

 181 

 18-5 



18- 6 



19- 9 . 



20- 5 



33*2 

 38-5 

 4o-7 

 5o-3 

 72-4 

 91*6 

 113-1 

 118-8 

 1 20 -8 

 143 2 

 165-1 

 172-0 

 1767 

 196-1 

 1986 

 213-8 

 224-3 

 227-0 

 237-8 

 254-5 

 257*3 

 268-8 

 2717 

 311-0 

 33Q-I 



Total Sect. Area in sq. in. 



„ „ ,1 sq. ft. 



Per Acre 

 Average Sect. Area per 



tree in sq. in. ... 

 Do. in sq. ft. 



4, 171 2 

 29*0 

 290* 



2317 

 i-6 



Total Sec. Area in sq. in. 



„ „ „ ,i sq. ft. 



Per Acre 

 Average Sect. Area per 



tree in sq. in. 

 Do. in. sq. ft. 



4,327-4 

 30-0 



300 



1731 



I "2 



Average sectional area per tree on both sample Areas = 197-6 sq. inches. 



„ „ „ „ „ ,» = 1-372 sq. feet. 



