88 



DETERMINATION OF THE INCREMENT 



l\cc(q)iinlatu)n. 

 The stem of the tree had, at the age of 97 years 



A total vohime of = HiVlH cul:)ic feet 

 Of this was 



( = 55-15 - 51-82 = 3-33 cuhic feet 



Bark 



I = 6 per cent, of total volume. 



Leaving 



Timher (over 3" diameter) = 51-7 cul)ic feet. 

 Firewood . . . = "12 „ ,, 



Total Timber and Firewood = 51*82 cubic feet. 



CO 



O 20 



10 20 ;!0 40 50 CI) 70 80 UO 100 



AGE, IX YEARS. 



Fig 31. — Graphic representutiou of tlie Volume. 



