42 THE AFFORESTATION OF SURPLUS LAND. 



The following returns may safely be counted on : 



Returns of one Acre of Larch Wood. 

 Thinning at the age of Net 



20 years = 20 cubic feet quarter 



girth measure- 



Returns of on>' Arre of Ash Wood. 



Thinning at the age of shillings. 



30 years = 60 cubic feet at 10(7. = 50 



Ditto, 40 ^ 150 ,, Is. Or/. = 150 



Ditto, 50 = 220 ,, .., la. 2</. = 257 



Ditto, 60 270 ,, Is. -id. = 360 



Final yield, 70 = 2,100 Is. Gd. == 3,150 



Returns of one Acre of Scotch Pine Wood. 

 Thinning at the age of shillings. 



30 years = 40 cubic feet at 3d. = 10 

 Ditto, 40 150 ,, ,, 4d. -- 50 



Ditto, 50 ,, 330 ,, 5d. = 137 



Ditto, 60 380 ,, ,, Qd. - 190 



Ditto, 70 400 ,, Id. -- 233 



Final yield, 80 ,, 4,300 ,, Sd. == 2,866 



Returns of one Acre of Spruce Wood. 



Thinning at the age of Shillings. 



40 years = 40 cubic feet at M. = 10 



Ditto, 50 160 ., 4rf. = 53 



Ditto, 00 ,, 300 5d. 125 



Ditto, 70 400 ,, Gd. -- 200 



Ditto, 80 ,, 400 ,, ,, Id. = 233 



Final yield, 90 ,, = 6,300 ,, 8d. = 4,200 



