266 OUR FORESTS AND WOODLANDS 



properly adjusted and distributed regularly 

 over equally productive areas coming succes- 

 sively to each year's fall would be 



/ x 7000 (cb. ft.) x 80 ( years) 



10 (acres) x '- a i i2 '- 



^ 



= 2,800,000 cubic feet, while in the latter case 

 it would be 



8 (acres) x 8500 (cb. ft.) x 100 (years) 



2 



= 3,400,000 cubic feet. These figures may 

 perhaps suggest that the eighty years' rota- 

 tion would probably be the more profitable, 

 involving, as it does, so much less capital in 

 timber ; but, in the woods worked with the 

 longer rotation, the timber would be of larger 

 dimensions and higher market value. More- 

 over, a certain portion of the timber included 

 in the mature fall at eighty years of age will 

 likely be cut as thinnings, between eighty and 

 one hundred years, in the longer rotation ; and 

 this must of course be taken into account when 

 trying to determine which rotation is the more 

 profitable way of utilising the land. From 

 this it can also be noted how misleading it 

 may be in Forestry, as in other matters, to 

 jump to conclusions on mere primd facie ap- 



