98 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
14 acre of mature wood; in other words he would, during the 
25 years, cut about 9 acres more than the ordinary area. In this 
way he would gradually press down his rotation from 100 to 91 
years. On the other hand, he would have another 100 acres 
planted with young woods ranging from 1 to 25 yearsold. Then, 
as the thinnings begin to yield some return, he would gcadually 
reduce his cuttings of mature wood until he has raised the rota- 
tion again to 100 years, and from that moment he would enjoy a 
considerably enhanced income, because he would then cut over 
2 acres every year, thus realising £135 a year instead of the 
previous £75. You will observe that I have based my example 
upon unfavourable conditions, because the owner need not lose the 
grazing or shooting rents all at once over the whole 100 acres. 
In this way a scheme could be worked out for every estate, 
according to its proper conditions. 
Dogs 1T Pay To PLANT? 
But we must not forget to ask the question—Would it pay 
to plant? Great difficulty is experienced in getting hold of 
reliable data regarding the receipts and expenses of British wood- 
lands. I have succeeded in securing these in a few instances, 
and they, coupled with my personal experience as a practical 
wood manager, have enabled me to show that, here in the north, 
land which is capable of producing on an average 1} ton of © 
coniferous timber per acre annually, can be profitably afforested if 
it does not yield an annual soil rental of more than 7s. 6d. per 
acre. The calculation is made with 24 per cent. compound 
interest throughout, and on the supposition that the thinnings 
are sold for pit props, and the final crop for construction, both at 
current rates. I shall, of course, not weary you with further 
details of this question, but assure you that the calculation has 
been based on moderate expectations. 
In this connection I should like to give you a few figures 
regarding the Saxon forests which I have already mentioned to 
you. The forests of Schwarzenberg have an area of 46,000 acres, 
and are situated from 1000 to 2500 feet above sea-level. The 
annual yield from them is 3,640,000 cubic feet of wood of all 
kinds. Of this 3,045,000 cubic feet are timber, equivalent to 
51 cubic feet English measure, by the quarter girth, per acre over 
the 46,000 acres of their area, The total receipts are £70,488, 
