90 Forestry Quarterly. 



Percentically expressed. 



A calculation of the value obtained for these variously-aged 

 stands, adding all materials at their market price, gave the follow- 

 ing results. 



61-70 71-80 81-90 91-100 100-121 121-140 



Total value per acre, 741 953 1056 1156 1150 1158 



" cubic foot, 10.8 11.6 11.7 1 1.9 12.6 13.1 



Value per cent, increase per acre, 2.5 1 0.9 



The decrease in material product in the older stands is ac- 

 counted for by loss of trees by rot and storm ; the sinking value 

 per cent, shows that the use value of this timber does not grow 

 with age, the wood merchant paying for 95 year old wood, the 

 higher price for stouter material being merely called forth by 

 lack of supply. The rapid change in price for logs from 6 to 

 9 inch, and still more from 9 to 12 inch and a smaller rise to 14 

 inch, while that over 14 inch does not rise appreciably, shows that 

 the market prefers the sizes from 9 to 14 inches diameter. Be- 

 tween the 70 and 90 year evidently the most favorable distribution 

 of sizes is found, 60% falling into the most desired classes, and 

 30% into the stouter full valued material, so that the 80 year 

 rotation would appear most satisfactory. A soil rent calculation, 

 in which the costs of stands is figured at $17 and annual adminis- 

 tration at $1.20 would also warn against a higher rotation. 



The author then elaborates the silvicultural advantages of the 

 Saxon method of small felling acres and the managerial advan- 

 tages of clearing followed by planting, both of which have been 

 proved by long experience. Whatever may be said of other 

 species as regards the preference of natural regeneration, the 

 spruce in Saxony does not promise good results ; the mother 

 stand is endangered by winds ; the soil before the crown cover is 

 interrupted for regeneration covered with dense moss or with a 

 deep layer of raw humus and litter ; after opening, grass develop- 



