44 



THE WHITE PINE. 

 TABLE VII. Acre yield of youny pine grorei Continued. 



It would be possible to increase the number of trees that could grow per acre and develop 

 satisfactorily by attention of the forester, as will appear from the statements regarding the White 

 Pine forest plantations in Germany, where pure White Pine growths showed at sixty-eight years 

 fetill over six hundred and seventy trees, and in another place at eighty-two years seven hundred 

 and twenty-three trees, and at one hundred and four years over two hundred and fifty trees per 

 acre. Even in such close stand the crown of living branches remains long, occupying one-third of 

 the bole, and dry branches persist down to over half the length. The steins are straight and 

 cylindrical, in this respect also reminding one of the Norway Spruce, although the tendency to 

 fork seems more frequently developed. 



YIELD OP WHITE PINE. 



The question as to the amount of material which the White Pine is capable of producing per 

 acre is difficult to answer. It can not, of course, be deduced from a knowledge of the development 

 of the individual tree, since there remains one factor unknown, namely, the number of trees of 

 different classes that can occupy an acre. Nor can the capacity of production, as a rule, be ascer- 

 tained from the actual production or acre yield of natural virgin growths, for these usually not 

 only do not occur in pure growths, but also are usually not developed under most advantageous 

 conditions, and do not, therefore, represent the possible or normal yield which could be secured. 

 Only by selecting smaller, seemingly normally and favorably developed groups in the forest at 

 different ages and in various localities and measuring the same may we arrive at an approximation 

 of what the species is capable of producing by itself. 



Such measurements have not been attempted, but the yield of virgin acres under varying 

 conditions has been ascertained to give at least a forecast of the possibilities, although not repre- 

 senting the normal or possible yield of fully stocked acres of White Pine. In addition we may 

 utilize the results recorded from Germany (page 69) of a number of plantations, which have had 

 the advantage of at least the partial care of forest management. 



From these indications, we are justified iu the assertion that the White Pine produces per 

 aero as well as any species with which we are acquainted in our northeastern woods, and at a rate 

 which is not excelled by any of the lumber trees within its range. 



In this respect, again, it approaches the German Spruce, though it probably excels this species 

 in persistency, as it does in the dimensions which it can produce. We can, therefore, for the first 



