48 



THE WHITE I'lXE. 



It may be of interest to record more especially the data of a small clamp of young White 

 Pine sprung up naturally on an abandoned field of less tbau three-fourths of an acre in extent, 

 situated near Farmington, N. H., which its owner (Mr. J. D. Lyman, of Exeter) had from time to 

 time thinned out for the last twenty-two years, with a view of accelerating the growth of the 

 trees. Unfortunately, no record of previous conditions and frequency and extent of operations 

 was attainable, bat the present condition (three or four years ago) is exhibited in the following 

 table: 



Data of a clump of naturally grown young White Pine. 

 [Age: Forty-six to fifty-six years; average, nfty-one years. Height: 70 to 80 feet. Area: 108 square rods.] 



This would indicate a yield per acre of about 6,000 cubic feet, from which, with the dimensions 

 attained under careful mill practice, some 30,000 feet of lumber might be cut. To be sure, with 

 such open stand much of this must be knotty, even though the trees were pruned as far as possible. 



By comparison with the measurements of naturally grown uuthiuued acres, we find that two 

 to three times the number of trees of the age indicated in the above table might stand on an acre 

 and make as much total product (see Massachusetts, site c, which, with 324 trees, produced 6,188 

 cubic feet); and although a few trees in the thinned grove had reached larger dimensions, the 

 total product of trees over 12 inches in diameter is almost the same, the difference in favor of the 

 thinned part being only 100 cubic feet. From this comparison it would appear that the thinning 

 was too severe to secure the most desirable results. PI. X shows the condition of the grove when 

 the measurements were taken. 



Allowance, however, should be made for the amount utilized in thinnings. Whether this 

 inferior material would pay in most cases the cost of its removal is questionable. A very uncertain 

 estimate by the man who performed the thinnings places the amount of wood removed equal to 

 that now standing, among which is 5,000 shingles. 



The following table shows the measurements of one of the largest trees in the grove: 



Measurements of tree. 

 [Age: Fifty-six years. Height: 80 feet.] 



This tree, when felled and cut into waney-edged boards, made lumber to the amount of 364 feet. 



