48 



THE WHITE I'lXE. 



It may be of interest to reconl more espeeially tlie data of a small clumji of young "WLite 

 Pine siiruiig up nanually on an abandoned lield oF less tlian tlireelonrtlis of an acre in extent, 

 situated near Farmiugtou, N. II., which its owner (Mr. J. D. Lyman, of Exeter) bad 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 freciuency and extent of oiierations 

 was attaiuable, but the preseut conditiou (three or four years ago) is exhibited in tlie following 

 table: 



Jhtta of a vlHtnp of naturally (jritwn yonnij White Pine, 

 [Age: Forty-six to fiCtj'-ftix yuara; average, fifty-ono yeiira. Height: TiJloSOfeet. Area: 108 tKjiiare rodfl.] 



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

 attained uuder careful mill practice, some 3(i,000 feet of lumber might be cut. To be sure, with 

 such open stand much of tliis must be knotty, even thoujih the trees were pruned as far as jiossiljle. 



By com[)ari.sou with the measurements of naturally grown unthinned acres, we find that two 

 to three times the number of trees of the age indicated in the above table might stand oa au acre 

 and make as much total jtroduet (see Massachusetts, site c, wliich, with 324 trees, piujduced (5,188 

 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 difJ'erence in favor of the 

 thinned part being onlj' IdO 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 (juestioiial)le. A very uncertain 

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

 that now standing, among wliich is '>SW() shingles. 



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



MeatHrimenli uf 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. 



