Periodical Literature. 481 



In determining the value increment of stands Borggreve's 

 method, modification of Schneider's formula for volume incre- 

 ment is applicable, measuring from 10 to 30 trees and collating 



^ {P.K.b.z. I 



the data properly summed up by pval. 



D-^s J 



Sa.(P) 



K, the constant, being 200 or varied as above. A graphic table 

 and other helps for easier calculations, etc. are given, too elabo- 

 rate to reproduce here. 



An example may elucidate the procedure : The value incre- 

 ment per cent of a pine is to be ascertained measuring d. b. h. 

 45cm, the bored cores show in the last period (opening up 2 years 

 ago) a width of 1.2 cm, i. e. a ring width of 1.5 mm; density of 

 stand .7, height and form increment=o. From a table we obtain 



200 P — p _ 



values for s, z, etc., and find s=39; z=.9i ; p= — — ^ 5 



, . . .1 • 1 400X.15 200X.15X.91 , 



the value per cent then is pval.=: ^——^ \-i 



^ ^ 45 — 1.2 16+62 ^ 



45— 1.2+ . 



2 



which (read from graphic table) reduces to 2.y%. An ex- 

 tensive literature reference on the subject ends the article which 

 was written for a doctor's thesis. B. E. F. 



Beitr'dge zur Ermittlung des forstUchen W ertzuwachses. Forstwissen- 

 schaftliches Centralblatt. Sept., Oct., pp. 465-511. 



The Supreme Court of Pennsylvania 

 Damages holds that, in an action to recover damages 



for for the loss of growing timber by fire 



Destruction caused by the defendant's negligence, the 



of measure of damages was not the value of 



Timber. the wood destroyed, but the injury to the 



farm as a whole by the destruction of the 

 timber, where much of the timber was young and not marketable, 

 and had no value as wood, but was growing into value and added 

 to the value of the land it covered, and the whole of it added to 

 the value of the farm of which it was a part. Bullock vs. Balti- 

 more & Ohio Railroad Co., 84 Atl. R. 421. 



American Lumberman. April, 1913. 



