4i8 Forestry Quarterly. 



cedar, cyp, poui, Honduras mahogany, etc. The history of con- 

 servation in Trinidad is but another instance of the influence of 

 forest cover upon waterflow. 



T. S. W., Jr. 



Forestry in Trinidad. The Indian Forester. April, 1913. Pp. 183-194. 

 BOTANY AND ZOOLOGY. 



Dr. Zederbauer reports from the Austrian 



Individual Experiment Station on heredity of Finns 



Heredity austriaca based on 7 years of observation, 



of which yield, however, less valid conclusions 



Trees. than the same studies on the Scotch Pine 



(briefed in Vol. X, p. 733), which concern 



themselves with discovering the influence not of constant forms 



but of small individual differences on the progeny- The seed 



trees from which seeds are propagated are selected in one and the 



same locality according to differences of bole or crown, which are 



determinative in wood production. 



Height growth varies less than with Scotch Pine, yet the six- 

 year plants vary from 62 to 91 cm, and the seven-year olds be- 

 tween 92 and 130 cm, that is to say, the difference is increasing 

 in the yearly shoots. The difference between smallest and larg- 

 est individuals of the progeny of the same seed tree is consider- 

 ably greater. The broad-crowned are slightly higher than the 

 narrow-crowned. 



Altogether, as with Scotch Pine, it is apparent that the dif- 

 ference in individuals of a stand is not only the result of the 

 accidental site but due to inherent disposition. There are some 

 broad-crowned ones with few but stout branches, forming a loose 

 crown, growing fast and producing more log timber than the 

 small-crowned with many, but slender branches, slow growers. 



The progeny of the broad-crowned is also faster growing than 

 that of the narrow-crowned: the habitus is the same or nearly 

 so as the parent tree. 



The progeny of very old seed trees is considerably smaller 

 than that of very young, but that of 15-to-ioo-year-old trees does 

 not show a decided difference. 



Versuche i'lber individuelle Auslese bei Woldbdumen II Pinus austriaca. 

 Centralblatt fiir das gesammte Forstwesen. May, 1913. Pp. 197-204. 



