I30 



Forestry Quarterly. 



On sample areas of over 12 acres extent the following average 

 data of growth were obtained, giving actual heights and the years 

 per inch of diameter needed in each diameter class. 



Diameter Class : 4-8 



9-13 



14-18 



19-23 inches 



Beech 

 Maple 

 Ash 

 Oak 



Years Height Years Height Years Height Years Height 



7 87 



II 

 12 

 13 



64 

 67 



19 



76 



Of most interest is the comparison of height for beech com- 

 pared with timber forest conditions : 



These figures would show that while in early life the height 

 growth remains behind, finally it is evened up. 



An elaborate stem analysis of beech trees from close timber 

 forest and from selection forest, to determine difference in form, 

 and the changes in it in consequence of setting free trees which 

 have stood in close cover, shows that, while the width of the decen- 

 nial increment in diameter in the younger years of dense selection 

 forest trees decreases from base to top (rapid taper), in the 

 middle polewood stage and beginning timber-wood stage it 

 increases, just as in timber forest trees (becoming full-bodied). 

 In the tree grown in dense position of timber forest, from a 

 "turning point," six to ten feet above ground, the ring width of 

 the decennial increment increases both down and upward, in the 

 upper portions to 1.5 to 4 times the width at the turning point. 



In the selection forest, trees which have been set free show 

 during the period of freedom a gradual decrease from the turning 

 point upward to the crown, in the given case by one-third of 



