INDEX 



PAGE 



Abney clinometer 239 



Abnormal cross sections 17 



plots, rejection, yield tables 404 



Absolute form factors 212 



quotient 207 



versus relative accuracy in mensuration 3 



Accuracy in timber estimating, limits of 301 



of results in timber estimating, choice of system for 261 



of timber estimates, methods of improving 288 



of volume tables, checking 189 



of yield predictions 412 



Accurate formula log rules 65 



log rules, need for 50 



Acre, area of 6 



Actual density of stocking, determination of 413 



estimate or measurement of the dimensions of every tree of merchant- 

 able size 257 



Adirondack standard or market 28 



Adoption of a standard log length for volume tables 182 



Advantages of graphic plotting of data 166 



Age, as affected by suppression 341 



average, definition and determination 337 



classes, group form, separation 418 



in yield tables 397 



economic • 341 



from annual whorls 337 



groups, yield tables for 412 



in even-aged versus many-aged stands, the factor of 325 



of average trees and of stand, determining 339 



of seedling. 336 



of stand, determining 335, 339 



of stands relation to volume 449 



of timber, effect on methods of estimating 265 



of trees, determining 335 



separation of, in yields 416 



Ake log rule 36 



Annual increment of many-aged stands 390 



whorls of branches as an indication of age 337 



Applicability of Hoejer's formula in determining tree forms 210 



523 



