530 INDEX 



PAGE 



Defect, effect-upon grades of logs 460 



Defective logs, merchantable 99 



scaling of 105 



trees, measurement for volume tables 183 



Defects, deductions for, in timber estimating 271 



exterior 113 



in cord measure, discounting for 133 



in lumber 456 



interior 108 



or cull in volume tables 179 



sound and unsound 103 



unsound, deductions from scale for 105 



Degree of uniformity of stand as affecting methods employed in estimating. . . . 265 



Dendrometers 247 



Density factor, determination of areas from 416 



factors, application in prediction of growth from yield tables 414 



for mature stands, effect of separation of areas of immature 



timber 453 



of crown area 424 



of stand, effect on diameter growth 352 



of stocking as affecting growth and yields 392 



of stocking, empirical 413 



of stocking, standard for normal 397 



Derby log rule 36 



Derivation of local volume table from standard volume tables 175 



of standard breast-high form factors 213 



Description of plot, yield tables 399 



Determination of what constitutes a merchantable log 99 



Determining the age of stands 335 



of trees 335 



Diagrams, construction of log rules based on 72 



in construction of log rules 58 



use of, for deductions in scaling 106 



Diameter alone, versus diameter and height as basis of volume tables 152 



and height classes, classification and averaging of tree volumes by ... . 163 



at middle of log, scaling practice based on 97 



at small end of log, scaling practice based on 91 



breast high 150 



in measuring standing trees 226 



Classes 227 



comparison of growth for 360 



current periodic growth based on 358 



clasification of trees by 151 



groups as basis of age'groups 422 



growth, basis for determining 342 



computation of 346 



correction for seedling age 348 



effect of species on 351 



in even-aged stands, laws of 354 



in many-aged stands, laws of 357 



