550 INDEX 



PAGE 



Timber estimating, factors determining the methods used in 255 



forest survey as distinguished from 268 



importance of area determination in 267 



Umits of accuracy in 301 



methods 267 



six classes of averages employed in 258 



record of 276 



types, map 268 



Top diameters, co-ordination of merchantable heights with 184 



fixed or variable limits 183 



versus variable, influence on frustum form factors 221 



Topographic map 268 



Topography, effect on methods of estimating 265 



Tops, merchantable limit in : 177 



Tor Jonson 207 



Total growth on a large area, factors 447 



height of tree, measurement 156 



increment of a forest includes that of immature stands 443 



or 100 per cent estimates 271 



per cent of waste in a log 55 



versus merchantable contents of logs 16 



heights as a basis for tree classes 184 



yield 315 



Township, definition 6 



Training of timber cruisers 303 



Treatment, effect on growth 391 



of stand, effect on diameter growth 353 



Tree analysis, Umitations of use 326 



measurements required for 289 



purpose and application 374 



substitution of taper tables for 382 



substitution of volume tables for 375 



as a unit in estimating 144 



classes, total versus merchantable heights as a basis for 184 



diameters, measurement 227 



dimensions, ocular estimation of 234 



form, Hoejer's formula for 209 



resistance to wind pressure 208 



record, in connection with volume tables 155 



volume, computation 161 



systems used in taking measurements of 158 



Trees for measurement, selection for volume tables 154 



standing, measurement 226 



Trimming allowance 92 



lengths, in measuring trees for volume 161 



Truncated cone 19 



neiloid 19 



paraboloid 19 



Twenty-two Inch standard 29 



Iwo-thirds log rule 34, 35 



