34 



BULLETIN 8 6 3, IT. S. DEPARTMENT OF AGRICULTURE 



RULES FOR SCALING LOGS 



Table 1. 



■The contents of logs, in board feet, scaled by the International log 

 rule {using saw cutting one-fourth-inch kerf) 



Diam- 

 eter at 

 top end 

 of log 

 inside 

 bark 

 (inches) 



Length of log in feet 



10 



12 



14 



16 



18 



Contents of log in board feet 



12 



16 

 23 

 29 

 36 



44 



52 



62 



73 



84 



96 



110 



123 



138 



152 



168 



186 



203 



10 



13 



16 



19 



23 



15 



19 



24 



28 



33 



21 



27 



33 



39 



45 



29 



36 



43 



51 



59 



37 



45 



54 



64 



75 



46 



57 



68 



80 



92 



57 



70 



83 



97 



111 



68 



83 



100 



116 



133 



80 



98 



117 



136 



156 



94 



114 



136 



157 



180 



108 



131 



156 



181 



207 



123 



149 



177 



205 



235 



139 



169 



201 



232 



265 



156 



190 



225 



261 



297 



174 



212 



251 



290 



330 



193 



234 



279 



321 



366 



214 



259 



307 



354 



404 



235 



285 



337 



388 



442 



257 



311 



367 



424 



481 



105 

 127 

 151 

 176 

 204 

 233 

 265 

 299 

 335 

 372 

 412 

 453 

 497 

 542 



Table 2. — The contents of logs, in board feet, scaled bij the Doyle log rule 



Diam- 







Length of log 



n feet 







eter at 

 top end 





























of log 



8 



10 



12 



14 



16 



18 



20 



inside 

















bark 















(inches) 





c 



ontents of log in 



board fe 



St 





6 



2 



2 



3 



3 



4 



4 



5 



7 



4 



5 



7 



8 



9 



10 



11 



8 



8 



10 



12 



14 



16 



18 



20 



9 



12 



16 



19 



22 



25 



28 



31 



10 



18 



22 



27 



31 



36 



40 



45 



11 



24 



31 



37 



43 



49 



55 



61 



12 



32 



40 



48 



56 



64 



72 



80 



13 



40 



51 



61 



71 



81 



91 



101 



14 



50 



62 



75 



87 



100 



112 



125 



15 



60 



76 



91 



106 



121 



136 



151 



16 



72 



90 



108 



126 



144 



162 



180 



17 



84 



106 



127 



148 



169 



190 



211 



18 



98 



122 



147 



171 



196 



220 



245 



19 



112 



141 



169 



197 



225 



253 



281 



20 



128 



160 



192 



224 



256 



288 



320 



21 



144 



181 



217 



253 



289 



325 



361 



22 



162 



202 



243 



283 



324 



364 



405 



23 



180 



226 



271 



316 



361 



406 



451 



24 



200 



250 



300 



350 



400 



450 



500 



KEY TO COMMON KINDS OF TREES 2 



The following key is intended only as a guide in the identification of the more 

 common kinds of trees. It is based on prominent, distinctive characteristics 

 which can be readily observed by those who have no special training in botany. 

 Most of the terms used require no explanation. 



To use the key, decide first, by an examination of the leaf, in which of the 

 following seven sections your tree belongs ; then turn to that section, and from 

 the descriptions there given determine what kind of\ tree it is. 



- This key and the following tree descriptions are by William H. Lamb, formerly Scien- 

 tific assistant in dendrology, Forest Service. 



