42 



BULLETIN 820, IT. s. DEPARTMENT OF AGRICULTURE. 



Table 25. — Volume in hoard feet of jaclc pine trees of differed diameters and heights in 



Minnesota. 



[Scaled by Scribner Decimal C log rule. Stump height, 1 foot: top diameter inside bark, 5.5 inches . Based 

 on taper curves, scaled m.ostly as 16.3-foot logs, with a few shorter logs where necessary.] 



Diam- 

 eter 



breast 

 high. 



Total height of trees (feet). 



Basis. 



20 



30 



40 



50 



60 



70 



80 



Volume (board feet). 



Inches. 

 8.... 

 9 ... 



9 



10 

 15 

 20 



11 

 17 

 23 

 29 

 36 

 43 

 51 



15 

 24 

 34 

 43 

 53 

 ol 

 76 

 90 

 104 

 118 

 134 



23 

 34 

 46 

 59 

 73 

 88 

 104 

 121 

 139 

 158 

 178 

 198 

 220 



36 

 50 

 65 

 81 

 98 

 116 

 136 

 158 

 182 

 207 

 234 

 262 

 291 



50 

 68 

 87 

 108 

 130 

 152 

 176 

 203 

 232 

 263 

 294 

 327 

 363 



Trees. 



72 



62 



64 



36 



27 



10 



8 



2 



4 



3 



10 





11 ... 





12 







13 







14 







15 . 







16 









17 









18 









19 









20 





















288 



Table 26. — Volume in. board feet of jack pine trees of different diameters, and number 

 of logs per tree, in Minnesota. 



[Scaled by Scribner Decimal C log rule. Stump height, 1 foot; top diameter inside bark, 5.5 inches. Based 

 on taper curves ; scaled mostly as 16.3-foot logs , with a few shorter logs where necessary.] 



Diam- 

 eter 

 breast 

 high. 



Number of 16-foot logs. 



Basis. 



1 



n 



2 



21 



3 



3i 



4 



Volume (board feet). 



Inches. 



8.... 



9.... 

 10.... 

 11 



14 

 17 

 20 



24 

 27 

 30 

 33 

 37 

 41 

 45 



39 

 42 

 46 

 51 

 57 

 64 

 73 

 83 

 94 

 106 

 121 



54 

 59 

 65 

 72 

 81 

 90 

 101 

 113 

 127 

 141 

 156 

 171 

 188 









Trees. 



72 



62 



64 



36 



27 



10 



8 



2 



4 



3 









82 

 93 

 105 

 118 

 131 

 146 

 163 

 180 

 198 

 217 

 237 











12 





132 

 147 

 163 

 181 

 201 

 223 

 245 

 269 

 293 



""187" 

 213 

 239 

 266 

 294 

 322 

 351 



13 





14 





15 





16.... 







17 







18 







19.... 







20.... 

















28S 



