48 



BULLETIN" 285, U. S. DEPARTMENT OF AGRICULTURE. 



Table 15. — Yellow birch in the Lake States, 1 volumes in board feet. 



AVERAGE TOP DIAMETERS. 



Diameter 

 breast- 

 bigh. 



Number of 16-foot logs. 



Diameter 



inside 



bark of 



top. 



Basis. 



1J 2 2% 3 3} 



Volume — board feet. 



Inches. 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 38 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 



23 

 30 

 36 

 43 

 50 

 57 

 65 

 73 

 82 



37 



45 



54 



63 



73 



83 



94 



110 



120 



140 



160 



180 



200 



230 



260 



290 



330 



360 



400 



440 



480 



520 



560 









Inches. 

 6 

 6 

 6 

 6 

 7 

 7 

 7 

 8 

 8 

 9 

 9 

 10 

 10 

 11 

 12 

 12 

 13 

 14 

 15 

 15 

 16 

 17 

 17 



Trees. 

 11 

 17 

 26 

 17 

 27 

 20 

 16 



8 

 16 

 15 

 15 

 13 



9 



6 



3 



5 



4 



4 



2 

 ...... 



2 









72 

 84 

 97 

 110 

 130 

 140 

 160 

 180 

 210 

 230 

 270 

 300 

 340 

 380 

 430 

 470 

 520 

 570 

 620 

 670 

 720 



92 

 100 

 120 

 140 

 160 

 180 

 200 

 230 

 260 

 290 

 330 

 370 

 410 

 460 

 510 

 570 

 630 

 690 

 760 

 830 

 900 



170 

 190 

 210 

 240 

 270 

 300 

 340 

 380 

 430 

 490 

 550 

 610 

 680 

 750 

 830 

 900 

 980 

 1,050 



237 



1 Gogebic and Wexford Counties, Mich.; Marinette and Vilas Counties, Wis. 



Scaled from taper curves by Scribner Decimal C rule; mostly in 16.3-foot logs, with a few shorter logs 

 where necessary. Stump height, 1 foot. Average utilization. 



Table 16. — Yellow birch in the Lake States, 1 volumes in board feet. 

 MINIMUM TOP DIAMETERS. 



Diameter, 

 breast- 

 high. 



Number of 16-foot logs. 



Diameter 



inside 



bark of 



top. 



Basis. 



2 



21 3 3| 4 



« 



Volume— board feet. 



Inches. 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 



32 

 40 

 49 



58 



81 

 94 



43 



52 



62 



73 



85 



98 



110 



130 



150 



55 

 66 

 78 

 90 

 100 

 120 

 130 

 150 

 170 

 190 

 220 

 240 

 270 

 310 

 350 

 390 

 440 

 480 

 540 

 590 

 650 

 710 

 780 









Inches. 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 



7 

 8 

 8 

 9 



10 

 10 

 11 

 12 

 13 



Trees. 



11 



17 



26 



17 



27 



20 



16 



8 



16 



15 



15 



13 



9 



6 



3 



5 



4 



4 



2 



i" 



2 









95 

 110 

 130 

 140 

 160 

 180 

 200 

 230 

 250 

 280 

 320 

 360 

 400 

 450 

 500 

 550 

 610 

 670 

 740 

 820 

 890 











140 

 160 

 180 

 210 

 230 

 260 

 290 

 330 

 360 

 410 

 450 

 500 

 560 

 620 

 690 

 760 

 830 

 920 

 1,010 



240 

 270 

 300 

 330 

 370 

 410 

 460 

 510 

 560 

 620 

 690 

 760 

 840 

 920 

 1,010 

 1,100 



























































237 



1 Gogebic and Wexford Counties, Mich.; Marinette and Vilas Counties, Wis. 



Scaled from taper curves by Scribner Decimal C rule; mostly in 16.3-foot logs, with a few shorter logs 

 where necessary. Stump height 1 foot. Close utilization. 



