From this series of curves Table No. 1 was taken. 
157 
The cubie contents 
(Table 2) of the average tree at ten year periods throughout its life, was 
computed according to the Schiffel formula, which is (.16B + .66b)h 
WE 
in which B represents the area of cross section at breast height, b represents 
the area of cross section at mid-height, h represents the total height of the 
tree, and V represents the volume. 
TABLE I.—Diameters at various points along the bole for every decade throughout 
the life of the tree; white oak. 
AGE IN YEARS. 
Height of 
Section 10 20 30 | 40 50 60 70 80 90 | 100} 110} 120) 130 
Above Ground, 
in Feet. 
Diameter inside the bark, in inches. 
(Stump) 14...... 120) 222 endl) eons 6.9) 8.2] 9.5)/10.7)12.0)13.2)14.5]/15.9 
WES HH e42ey 25.5 1.0) 2.0) 3.2) 4.3) 5.4) 6.5] 7.5) 8.6) 9.8/10.9)12.2/13.4 
Pei aka chemist TOW 2e2 9S -4|) 453) col) Osada sols. 6) 9 Si1O.7 Eis 
DNs Pecos fogs 9! 20) 3 Ol 4.2) 523)"6. 3) 7-4) 8.5)! 96/1056 
Sy ato ae seh) eee SEC Za Saye 7All on 7All ZAstell tenn) 
A ban eat a] LE Reti] Pade oan SOAR eieaerel ee ial, 7274) S553) bei ales Coa 1/559 
5S OE 2) ten tect ead fee eed | Ohesiicieal |. Gea] teers Fesmonee Bl ses en) [info ae eam ibetey) A fey eee a) 
TABLE I—Continued. 
AGE IN YEARS. 
Height of 
Section 140 150 160 170 180 190 | 200 | 210 } 220 | 230 | 240 
Above Ground, 
in Feet. 
Diameter inside the bark, in inches. 
(Stump) 14..... Wf Al 8.8) 20.3) 22.0) 23:8) 25-4) 27 22) 29-0} 30.7| 32.7) 35.0 
10 js] 5) 2 [aaa EN ee 146) 1650) 7 41s a 20) 2) 25) 2350)" 24. 5! 26.0), 27.26) 2923 
133. 13-20) 14.0) 15.2) 16.3) 17.4) 18.4) 19.4) 20.5) 21.5) 22.6) 23.6 
213. leas oe Ol losOl L620} Wied Sea TOls | 2Oks| 24) 2256 
SORTS oes TOPO (PLO | S22 else 4s 2) elses) lees e774) 18.4) 19) 52025 
413. 8.5 956) 10. 6) 11.6) 12.7) 1327) 1478) 15.8) 16.9) 1729) 19.0 
DOr cet crane 6.0) 7.2} 8.3) 9.3) 10.3) 11.4) 12.4) 13.4) 14.5) 15.6) 16.6 
