TABLES RELATING TO PARTS III AND IV 273 
VOLUME TABLE No. 17. NORTHERN HARD WOODS (BIRCH, 
BEECH AND MAPLE) BY THE SCRIBNER RULE 
(Adapted from Bulletin No. 285, U. S. Forest Service, 
by E. H. Frothingham) 
Diameter 
breast- 
high 
Number of 16-foot Logs 
Diameter 
inside 
bark of 
top 
1 
tt 
2 
2a 
3 
3§ 
4 
Inches 
Volume 
— Board Feet 
Inches 
9 
20 
30 
45 
6 
10 
20 
35 
50 
70 
6 
11 
25 
40 
60 
80 
100 
6 
12 
25 
50 
70 
95 
120 
140 
7 
13 
30 
55 
80 
110 
140 
170 
7 
14 
30 
65 
95 
130 
160 
190 
230 
7 
15 
70 
110 
140 
180 
220 
260 
8 
16 
80 
120 
160 
210 
250 
290 
8 
17 
140 
190 
240 
280 
320 
9 
18 
160 
210 
270 
320 
380 
9 
19 
240 
300 
360 
430 
10 
20 
270 
340 
410 
49(3 
10 
21 
300 
380 
460 
550 
11 
22 
340 
430 
520 
620 
12 
23 
380 
480 
580 
690 
12 
24 
... " 
420 
530 
640 
770 
13 
Based on 800 trees cut in the Lake States scaled from 
taper measures in logs 16.3 feet long from a stump 1 foot 
high to top diameters found in actual logging: figures 
evened by curves. As no allowance was made for crook 
and defect, considerable discount is necessary in most 
timber. 
Note. Comparison between the values in this table and the preceding 
shows striking differences, and the text indicates how these arose, from dif¬ 
ferences in tree form and soundness, lumbering practice, and methods of re¬ 
cording and computing. The cruiser is under obligation before he applies 
either in practice to understand these points, and he will do well to check 
the table he uses with local practice and on local timber. That done, how¬ 
ever, the tables will apply throughout the distribution of the species. 
