278 A MANUAL FOR NORTHERN WOODSMEN 
less use of such tables. A chief reason is that men tend 
strongly to tally timber as yielding the log lengths to 
which they are accustomed in practice, which in the case 
of large trees departs widely from the theoretical utiliza¬ 
tion. Thus, a 36-inch 5-log hemlock is given in table 28 
as having 3430 feet of timber. In logging, however, 
somewhere about 128 feet in log lengths would be got out 
of it. If, then, a cruiser tallied it as a 4-log tree, his table 
would give him 2530 feet, over 26 per cent less than the 
true volume. That might indeed in a given case just about 
make due breakage and defect allowance, but such a re¬ 
sult accidentally arrived at is no justification of the practice. 
The user of these tables, then, of whatever description, 
must realize their exact nature and govern his field work 
accordingly. Judgment also must supplement their use, 
Tree No. 
Diameter I 
Outside 
Bark 
breast High 
Inside 
Bark 
Diameter at Top 
of Log 
(32 Feet) 
Contents by 
Decimal 
Rule 
Inches 
Inches 
1 
2 
3 
4 
5 
Feet 
1 
27 
23 
19 
16 
13 
10 
1,110 
2 
38 
32 
26 
23 
20 
15 
2,590 
3 
53 
45 
36 
32 
27 
21 
5,030 
4 
84 
74 
62 
57 
51 
46 
36 
19,570 
5 
23 
18 
15 
11 
850 
6 
23 
20 
18 
16 
is 
i2 
1,750 
7 
26 
24 
20 
17 
14 
8 
1,290 
8 
39 
36 
31 
28 
24 
17 
2,760 
9 
46 
43 
36 
31 
26 
19 
io 
4,870 
10 
51 
48 
41 
37 
32 
24 
12 
7,040 
11 
48 
43 
39 
34 
25 
11 
7,690 
12 
48 
40 
37 
32 
21 
11 
6,760 
13 
30 
27 
25 
21 
12 
2,790 
14 
30 
25 
23 
19 
12 
2,310 
15 
74 
63 
60 
46 
41 
17,090 
16 
73 
54 
48 
45 
40 
13,280 
and some men, having arrived at direct, first-hand grasp 
of timber quantity, find tables of use only incidentally. 
On pages 196 to 197 volume tables produced by scal¬ 
ing logs decreasing by a regular taper, as if trees were 
conical in form, were referred to as in wide use in Oregon 
