258 A MANUAL FOR NORTHERN WOODSMEN 
BRITISH COLUMBIA LOG SCALE 
Established by the government, and derived from the 
following rule: — Deduct inches from the mean diam¬ 
eter of the log at the small end; square the result and mul¬ 
tiply by .7854; deduct divide by 12; multiply by the 
length of the log in feet. 
Logs more than 40 and not over 50 feet long to be scaled 
as two logs of equal length, the butt log taken as 1 inch 
larger than the top. Logs over 50 and not over 60 feet 
long to be treated similarly, but with 2 inches rise allowed 
to the butt log; and so on, 1 inch of rise being added for 
each 10 feet or part thereof over 40 feet. 
B 
o 
Diameter in Inches 
z 
a 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
ft. 
1 
3 
4 
5 
6 
7 
9 
10 
11 
13 
15 
16 
18 
20 
22 
24 
26 
10 
34 
43 
53 
63 
74 
87 
100 
114 
130 
146 
163 
181 
200 
220 
241 
263 
12 
41 
52 
63 
76 
89 
104 
120 
137 
155 
175 
195 
217 
240 
264 
289 
315 
14 
48 
60 
73 
88 
104 
121 
140 
160 
181 
204 
228 
253 
280 
308 
337 
368 
16 
55 
69 
84 
101 
119 
139 
160 
183 
207 
233 
261 
290 
320 
352 
386 
421 
18 
62 
77 
94 
113 
134 
156 
180 
206 
233 
262 
293 
326 
360 
396 
434 
473 
20 
69 
86 
105 
126 
149 
173 
200 
229 
259 
292 
326 
362 
400 
440 
482 
526 
22 
76 
94 
115 
138 
164 
191 
220 
252 
285 
321 
358 
398 
440 
484 
530 
578 
24 
83 
103 
126 
151 
178 
208 
240 
274 
311 
350 
391 
434 
480 
528 
578 
631 
26 
89 
112 
136 
164 
193 
226 
230 
297 
337 
379 
424 
471 
520 
572 
626 
683 
28 
96 
120 
147 
176 
208 
243 
280 
320 
363 
408 
456 
507 
560 
616 
675 
736 
30 
103 
129 
157 
189 
223 
260 
300 
343 
389 
437 
489 
543 
600 
660 
723 
789 
32 
110 
137 
168 
201 
238 
278 
320 
366 
415 
466 
521 
579 
640 
704 
771 
841 
34 
117 
146 
178 
214 
253 
295 
340 
389 
441 496 
554 
615 
680 
748 
819 
894 
36 
124 
155 
189 
227 
268 
312 
360 
412 
466 
525 
586 
652 
720 
792 
867 
946 
38 
131 
163 
199 
239 
283 
330 
380 
435 
492 
554 
619 
688 
760 
836 
916 
999 
40 
138 
172 
210 
252 
297 
347 
400 
457 
518 
583 
652 
724 
800 
880 
964 
1051 
