TABLES RELATING TO PARTS III AND IV 265 
Table No. 6 gives volume of tree from ground to tip 
exclusive of branches. Includes bark, which is about 12% 
per cent of the total volume. Based on 2500 trees cut in 
Maine, New Hampshire, and New York, calipered each 4 
feet, computed separately, and averaged. Original. 
This table may without great modification be applied to 
other soft wood species, regard being had to the remarks on 
tree form on pages 167—173 of this volume. Balsam fir, 
however, is believed to be pretty uniformly somewhat 
slimmer than spruce, having, as would appear from the 
results of a study on fir made by Mr. Zon of the United 
States Forest Service, 8 per cent less volume for the same 
breast diameter and height. 
VOLUME TABLE No. 7. SPRUCE IN FEET, BOARD 
MEASURE 
Breast 
Diam¬ 
eter 
Total Height of Tree — Feet 
Inches 
40 
45 
50 
55 
60 
65 
70 
75 
80 
90 
7 
20 
20 
20 
25 
25 
8 
20 
25 
30 
35 
40 
45 
9 
30 
35 
40 
45 
50 
55 
10 
40 
45 
50 
60 
65 
70 
'80 
11 
55 
65 
70 
80 
90 
105 
iis 
12 
65 
75 
85 
100 
110 
120 
135 
iso 
13 
75 
SO 
100 
115 
125 
140 
155 
170 
14 
105 
120 
135 
150 
165 
180 
195 
15 
120 
135 
155 
170 
ISO 
205 
220 
16 
155 
170 
185 
205 
225 
250 
3i5 
17 
170 
190 
210 
230 
250 
275 
350 
18 
185 
210 
235 
255 
280 
310 
390 
19 
205 
235 
260 
290 
320 
350 
430 
20 
235 
265 
295 
325 
355 
385 
470 
21 
300 
330 
360 
390 
425 
510 
22 
330 
360 
395 
430 
465 
550 
23 
360 
400 
435 
470 
510 
600 
24 
400 
440 
480 
515 
555 
650 
Based on 2500 trees scaled in 16-foot log lengths up to 
6 inches in diameter by the Maine rule and discounted 
from 5 to 10 per cent. Purports to give the yield in edged 
lumber of average spruce trees in economical woods and 
mill practice. 
