BOARD MEASURE 
143 
Service in various spruce mills of Maine. Some results of 
this test are given in tabular form. All logs were straight 
and sound, and exact conditions were as follows: 
Band Mill No. 1, J-inch saw kerf, lumber cut just 1 inch 
thick. Mill run for economy and utmost product of long 
lumber, giving product of about 40 M daily. 
Band Mill No. 2, same saw kerf. Mill run for speed 
rather than economy, product being 58 M a day. 
Rotary Mill, T ^-inch saw kerf, lumber even inch thick. 
Gang Saw, ^--inch kerf, lumber even inch thick, logs 
sawed alive or through and through. 
TABLE I. YIELD IN INCH BOARDS OF LOGS 16 FEET 
LONG AS SAWED IN DIFFERENT MILLS 
Top 
Diam. 
Band Mill No. 1 
Logs turned 
Band Mill No. 1 
Sawed alive 
Band Mill No. 2 
Sawed alive 
Rotary 
Sawed alive 
Gang 
Scale by 
Maine 
Log 
Rule 
6 in. 
30 
26 
20 
18 
24 
20 
7 in. 
41 
36 
29 
25 
34 
31 
8 in. 
53 
47 
39 
35 
43 
44 
9 in. 
66 
59 
51 
46 
54 
52 
10 in. 
81 
73 
64 
59 
67 
68 
11 in. 
96 
88 
79 
73 
80 
83 
12 in. 
112 
106 
95 
89 
94 
105 
13 in. 
130 
125 
113 
107 
109 
120 
14 in. 
149 
. . . 
133 
127 
126 
140 
15 in. 
171 
. . . 
154 
. . . 
145 
161 
16 in. 
196 
. . . 
178 
. . . 
165 
179 
