UTILIZATION OF BLACK WALNUT. 
77 
lumber might be of full width and the gunstock flitch might not be 
edged. This was a great advantage in cutting out the clear blanks. 
Some mills found it possible to saw as much as 40 per cent of pro- 
peller stock from their logs. This was generally accomplished bv 
sawing on four sides of the log. The small amount of gunstock flitch 
obtained by this method was very defective and yielded few blanks ; 
hence the resultant waste, including low-grade lumber unsuited for 
war material, amounted to about 50 per cent. When the best utiliza- 
tion was reached in the production of war materials, the average 
yield was about as follows: Propeller lumber, 15 to 18 per cent; 
gunstock flitch, 65 to 70 per cent; waste, in the form of low-grade 
lumber, 15 to 18 per cent. 
Table 25. — Proportionate amounts of propeller stock, gunstock flitch, and low- 
grade lumber; and values per 1,000 board feet, sawed from walnut logs. 
TYPE 1.— FAIRLY SMOOTH LOG, 15 INCHES IN DIAMETER ("GUNSTOCK LCG"). 
[In cases A, B, C, and D all cuts are parallel.] 
Propeller stock. 
Gunstock flitch. 
Low-grade lumber. 
Total 
value 
per 
1,000 
feet. 
Case. 
Per 
cent. 
Amount. 
Value 
($300 
per 
1,000 
feet). 
Per 
cent. 
Amount. 
Value 
($1 per 
gun- 
stock 
blank). 
Per 
cent. 
Amount. 
Value 
($20 
per 
1,000 
feet). 
A... 
Feet. 
85 
70 
60 
20 
850 feet, at $143 per 1,000 
feet (7 feet per blank). 
700 feet, at $111 per 1,000 
feet (9 feet per blank). 
600 feet, at $100 per 1,000 
feet (10 feet per blank). 
200 feet, at $67 per 1,000 
feet (15 feet per blank). 
$121. 55 
77.70 
60.00 
13.40 
15 
20 
25 
55 
Feet. 
150 
200 
250 
550 
$3.00 
4.00 
5.00 
11.00 
$124. 55 
B.... 
c 
D... 
10 
15 
25 
100 
150 
250 
$30. 00 
45.00 
75.00 
111.70 
110. 00 
99.40 
TYPE 2.— SMOOTH LOG, 18 INCHES IN DIAMETER ("PROPELLER LOG"). 
[In cases E and F all cuts are parallel. In case G the log is cut on all four sides.] 
E.... 
50 
500 
$150. 00 
45 
450 feet, at $111 per 1,000 
feet (9 feet per blank). 
$49. 95 
5 
50 
$1. 00 
$200. 95 
F 
60 
600 
180. 00 
30 
300 feet, at $100 per 1,000 
feet (10 feet per blank). 
30.00 
10 
100 
2.00 
212. 00 
G.... 
75 
750 
225. 00 
10 
100 feet, at $80 per 1,000 
feet (12 feet per blank). 
8.00 
15 
15) 
3.00 
236. 00 
During the war period logs were divided roughly into two classes — 
airplane logs, which would saw out comparatively large amounts of 
propeller stock, and gunstock logs, which were of value chiefly for 
the gunstock flitch. When the best utilization was practiced smooth 
logs 16 inches and over in diameter at the small end were generally 
considered as airplane logs, and rough logs of all sizes and smooth 
logs under 16 inches in diameter at the small end were classed as 
gunstock logs. Some flitch was, of course, obtained from propeller 
