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 by 

 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 loic- 

 grade lumber; and values per 1,000 board feet, sawed from ivalnut logs. 



TYPE 1.— FAIRLY SMOOTH LOG, 15 INCHES IN DIAMETER ("GUNSTOCK LCG"). 

 [In eases A, B, C, and D all cuts are parallel.] 





Propeller stock. 



Gunstock flitch. 



Low-grade lumber. 





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). 



Total 

 value 

 per 

 1,000 

 feet. 



A 





Feet. 





85 

 70 

 60 

 20 



850 feet, at S143 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 

 111.70 

 110. 00 

 99.40 



B.... 



c 



D.... 



10 

 15 

 25 



100 

 150 

 250 



$30. 00 

 45.00 



75.00 



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 



15D 



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 



