16 



BULLETIN 426^ XJ. S. DEPARTMENT OF AGRICULTURE. 



Table 7. — Lumber grade product of sugar pine by log grades and log diameter classes. 



LOG GRADE I. 



Diameter class logs. 



25 to 28 inches . 

 29 to 32 inches . 

 33 to 36 inches . 

 37 to 40 inches . 

 41 to 44 inches. 



land 2 

 clear. 



3 clear. 



1 shop. 



2 shop. 



3 shop. 



1 and 2 

 com- 

 mon. 



Per ct. 



Per ct. 



Per ct. 



Per c 



Per c 



Perct. 



21 



8 



19 



10 



2 



35 



23 



8 



20 



11 



2 



31 



25 



9 



21 



11 



3 



25 



27 



10 



22 



11 



3 



21 



30 



10 



22 



12 



3 



16 



Box. 



Per ct. 

 5 

 5 

 6 

 6 

 7 



GRADE II. 



21 to 24 inches . 

 25 to 28 inches. 

 29 to 32 inches . 

 33 to 36 inches . 

 37 to 40 inches. 

 41 to 44 inches . 



3 



2 



10 



18 



6 



57 



3 



2 



11 



23 



6 



50 



3 



2 



13 



25 



6 



44 



4 



2 



17 



26 



6 



38 



6 



4 



20 



24 



6 



33 



7 



S 



22 



21 



7 



30 



GRADE III. 



9 to 12 inches . . 

 13 to 16 inches . 

 17 to 20 inches. 

 21 to 24 inches . 

 25 to 28 inches . 

 29 to 32 inches . 

 33 to 36 inches. 



0.1 

 0.2 

 0.3 

 0.4 

 0.4 



0.1 

 0.1 

 0.2 

 0.2 



0.5 



2 



7 

 12 

 15 

 19 



0.5 



3 



8 

 13 

 17 

 21 



14 



15 



14.9 



14.7 



13.6- 



13.4 



12.4 



The same study gave figures on the overrun of the lumber tally 

 over the log scale (Table 8). The mill was an efficient single band 

 with standard equipment. The sawing practice was normal for the 

 region, except that railroad ties were sawed from many of the top 

 logs, which gave too high an overrun for Grade III logs. 



Table 8. — Overrun by log grades and log quality. 





Soimd 

 logs. 



Defective 

 logs. 



Sound 



and 



defective 



logs. 





Per cent of the log scale. 



Grade I 



3.0 



6.3 



11.6 



2.1 



4.6 

 8.9 



2 6 



Gradell 



5 9 



Grade III 









Total 



7.8 



4.6 



7 







VALUES AND GRADES OF LUMBER. 



The value and amount of the higher grades of lumber obtained 

 from a species measure its intrinsic commercial worth. 



Sugar pine logs yield a higher percentage of wide, clear, high-grade 

 lumber than yellow pine. This material commands a high price for 

 special uses in the trades, which accounts for the lumberman's 



