BULLETIN 50G, U. S. DEFASTMEISTT OF AGEICULTUEE. 



NO. or 



MILLS 



CLASS "V, 

 O.OOO M FT 

 AND OVER'^ 



QUANTITY 

 OF LUMBER 



NO.OF 

 MILLS 



CLASS 3V 

 5.000T0 9.999 

 M.FT." 



QUANTiTY 

 OF LU^^BER 



PRODUCTION BY CLASSES OF MILLS. 



Table 2 (page 7) shows the production hj classes of sawmills for 



the years for which snch data have been compiled. Mills having 



QUAN'TiTY an annual cut of less 



Ot LUMBER J -I en n/-vA p 



than 50,000 i e e i 

 have not been con- 

 sidered for the years 

 since 1909. The 1909 

 total figure in Table 

 2 is thus reduced, 

 and so is slightly 

 less than the corre- 

 sponding figure in 

 Table 1. Reports 

 from such mills 

 would probably not 

 have increased the 

 total production by 

 more than one-half 

 of 1 per cent. Table 

 2 and figure 1 show 

 that the large saw- 

 mills furnish most 

 of the supply of 

 lumber, and also 

 how a nearly com- 

 plete lumber census 

 can be made by per- 

 sistent efforts to get 

 reports from mills 

 -cutting 1,000,000 

 feet and over. The 

 1915 lumber census 

 was conducted in 

 this manner. 



Figure 1 shows 

 graphically the num- 

 ber of mills and the 

 production of each 

 class. The small 

 number of mills in 

 class 5, which cut 55.8 per cent of the total, is very significant when 

 compared with the large number of mills in class 1, which cut only 

 10.7 per cent of the total. 



CLASS nr 



.000 TO -4-.9 9 9 

 M. FT. 



QUANTITY 

 OF LUMBER 



CLASS 3X 



5O0TO 9 99 



M FT. 



NO.OF 

 MILLS 



QUANTITY 

 OF LUMBER 



CLASS I 

 50 TO -499 

 M.FT. 



Fio. 1. — Computed total lumber production in 1915, by 

 clapsps of mills. 



