BULLETIN 506, U. S. DEPARTMENT OF AGRICULTURE. 
QUANTITY 
OF LUMBER 
CLASS "V, 
0.0 OO M FT 
AND OVER 
QUANTITY 
OF LUMBER 
NO.OF 
MILLS 
CLASS IV 
5.000T0 9.999 
M.FT. ; 
QUANTITY 
OF LUMBER 
PRODUCTION BY CLASSES OF MILLS. 
Table 2 (page 7) shows the production by classes of sawmills for 
the years for which such data have been compiled. Mills having 
an annual cut of less 
than 50,000 feet 
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 s m all 
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 m 
1.0 00 TO 4-.9S9 
M. FT. 
NO.OF 
Mj LLS 
QUANTITY 
OF LUMBER 
CLASS XT 
5O0T0 99 9 
M FT. 
NO.OF 
MILLS 
Fig. 1. — Computed 
CLASS I 
50 TO 4-99 
M . F T. 
total lumber production in 1913, by 
classes of mills. 
