LUMBER CUT OF UNITED STATES, ISTO-IOSO. 
25 
computed total production of each of the last six j-ears, 1915 to 1920, 
inclusive. 
The striking difference in size between Class 5 and Class 1 mills as 
illustrated in Plate I and Plate II, respectively, helps to explain why- 
it is that more than two-thirds of the aggregate output of American 
sawmills was produced by 1,302 mills, or only 5.6 per cent of the 
23,242 computed to have been in operation. The percentage of the 
cut produced by the class of mills cutting 10,000,000 feet and over 
annually (class 5) has increased materiall}^ during the last 12 years. 
In 1909 this class of mills produced 43.09 per cent of the total cut 
for the year, while in 1920 the same class of mills cut 57.59 per cent 
of the total. But in general, for the last six years the proportional 
production by the five mill classes has changed but little. 
Table 2. — Reported production oj lumber, 1919, and computed totals 1915 to 1918, and 
1920, by classes of mills. 
Classes. 
AU classes: 
1915.... 
1916.... 
1917.... 
1918.... 
19191... 
1920.... 
Class 5; 10,000 M feet and over per year: 
1915 
1916 
1917 
1918 
19191 
1920 
Class 4; 5,000 M feet to 9,999 M feet per year: 
1915 
1916 
1917 
1918 
19191 
1920 
Class 3; 1,000 M to 4,999 M feet per year: 
1915 
1916 
1917 
1918 
19191 
1920 
Class 2; 500 M to 999 M feet per year: 
1915 
1916 
1917 
1918 
19191 
1920 
Class 1; 50 M to 499 M feet per year: 
1915 
1916 
1917 
1918 
19191 
1920 
Mills. 
Computed 
number 
operating. 
Percent. 
29, 951 
30,081 
24,815 
22,546 
29,534 
23, 242 
846 
925 
899 
785 
792 
795 
453 
484 
459 
505 
503 
507 
3, 191 
3, Oil 
2, 352 
2, 1&4 
3, 211 
2,730 
4,198 
4,594 
3,689 
3,1S3 
3, 977 
3,503 
21,263 
21,037 
17, 416 
15, 879 
18,396 
15, 707 
100.00 
100.00 
100.00 
100.00 
100.00 
100.00 
Computed quantity cut. 
M feet b. m. 
37, Oil, 656 
39, S07, 251 
35, 831, 239 
31, 890, 494 
34, 552, 076 
33, 798, 800 
2. 82 
3.08 
3.62 
3. 48 
2.68 
3.42 
1.51 
1.61 
1,8-5 
2.24 
1.70 
2.18 
10.66 
10.11 
9.48 
9. 73 
10.87 
11.75 
14,02 
15. 27 
14. 87 
14.12 
13. 47 
15. 07 
70.99 
69.93 
70, 18 
70. 43 
62. 29 
67.58 
20, 669, 746 
23, 310, 137 
22, 148, 570 
18,970, 552 
18, 814, 099 
19, 466, 600 
3, 224, 448 
3, 513, 767 
3, 360, 502 
3, 567, 104 
3,544,609 
3, 5S9, 600 
6, 201, 864 
5, 858, 675 
4, 615, 041 
4, 270, 755 
5, 972, 196 
5,305,900 
2, m, 2&4 
3, 096, 760 
2,460,685 
2, 13S, 005 
2, 662, S55 
2, 341, 200 
3, 974, 334 
4,027, 912 
3, -245, 541 
2, 944, 078 
3, 473, 750 
3, 095, 500 
1 The data shown for 1919 is quantity actually reported cut, and the total for all classes includes 2,655 
mills or 8.99 per cent cutting under 50 M feet, each reporting a total quantity of S4,567 Mfeet of 0.25 percent. 
