Apr. 15,1925 Use of Liability Ratings in Forest Fire Protection 
697 
Region 
Table II .—Approximate areas of forest types by regions a 
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48 
891 
272 
906 
2 
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3, 539 
2 
35 
1, 448 
859 
2 
206 
183 
865 
1, 303j 
2, 352 
477 
1,837 
1,882 
1, 229 
3, 571 
1,935 
183 
2, 843 
952 
1,156 
1? 720 
336 
5, 433 
4, 739 
578 
65 
28 
327 
43 
60 
111 
( b ) 
( b ) 
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Areas in thousands of acres by forest types 
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1,108 
1,957 
217 
409 
123 
124 
620 
2, 207 
2, 214 
3, 510 
66 
315 
188 
240 
440 
512 
615 
102 
333 
366 
86 
576 
6 
836 
1, 297 
646 
60 
230 
543 
( b ) 
( b ) 
( b ) 
130 
Total 20, 605; 5,711 j 16, 699 *16, 264 4,812 3,724^1,421 
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69 
301 
1, 655 
346 
402 
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133 
1,128 
339 . 
455 _ 
80 160 
412 
1, 230 
689 
807 
1, 887 
95 
340 
1,511 
917 
1, 399 
16 
( b ) 
117 
( b ) 
447 
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210 
477 
40 
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806 
490 
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743 
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9,873 3,707 
18 
45 
35 
831 
2, 925 
213 
3, 259 
713 
2, 409 
144 
185 
( b ) 
( b ) 
( b ) 
( b ) 
1,331 
1,615 
413 
498 
( b ) 
( b ) 
( b ) 
20 
212 
838 
866 
1,143 
2, 726 
5,179 
1, 598 
554 
( b ) 
11,135 329 16,993 
383 
325 
553 
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( b ) 
97 
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1, 200 
1, 408 
3, 757 
348 
156 
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654 
2, 425i 
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( b ) 
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2, 745 
6,948 
5, 079 
4,390 
8, 470 
6, 441 
5, 296 
12, 561 
6, 076 
12, 470 
1,803 
2, 850 
5, 298 
5, 352 
7, 816 
6,308 
3, 376 
13, 871 
8, 682 
3, 541 
1,128 
12, 856 130, 501 
° These are in many cases based on very rough estimates. 
b Indicates area included with some other type. Totals for each region do not in most cases agree with 
sums of figures for separate types, because barren areas are also included in totals (sometimes barren is in¬ 
cluded in brush, grass, or subalpine). 
c Includes 543,000 acres jack pine in Region 21. d Includes 160,000 acres white and red pine in Region 21. 
Table III.^Percentages of total areas of different types burned over each year; 
averages for 5-year period, 1911-1915 a 
Commercial timber types 
Nonmerchantable types b 
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. 255 
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. 133 
.345 
.210 
.304 
.242 
. 236 
.038 
.018 
. 257 
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. 110 
. 322 
.385 
.014 
.438 
.445 
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Per ct. Per ct. Per ct. 
! (9 
1 0.009 
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Per ct. 
0. 034 
.017 
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1.418 
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Per ct. 
0.015 
.010 
.016 
.044 
.281 
. 390 
. 141 
. 114 
.042 
.050 
. 116 
.002 
.009 
.020 
.046 
.395 
.999 
.020 
.005 
.064 
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Per cti 
0.033 
.095 
. 102 
.245 
.246 
.329 
. 196 
.207 
.037 
.031 
.230 
.003 
.007 
.012 
.040 
. 196 
.878 
. 180 
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. 125 
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United States average: 86,878 acres out of 55.971,000 acres timber=0.155 per cent; 58,718 acres out ot 
47,839,000 acres noncommercial = 0.123 per cent; 145,596 acres out of 103,810,000 for all types=0.140 per cent. 
° Based on incomplete records for some regions, especially Washington and Oregon. 
6 Open and woodland types often combined; figures given apply to two or more types combined. 
c Less than 
of 1 per cent. 
d Jack pine. 
p None burned. 
