12 
BULLETIN" 286, IT. S. DEPARTMENT OF AGRICULTURE. 
Table 2. — Strength and stiffness of small pieces — natural arid treated — cut from the inside 
and outside portions of longleaf pine, loblolly pine, and Douglas fir stringers. 
Species, condition, and 
locality. 
Number 
of tests. 
Moisture 
(per cent). 
Rings per 
inch. 
Modulus 
of rupture 
(pounds per 
square inch). 
Fiber stress 
of elastic 
limit 
(pounds per 
square inch). 
Modulus 
of elasticity 
(1,000 
pounds per 
square inch). 
N. 
T. 
N. 
T. 
N. 
T. 
N. 
T. 
X. 
T. 
N. 
T. 
Longleaf pine: 
Partially air dry — 
All/ 
28 
24 
4 
23 
18 
29 
24 
5 
23 
17 
6 
28 
22 
6 
26 
21 
5 
38 
19 
19 
54 
27 
27 
21.5 
21.0 
24.6 
12.8 
13.0 
12.6 
20.3 
19.8 
22.2 
12.0 
12.0 
11.8 
30.1 
29.6 
30.6 
15.6 
14.8 
16.4 
27.5 
19.2 
19.6 
14.6 
19.9 
20.2 
18.5 
6.4 
6.9 
4.6 
7.2 
7.6 
5.7 
10.7 
11.7 
9.6 
13.2 
14.1 
12.2 
18.3 
19.3 
14.4 
19.6 
18.1 
14.2 
6.4 
6.9 
5.5 
7.4 
7.6 
5.8 
12.6 
13.9 
11.4 
13.1 
13.6 
12.6 
9,507 
9,455 
9,978 
13,520 
13, 109 
14,378 
8,605 
8,599 
8,592 
12, 491 
12,382 
13,003 
7,923 
8,041 
7,805 
10, 608 
10, 929 
10,287 
9,036 
9,046 
8,870 
11,418 
11, 208 
11,495 
6,571 
6,221 
8,148 
12, 182 
12, 122 
12, 157 
6,216 
6,862 
5,571 
6,598 
6,721 
6,475 
5,623 
5, 587 
5,953 
8,070 
8,060 
8,153 
5,109 
5,120 
5,010 
7,502 
7,434 
7,713 
4,450 
4,407 
4,493 
6,546 
6,953 
6,138 
5,365 
5,376 
5,088 
6,824 
6,855 
9,543 
3,531 
3,294 
4,560 
7,611 
7,644 
7,145 
3,434 
3,897 
2,971 
4,003 
4,021 
3,985 
1,493 
1,485 
L581 
1,663 
1,641 
1,714 
1,350 
1,339 
1,365 
1,605 
1,607 
1,595 
1,595 
1,617 
1,583 
1,778 
1,787 
1,770 
1,434 
1,428 
1 464 
Air dry — 
All 
1,508 
1,489 
Inside 
5 
1,527 
1,104 
Loblolly pine: 
Partially air dry- 
All. 
30 
24 
6 
30 
24 
6 
48 
24 
24 
66 
Outside 
1,086 
1,289 
Air dry — 
All 
1,603 
1,609 
1,550 
Douglas fir: 
Boiling process — 
Green- 
All 
1,486 
Outside 
Inside 
1,570 
1,401 
Air dry- 
All : . 
1,624 
Outside 
Inside 
Steaming process- 
Green— 
All 
33 
33 
1,617 
1,632 
Inside 
Air dry- 
All 
""": ] 
