1921 
532 The Philippine Journal of Science 
Table 15 . — Average results of bending tests of timber of structural sizes 
and small specimens. 
Species. 
Tests. 
Mois- 
Spe- 
cific 
gravity 
oven 
dry, 
based 
on vol- 
ume 
when 
green. 
Modu- 
lus of 
elastic 
resili- 
ence. 
Modu- 
lus of 
rup- 
ture. 
Fiber 
stress 
elastic 
limit. 
Modu- 
lus of 
elastic- 
ity. 
Great- 
est cal- 
culated 
longi- 
tudinal 
shear. 
Ratio 
of the 
modu- 
lus of 
rup- 
ture of 
struc- 
tural 
sizes 
and 
small 
speci- 
mens. 
Per 
Lbs. per 
Lbs. per 
Lbs. per 
1,000 
Lbs. per 
Per 
cent. 
cu. in. 
sg. in. 
sq. in. 
lbs. per 
sq. in. 
cent. 
Tangile No. 1: 
sq. in. 
Structural sizes 
5 
31.9 
0.53 
1. 13 
8,570 
4,940 
2, 040 
600 
79 
Small specimens— 
23 
23.7 
0.52 
1.05 
10,840 
5, 190 
1, 910 
390 
Tangile No. 2: 
Structural sizes 
5 
33.3 
0.49 
0.97 
7,790 
4,060 
1, 860 
320 
80 
Small specimens.-- 
22 
26.3 
0. 46 
0.81 
9,700 
4,620 
1,680 
340 
Tangile No. 3: 
Structural sizes 
2 
29.8 
0.48 
1.30 
6,820 
4,080 
1, 530 
390 
76 
Sjnall specimens.— 
10 
22.75 
0.46 
1.04 
8,940 
4,810 
1,570 
320 
Tangile No. 4: 
Structural sizes 
4 
24.9 
0.46 
0.45 
6, 710 
2,690 
1, 690 
240 
68 
Small specimens— 
15 
18.8 
0.47 
1.08 
9,850 
5,030 
1, 600 
350 
Tangile average: 
Rt.rnctnrnl riwps 
29.9 
0.49 
0.96 
7,640 
3,940 
1,780 
360 
76 
29.9 
0.48 
0. 99 
10, 000 
4,910 
1,690 
350 
Apitong No. 1: 
Structural sizes 
2 
45.4 
0.64 
0.86 
6,640 
4,090 
2,420 
530 
59 
Small specimens— 
9 
26.1 
0.64 
0.48 
11, 230 
4, 100 
2,340 
400 
Apitong No. 2: 
Structural sizes 
4 
53.3 
0.58 
0.51 
6, 690 
3,290 
2,030 
390 
61 
Small specimens— 
11 
22.1 
0. 64 
1.17 
10, 910 
5, 180 
2,040 
390 
Apitong No. 3: 
Structural sizes 
4 
38.7 
0. 68 
0.83 
7,850 
4,260 
2,040 
400 
76 
Small specimens- .. 
17 
28.5 
0.68 
0.63 
10, 330 
4,510 
2,090 
370 
Apitong No. 4: 
Structural sizes 
4 
36.9 
0.64 
0. 63 
6,120 
3, 530 
1,960 
240 
61 
Small specimens— 
19 
24.9 
0.65 
1.05 
9,980 
5,850 
1,803 
350 
Apitong No. 5: 
Structural sizes 
3 
41.9 
0. 69 
t 0. 56 
7,210 
3,490 
1,730 
840 
66 
Small specimens— 
19 
29.9 
0.68 
0.71 
8,950 
4,150 
1,660 
320 
Apitong No. 6: 
Structural sizes 
1 
40.6 
0.69 
0. 69 
5,220 
3,120 
1,290 
290 
61 
Small specimens. 
3 
21.7 
6.69 
0.28 
10, 190 
3,500 
1,870 
860 
Apitong average: 
Structural sizes 

42.8 
0.65 
0.68 
6,820 
3,630 
1, 900 
860 
62 
Small specimens 
25.5 
0.66 
0.72 
10, 080 
4,560 
1,970 
870 
Apitong (from market) : 
Structural sizes 
4 
48.7 
1.56 
1.19 
7,870 
4, 400 
1,890 
540 
80 
Small specimens— 
13 
21.1 
0.66 
1.14 
9.790 
5.800 
1,840 
380 
Guijo (from market) : 
Structural sizes 
4 
63.3 
0.66 
3.13 
11,660 
8,020 
2,360 
730 
91 
Small specimens... 
19 
37.1 
0.64 
1.55 
12,810 
7,680 
2,140 
460 
