504 The Philippine Journal of Science 1921 
Reference number. 
250 38F 25C 260 27A 278 260 38E 27G 26F 386 27H 36B 38C 386A 27P IBD 
10 aot a 
quae coees" 
a Be ao awe 
— 
Modulus of rupture in 1,000 
pounds per square inch, 
= 
a 
lb 
x 
NN 
A 
i 
ot 
Fal 
Weight per cubic foot, dry. 
a it 
— 
| 
Fic. 16. Apitong No, 4; small specimens. 
Reference number. 
453. 464 45-2 16B IGC ASA IGA 304 31-1 462 464 463 30d 30-T 30P SIM 30K 461 452 457. 
2g _ 
£2 | PN 
E os I2 
sedi GR om, TE 
ate | ~~ Oe. 
a oes 
s* 3 eee oes 
p 
eee) Q Esoaed 
at 
2 4 VY | 
ww 
ov 
Ee 
Fic. 17. Tangile No. 1; small specimens. 
is due probably to irregularity in grain and to the great differ- 
ence in moisture of some of the specimens at the time of the 
tests. Other things being equal, the strength of wood varies 
directly with its dry weight. 
