504 
The Philippine Journal of Science 
1921 
Reference number. 
Z5-D 38f ZSC 360 27A 27-B Z6-0 38f Z7G 260 380 27H 388 380 38A 270 380 
II 
10 
9 
f — < 
> 
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. 
